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2026-08-20net/mlx5: E-Switch, use state lock for vport state changesMark Bloch5-5/+31
Protect vport admin state modifications and vport iteration with the eswitch state_lock mutex to ensure proper serialization of concurrent vport state changes. Currently, calls to mlx5_modify_vport_admin_state() and loops iterating over eswitch vports can race with each other, potentially leading to inconsistent vport state. Fix this by acquiring esw->state_lock Fixes: 7d0314b11cdd ("net/mlx5e: Modify uplink state on interface up/down") Signed-off-by: Mark Bloch <mbloch@nvidia.com> Reviewed-by: Shay Drori <shayd@nvidia.com> Reviewed-by: Or Har-Toov <ohartoov@nvidia.com> Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260816065015.3280733-2-tariqt@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20net: thunderbolt: Count delivered packets in rx_packets and rx_bytesFan Ye1-3/+3
tbnet_poll() increments rx_packets once per received frame because that is the NAPI work unit, and then adds the same number to stats.rx_packets. An skb is handed to the stack only when the last frame of a packet arrives, so once the MTU exceeds TBNET_MAX_PAYLOAD_SIZE the statistic reports frames. tx_packets is bumped once per skb, so the two ends of a link disagree: at MTU 65330 the receiver reports 16 times the packets its sender sent. rx_bytes has the matching problem: frames of a packet that is later dropped mid-assembly are already accounted, so it does not correspond to rx_packets as documented. Account for both where the packet is completed, and leave the NAPI work counter alone. Fixes: e69b6c02b4c3 ("net: Add support for networking over Thunderbolt cable") Signed-off-by: Fan Ye <fy15309206903@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Acked-by: Mika Westerberg <westeri@kernel.org> Link: https://patch.msgid.link/20260815-tbnet-rx-stats-v1-1-8da375c2cd09@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20ipv6: rpl: fix NULL dereference of idev in ipv6_rpl_srh_rcv()Andrea Mayer1-14/+12
ipv6_rpl_srh_rcv() dereferences idev from __in6_dev_get() without a NULL check when reading idev->cnf.rpl_seg_enabled. When the device's MTU drops below IPV6_MIN_MTU, addrconf_ifdown() clears dev->ip6_ptr through RCU_INIT_POINTER(). A packet that passed the idev check in ip6_rcv_core() can then reach ipv6_rpl_srh_rcv() with dev->ip6_ptr already NULL. Reproduced by flooding the receiving interface with ping6 traffic while flapping its MTU between 1500 and 1200: BUG: KASAN: null-ptr-deref in ipv6_rpl_srh_rcv+0xb3/0x1070 Read of size 4 at addr 00000000000006b4 by task ping6/394 CPU: 2 UID: 0 PID: 394 Comm: ping6 Not tainted 7.2.0-rc7-micro-vm-dev-00095-g24ef02f934ee #240 PREEMPT(full) Call Trace: <IRQ> kasan_report+0xc6/0x100 ipv6_rpl_srh_rcv+0xb3/0x1070 ip6_protocol_deliver_rcu+0x759/0x9a0 ip6_input_finish+0xa8/0x1b0 ip6_input+0xe1/0x490 ipv6_rcv+0x33d/0x460 __netif_receive_skb_one_core+0xd6/0x130 process_backlog+0x2cc/0xa00 __napi_poll.constprop.0+0x56/0x270 net_rx_action+0x327/0x730 handle_softirqs+0x11e/0x630 do_softirq+0xb3/0xf0 </IRQ> Both ipv6_rpl_srh_rcv() and ipv6_srh_rcv() are called only from ipv6_rthdr_rcv(), which already has an idev lookup. Fix the NULL dereference on the RPL path by checking idev in ipv6_rthdr_rcv(), before it calls either function. The callees take idev as an argument and no longer call __in6_dev_get(), so the packet is now dropped in one place, with SKB_DROP_REASON_IPV6DISABLED on both paths. Fixes: 8610c7c6e3bd ("net: ipv6: add support for rpl sr exthdr") Cc: stable@vger.kernel.org Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it> Tested-by: Xiang Mei <xmei5@asu.edu> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260817132644.2223-1-andrea.mayer@uniroma2.it Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20net/tcp-ao: fix use-after-free of current_key on reconnect to another peerHyunwoo Kim1-0/+9
tcp_inbound_ao_hash() is called before bh_lock_sock_nested() is taken, with only rcu_read_lock() held. On the fast path for established sockets, if the rnext_keyid sent by the peer differs from current_key->sndid, the key the peer asked for is looked up and stored in current_key. The lookup is inside the RCU read side, but current_key outlives it. When the socket is disconnected and connect() is called again for another peer, tcp_ao_connect_init() unlinks every key that does not match the new peer and frees it with call_rcu(). If current_key points at such a key, it is cleared to NULL. The fast path reads sk_state only once on entry, so a softirq that got into it while the socket was still established can update current_key after that loop has already run. The update is inside the RCU read side, so it comes before the call_rcu() callback, and once the callback frees the key, current_key is left pointing at freed memory. The next transmission picks that pointer up in tcp_get_current_key(). tcp_ao_transmit_skb() then reads the traffic key from the freed object, which is the use-after-free. Wait for one grace period before unlinking, and only if a key is going to be removed. By the time tcp_connect() runs the socket is already in TCP_SYN_SENT, and TCP_AO_ESTABLISHED does not contain TCPF_SYN_SENT, so a softirq entering after the wait cannot reach the fast path, and the ones already in it have finished. The existing NULL handling in the loop is then enough. Fixes: 0a3a809089eb ("net/tcp: Verify inbound TCP-AO signed segments") Cc: stable@vger.kernel.org Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Acked-by: Paolo Abeni <pabeni@redhat.com> Link: https://patch.msgid.link/aoIriv3pHDgII2YR@v4bel Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20Merge tag 'libnvdimm-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimmLinus Torvalds10-66/+191
Pull NVDIMM and DAX updates from Alison Schofield: "Most are DAX preparatory patches for FAMFS support, along with a few NVDIMM fixes and documentation cleanups. - Documentation cleanup, removing kernel-doc warnings - preparing DAX for FAMFS - misc NVDIMM fixups with cleanups for issues reported by Coccinelle" * tag 'libnvdimm-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: nvdimm-btt: clean up kernel-doc warnings libnvdimm: nd.h: clean up kernel-doc warnings dax: fsdev.c minor formatting cleanup dax: fix holder_ops race in fs_put_dax() dax: read holder_ops once in dax_holder_notify_failure() dax/fsdev: fail probe on invalid pgmap offset dax/fsdev: use __va(phys) for kaddr in direct_access dax/fsdev: clear pgmap ops and owner on unbind dax/fsdev: don't leave a dangling dev_dax->pgmap on probe failure dax/fsdev: clear vmemmap_shift when binding static pgmap dax/fsdev: fix multi-range offset in memory_failure handler dax: fix misleading comment about share/index union in dax_folio_reset_order() nvdimm/btt: reject an arena whose nfree is below the lane count libnvdimm/labels: Bound the on-media label size before the shift libnvdimm/labels: Prevent integer overflow in __nd_label_validate() nvdimm: ndtest: remove redundant NULL check before vfree() nvdimm: nfit: remove redundant NULL check before vfree()
2026-08-20net/sched: add get_fill_size callbacks for actions missing themVictor Nogueira9-1/+235
Several tc actions - act_police, act_bpf, act_pedit, act_ife, act_sample, act_ct, act_ctinfo and act_tunnel_key among them - provide no get_fill_size() callback, so tcf_action_fill_size() falls back to tcf_action_shared_attrs_size() which does not account for the action-specific netlink attributes emitted inside TCA_ACT_OPTIONS by their dump functions. When an RTM_NEWACTION request with NLM_F_ECHO (or an RTNLGRP_TC listener) creates several actions, tcf_add_notify_msg() allocates the echo skb from this underestimated size. When this happens, the act_api code fails to add all of the fields to the netlink message and, thus, fails to send it. Issue is that, when that happens, this failure doesn't stop the action instances from being added. So any user watching these events will be under the false impression that no actions were created at all. For example, act_pedit overruns with 32 actions of four munge keys each, act_police with 32 policers once the optional rate/peakrate/result/avrate attributes are present. To fix this, add the missing get_fill_size callbacks returning the worst-case size of each action's dump attributes, following the pattern used by act_gact/act_skbedit/act_vlan. Also widen the TCA_GACT_TM accounting in tcf_action_shared_attrs_size() to nla_total_size_64bit(), since actions dump their tcf_t with nla_put_64bit(), which may be preceded by an NLA_PAD attribute. Note: We only provided fixes for the actions we reproduced this bug with as of today. We can send a separate hardening patch for the remaining actions to net-next later. The other pre-existing issues, pointed out by Clashiko [1], will be fixed in upcoming patches. [1] https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260810164357.1653956-1-victor%40mojatatu.com Fixes: 4e76e75d6aba ("net sched actions: calculate add/delete event message size") Reported-by: Vega <vega@nebusec.ai> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Victor Nogueira <victor@mojatatu.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260816201327.2435335-1-victor@mojatatu.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20selftests: net: packetdrill: add tests for advertised MSS with PMTU exceptionsEric Dumazet2-0/+134
Add packetdrill tests for IPv4 and IPv6 to verify that the advertised MSS in SYN-ACK is derived from the configured interface/route MTU, and is not shrunk by learned Path MTU exceptions from previous outbound connections. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev> Link: https://patch.msgid.link/20260815071532.301908-1-jiayuan.chen@linux.dev Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20net: advertise TCP MSS from the configured MTU, not the learned PMTUJiayuan Chen4-3/+65
The MSS a host puts in its SYN tells the peer how big a segment it may send us. Right now we can shrink it with a PMTU we learned on our own send path, which is the wrong direction entirely. On asymmetric paths this bites - think DSR load balancers, where the request side goes through a smaller-MTU overlay. We learn a small PMTU going out, then advertise a small MSS, and the peer stays capped for the whole connection even though its path back to us is wide. MSS only shows up in the SYN and never grows back. On symmetric paths we lose nothing by dropping it either: the peer runs its own PMTU discovery and usually already knows the real path MTU. So work out the advertised MSS from the configured route or device MTU and ignore the learned PMTU. Our send side is unchanged, still clamped by tcp_current_mss(). Add ip_dst_mtu_configured()/ip6_dst_mtu_configured() and use them from the two default_advmss() paths. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Fixes: 164a5e7ad531 ("ipv4: ipv4_default_advmss() should use route mtu") Cc: stable@vger.kernel.org Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260815070413.294559-1-jiayuan.chen@linux.dev Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20net: macb: drop CONFIG_OF #if blockThéo Lebrun1-3/+1
Fix -Wimplicit-function-declaration error on CONFIG_OF=n builds: drivers/net/ethernet/cadence/macb_main.c: In function ‘macb_probe’: drivers/net/ethernet/cadence/macb_main.c:5951:15: error: implicit declaration of function ‘macb_alloc_tieoff’ [...] 5951 | err = macb_alloc_tieoff(bp); | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/cadence/macb_main.c:5973:9: error: implicit declaration of function ‘macb_free_tieoff’ [...] 5973 | macb_free_tieoff(bp); | ^~~~~~~~~~~~~~~~ Error got introduced because functions are mistakenly declared in a `#if defined(CONFIG_OF)` block. Instead of moving functions around, avoid any future mistake and drop the block entirely. Change the module content slightly on CONFIG_OF=n. Previously match tables were ignored. Now they appear in the resulting build. This is considered trivial in size by most and is the common case: ⟩ 18 out of 254 OF net drivers reference CONFIG_OF ⟩ rg -lF 'MODULE_DEVICE_TABLE(of,' drivers/net/ | tee /tmp/a | wc -l 254 ⟩ xargs -a /tmp/a rg -l CONFIG_OF | wc -l 18 Tangent: no, of_match_ptr() does not imply that the compiler can optimize out match tables, because MODULE_DEVICE_TABLE(of, ...) unconditionally puts the match tables in the binary. It is only meant to avoid undefined declaration issues when match tables are hidden behind a #ifdef, as was done before. We therefore drop the macro call. Fixes: 5262eab9462a ("net: macb: allocate tieoff descriptor once across device lifetime") Reported-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com> Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://patch.msgid.link/20260820-macb-fix-x86-v1-1-b2e7c902104e@bootlin.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20Merge tag 'execve-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds1-1/+1
Pull execve update from Kees Cook: - x86/elf: Correct comment for STACK_RND_MASK() (Lorenzo Stoakes) * tag 'execve-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: x86/elf: Correct comment for STACK_RND_MASK()
2026-08-20ACPI: scan: Defer device power initializationPeixin Xie2-4/+1
acpi_bus_get_power_flags() initializes the device power state while the ACPI device object is being created, before checking whether the device is ready for enumeration. If enumeration is deferred, acpi_bus_attach() clears the initialized and power_manageable flags. When the dependency is later satisfied, acpi_bus_init_power() is called again and takes additional references to the power resources used by the device. These references prevent the resources from being turned off when the device enters D3. This issue was reproduced on a SpacemiT K3 RISC-V Pico-ITX. The affected device uses a power resource through _PR0 and has an automatically derived dependency on its interrupt controller. The initial power initialization acquires a power resource reference. The device is then deferred, but that reference is not dropped. When the dependency becomes available, power initialization acquires another reference. Consequently, entering D3 only drops the reference count from 2 to 1 and _OFF is not evaluated: [ 0.314611] ACPI Debug: "I2P2 _STA" [ 0.318260] ACPI: \_SB_.I2P2: ACPI: PM: Power resource is on [ 0.323998] ACPI: \_SB_.I2P2: New power resource [ 0.382108] ACPI Debug: "I2P2 _STA" [ 0.478964] ACPI Debug: "I2P2 _ON" [ 0.482498] ACPI: \_SB_.I2P2: ACPI: PM: Power resource turned on [ 0.488597] ACPI Debug: "I2C2, PS0" [ 0.863170] ACPI: \_SB_.I2P2: ACPI: PM: Power resource already on [ 0.873686] ACPI Debug: "I2C2, PS0" [ 2.416055] ACPI Debug: "I2C2, PS3" [ 2.423397] ACPI: \_SB_.I2P2: ACPI: PM: Power resource still in use To address this, remove the early acpi_bus_init_power() call and leave regular ACPI device objects uninitialized until acpi_bus_attach() runs after the device is ready for enumeration. Power resource objects are initialized through acpi_add_power_resource() and do not require the generic initialization in acpi_bus_attach(), so mark them as initialized there. After the change, device power state initialization is deferred until its dependency is met. Since no reference is acquired before then, the power resource left on by firmware is turned off as unused after the namespace scan. Once the dependency is met, the resource is turned on once for the device and is turned off normally when the device later enters D3: [ 0.314628] ACPI Debug: "I2P2 _STA" [ 0.318277] ACPI: \_SB_.I2P2: ACPI: PM: Power resource is on [ 0.324016] ACPI: \_SB_.I2P2: New power resource [ 0.382118] ACPI Debug: "I2P2 _STA" [ 0.496116] ACPI: \_SB_.I2P2: ACPI: PM: Turning OFF [ 0.501081] ACPI Debug: "I2P2 _OFF" [ 0.504705] ACPI: \_SB_.I2P2: ACPI: PM: Power resource turned off [ 1.415899] ACPI Debug: "I2P2 _ON" [ 1.418866] ACPI: \_SB_.I2P2: ACPI: PM: Power resource turned on [ 1.424947] ACPI Debug: "I2C2, PS0" [ 2.647655] ACPI Debug: "I2C2, PS3" [ 2.654856] ACPI Debug: "I2P2 _OFF" [ 2.654866] ACPI: \_SB_.I2P2: ACPI: PM: Power resource turned off This also avoids powering up devices before their dependencies are available. Signed-off-by: Peixin Xie <peixin.xie@linux.spacemit.com> [ rjw: Changelog edits ] Link: https://patch.msgid.link/20260820-acpi-power-resource-ref-fix-v2-1-29818173ea13@linux.spacemit.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2026-08-20Merge tag 'bitmap-for-7.3' of https://github.com/norov/linuxLinus Torvalds68-138/+402
Pull bitmap updates from Yury Norov: "The usual set of fixes, cleanups and performance improvements together with a couple of new tests: - bitmap_find_next_zero_area_off() optimization (Sunyi) - bitmap_find_next_zero_area_off(): return size when no zero area is found (Yury) - bitmap vs IDA vs Maple Tree performance test (Yury) - get rid of cpumap_print_to_pagebuf() (Yury) - use nr_node_ids in __nodemask_pr_numnodes() (Li RongQing) - bitops: make the *_bit_le functions use unsigned long (Benjamin) - bitmap scatter & gather test fix (Christophe) - use __ASSEMBLER__ in bitmap header files (Thomas)" * tag 'bitmap-for-7.3' of https://github.com/norov/linux: (25 commits) lib: test bitmap vs IDA vs Maple Tree performance for region allocations bitmap: Return size when no zero area is found media: s5p-mfc: Treat bitmap size as allocation failure crypto: ccp: Treat bitmap size as allocation failure powerpc/msi: Treat bitmap size as allocation failure ARM: dma-mapping: Treat bitmap size as allocation failure bitmap: drop bitmap_next_set_region() nodemask: reduce bitmap width to nr_node_ids in __nodemask_pr_numnodes() bitmap: Properly initialise destination bitmap for scatter & gather test lib/bitmap-str: get rid of cpumap_print_to_pagebuf() perf: Use sysfs_emit() for cpumask show callbacks PCI/sysfs: Use sysfs_emit() for cpumask show callbacks RDMA/hfi1: Use sysfs_emit() for cpumask show helper hwtracing: hisi_ptt: Use sysfs_emit() for cpumask show fpga: dfl-fme-perf: Use sysfs_emit() for cpumask show devfreq: Use sysfs_emit() for cpumask show callbacks cpu: Use sysfs_emit() for cpumask show callback x86/events: Use sysfs_emit() for cpumask show callbacks powerpc: Use sysfs_emit() for cpumask show callbacks arm: Use sysfs_emit() for cpumask show callbacks ...
2026-08-20Merge tag 'ipsec-2026-08-18' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsecJakub Kicinski6-26/+73
Steffen Klassert says: ==================== pull request (net): ipsec 2026-08-18 1) xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full Tighten the secpath-depth check so a full chain can't write past xvec[]. 2) Add and revert "esp: do not unref managed frag pages in esp_ssg_unref()" The patch does not fully fully resolve the issue, a corrected version will follow. 3) xfrm: espintcp: fix UAF during close Synchronize espintcp close with the xfrm_trans_reinject work queue so the freed socket message isn't dereferenced again. 4) xfrm: drop ESP-in-TCP packets with no ingress device Drop queued ESP-in-TCP records whose saved ingress device has gone away, avoiding a NULL device deref in the XFRM input path. 5) xfrm: avoid lock inversion in nat keepalive work Split the NAT keepalive walk into a reference-collection phase and a per-state lock phase to break the AB-BA with state removal. This patch has some issues that are fixed with a followup patch. 6) xfrm: Fix skb double-free in xfrm_dev_direct_output() Stop freeing the skb unconditionally in xfrm_dev_direct_output(), letting local_out()'s result indicate when ownership has moved on. 7) xfrm: ah6: validate routing header segments_left Validate the segments_left/hdrlen invariant before rearranging the routing-header addresses, avoiding an OOB memmove on malformed HDRINCL packets. 8) xfrm: fix xfrm_state_construct() auth-trunc leak Detect an already-attached auth-trunc allocation by the pointer rather than inferring it from the algorithm id, so a prior attach isn't overwritten and lost. 9) xfrm: bound nat keepalive state collection Replace the per-state allocation in the NAT keepalive walk with a fixed-size batch that drains under BH-disabled locking and resumes from the cursor, bounding the worker's memory. * tag 'ipsec-2026-08-18' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec: xfrm: bound nat keepalive state collection Revert "esp: do not unref managed frag pages in esp_ssg_unref()" xfrm: fix xfrm_state_construct() auth-trunc leak xfrm: ah6: validate routing header segments_left xfrm: Fix skb double-free in xfrm_dev_direct_output() xfrm: avoid lock inversion in nat keepalive work xfrm: drop ESP-in-TCP packets with no ingress device xfrm: espintcp: fix UAF during close esp: do not unref managed frag pages in esp_ssg_unref() xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full ==================== Link: https://patch.msgid.link/20260818092920.653034-1-steffen.klassert@secunet.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20Merge tag 'nf-next-26-08-18' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-nextJakub Kicinski10-114/+302
Pablo Neira Ayuso says: ==================== Netfilter/IPVS fixes for net-next This contains fixes for nf_tables, revisit issues with expectation infra updates reported by sashiko, an ipset fix for deletions in the hash:net type and tne fix for the IPVS FTP helper. 1) Validate layer 4 header mangling done via nfnetlink_queue and nft_payload, this is a follow up to recent similar validation at layer 3. From Zhiling Zou. 2) Do not allocate memory on delete operations in ipset hash:net type, delete operation must always succeed. From Florian Westphal. 3) Deliver nft_obj overquota packet path notification directly via nfnetlink, do not use the control plane batch logic. From Fourie Zhang. 4) Follow up to controlidate check for reinserted dead expectations, to cover the nf_conntrack_expect_related_pair() function too. 5) Do not expose expectation dead flag to userspace via ctnetlink. 6) Make commit set_update_list per-netns to prepare to publish set clone earlier. 7) Publish the set clone earlier from commit path to address set lookup failures during table re-creation, this is targetting the rbtree and pipapo set backends. 8) Fix an integer overflow in the IPVS FTP helper. A similar fix was already proposed for the conntrack FTP helper months ago. From Joas Antonio dos Santos. * tag 'nf-next-26-08-18' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next: ipvs: fix integer overflow in ftp helper port/address parsing netfilter: nf_tables: call set ops .commit when building new ruleset blob netfilter: nf_tables: move set_update_list to nftables per-netns netfilter: ctnetlink: do not expose expectation DEAD flag netfilter: nf_conntrack_expect: consolidate check for insertion of dead expectation netfilter: nf_tables: don't queue packet path object notifications netfilter: ipset: remove need to allocate memory on delete operations netfilter: validate L4 headers after userspace packet writes ==================== Link: https://patch.msgid.link/20260817232957.1281637-1-pablo@netfilter.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20ipv6: use RCU iterator to dump route exceptionsYuyang Huang1-1/+1
rt6_nh_dump_exceptions() uses hlist_for_each_entry() to iterate over RCU-protected exception lists. The caller holds rcu_read_lock(), but does not hold rt6_exception_lock, so rt6_insert_exception() can concurrently add an entry with hlist_add_head_rcu(). KCSAN reports this race (irrelevant details omitted): ================================================================== BUG: KCSAN: data-race in rt6_insert_exception / rt6_nh_dump_exceptions write (marked) to 0xffff8a7c44c59620 of 8 bytes by interrupt on cpu 5: rt6_insert_exception+0x3bb/0x760 __ip6_rt_update_pmtu+0x4fe/0x750 ip6_sk_update_pmtu+0x19a/0x3b0 udpv6_err+0x3ff/0x800 icmpv6_notify+0x1e1/0x440 icmpv6_rcv+0x8c0/0xab0 ip6_protocol_deliver_rcu+0x616/0x840 ip6_input_finish+0xb9/0x160 ... entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8a7c44c59620 of 8 bytes by task 549 on cpu 14: rt6_nh_dump_exceptions+0xb3/0x260 rt6_dump_route+0x53e/0x5f0 fib6_dump_node+0x6d/0xf0 fib6_walk_continue+0x290/0x2d0 fib6_dump_table+0x28d/0x360 inet6_dump_fib+0x37d/0x620 rtnl_dumpit+0x7b/0xd0 netlink_dump+0x3ae/0x7e0 ... entry_SYSCALL_64_after_hwframe+0x77/0x7f 4 locks held by dumper/549: ... #1: (rcu_read_lock){....}-{1:3}, at: inet6_dump_fib+0x88/0x620 #2: (&tb->tb6_lock){+.-.}-{3:3}, at: fib6_dump_table+0x1e9/0x360 #3: (rcu_read_lock){....}-{1:3}, at: rt6_dump_route+0x483/0x5f0 value changed: 0xffff8a7c44e05700 -> 0xffff8a7c45d60100 Reported by Kernel Concurrency Sanitizer on: CPU: 14 UID: 0 PID: 549 Comm: dumper Not tainted 7.2.0-rc7-virtme #38 PREEMPT(lazy) ... Use hlist_for_each_entry_rcu() to safely iterate over the exception list. Fixes: 1e47b4837f3b ("ipv6: Dump route exceptions if requested") Cc: stable@vger.kernel.org Signed-off-by: Yuyang Huang <sigefriedhyy@gmail.com> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/20260815084651.69477-1-sigefriedhyy@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20net: ipa: fix stalled modem TX queue after runtime resumeJorijn van der Graaf1-1/+17
ipa_start_xmit() unconditionally stops the TX queue before calling pm_runtime_get(), relying on the wake scheduled by runtime resume (ipa_modem_wake_queue_work()) to restart it once power is ACTIVE. But that work is queued from within the runtime resume callback, before the device's power state reaches RPM_ACTIVE, so it can run while the device is still RPM_RESUMING. The wake is then consumed too early: the transmit it restarts stops the queue again, pm_runtime_get() returns -EINPROGRESS without arranging any future wake (deferred_resume exists only for RPM_SUSPENDING), and after the resume completes nothing is left to wake the queue. Transmit stalls permanently: packets pile up in the qdisc behind the stopped queue, the device runtime-suspends, and since the netdev registers no ndo_tx_timeout the watchdog never fires. Observed on SM7635 (Fairphone 6) as the cellular data path going permanently deaf within hours, RX included, since nothing resumes the suspended endpoints. Close the window by making the wake work wait for the resume to complete (pm_runtime_get_sync()) before waking the queue. Every queue stop is then guaranteed a later wake that happens while power is ACTIVE; a transmit racing a new suspend/resume cycle re-schedules the work. If the device could not be resumed, wake the queue anyway so pending packets are dropped by the transmit path rather than stranded. The STARTED power flag used to narrow this window: a wake running before the transmit path's stop suppressed that stop, but only once, as the flag was cleared by the first stop it absorbed. Removing the flag made a single transmit during an in-flight resume sufficient to strand the queue, which is the form observed. With an accelerated reproducer (autosuspend delay shortened to 5 ms, ~20 packets/s of TX), an unpatched kernel stalled three times in 230 s / 4380 packets; with this patch the same test ran 3601 s / 70298 packets without a stall. Fixes: 688de12f080f ("net: ipa: kill the STARTED IPA power flag") Cc: stable@vger.kernel.org Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20260815040302.653650-1-jorijnvdgraaf@catcrafts.net Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20net: bridge: Reject descending VLAN tunnel rangesRuoyu Wang1-1/+2
A pair of descending VLAN and tunnel IDs can pass the tunnel range span check. The VLAN subtraction produces a negative int, which is converted to unsigned when compared with the u32 tunnel ID subtraction. It can therefore equal the wrapped tunnel ID delta. The range loop then performs no iterations. Since the batched notification handling added a post-loop error check, this leaves err uninitialized and makes the request's return value unpredictable. Reject descending VLAN ranges before comparing the spans. Valid ascending and single-entry ranges remain unchanged, while malformed descending ranges consistently return -EINVAL. This issue was found by a static analysis checker and confirmed by manual source review. Fixes: 94339443686b ("net: bridge: notify on vlan tunnel changes done via the old api") Signed-off-by: Ruoyu Wang <ruoyuw560@gmail.com> Acked-by: Nikolay Aleksandrov <razor@blackwall.org> Link: https://patch.msgid.link/20260814134053.1387275-1-ruoyuw560@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20Merge tag 'kcsan-20260817-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/melver/linuxLinus Torvalds1-2/+10
Pull Kernel Concurrency Sanitizer (KCSAN) update from Marco Elver: - Avoid unintended access checking in NMIs * tag 'kcsan-20260817-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/melver/linux: kcsan: avoid unintended access checking in NMIs
2026-08-20xsk: fix NULL pointer dereference in __xsk_rcv()Cen Zhang (Microsoft)1-3/+27
In the __xsk_rcv() multi-buffer path, xsk_buff_alloc() is called in a loop without checking its return value. xsk_buff_can_alloc() only counts fill queue entries without validating their addresses, so it can succeed while xsk_buff_alloc() rejects all remaining entries and returns NULL. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:__xsk_rcv+0x426/0xc20 (net/xdp/xsk.c:350) Call Trace: xsk_generic_rcv+0x26d/0x5f0 xdp_do_generic_redirect+0x3c5/0xcf0 do_xdp_generic+0x92f/0xe70 __netif_receive_skb_core.constprop.0+0xf7e/0x2b30 Fix this with a two-stage transaction. First allocate and stage all buffers required for the packet, recycling all staged buffers with xsk_buff_free() if any allocation fails. Only after this stage succeeds, copy the data, reserve the RX descriptors, and release the buffers in an error-free loop. Fixes: 804627751b42 ("xsk: add support for AF_XDP multi-buffer on Rx path") Reported-by: AutonomousCodeSecurity@microsoft.com Signed-off-by: Cen Zhang (Microsoft) <blbllhy@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Reviewed-by: Jason Xing <kerneljasonxing@gmail.com> Link: https://patch.msgid.link/20260813215328.99311-1-blbllhy@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-20Merge tag 'sched_ext-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_extLinus Torvalds49-2577/+8794
Pull sched_ext updates from Tejun Heo: "Most of this cycle completes the enqueue-path support for hierarchical sub-scheduling, which makes sub-scheduler support feature complete: a root BPF scheduler can now hand a cgroup subtree over to a nested sub-scheduler together with revocable CPU grants, and the sub-scheduler owns all scheduling decisions for its tasks on those CPUs. Development volume was high and a number of changes plugging holes in the new support landed late in the cycle. Also included are core scheduling fixes that were completed too late for the v7.2 release and are routed through this pull request. Sub-scheduler CPU delegation: - Parent schedulers now grant and revoke per-CPU capabilities (enqueueing, preemption, CPU frequency control) on their children, enforced on every path a scheduler can reach a CPU through. Previously only dispatching could be delegated; this lets sub-schedulers fully schedule their CPUs. - Rescue execution: a task whose scheduler doesn't have access to the CPUs the task needs to run on starved until the watchdog ejected the whole scheduler. The kernel now runs such tasks directly on a small bandwidth budget, turning a scheduler-killing failure into bounded degradation. - Cgroup integration: tasks migrating across a sub-scheduler boundary weren't re-homed to the new owner, causing wrong-scheduler scheduling and a use-after-free. Sub-schedulers now take over their cgroup subtree and receive its cgroup callbacks. - Arena objects now cross the kernel/BPF boundary as typed pointer arguments, translated transparently by the BPF tree's new arena argument support, replacing untyped arguments with manual translation. - scx_qmap now demonstrates full hierarchical sub-scheduling. Other fixes and updates: - Robustness improvements: the abort path is now NMI-safe, fixing deadlocks when errors are raised from NMI context and making hardlockup recovery direct. Reenqueue loops that could monopolize a CPU ahead of the watchdog now eject the offending scheduler, and stalls are blamed on the scheduler actually responsible. - Hardening: BPF-writable arena memory is validated before kernel use, and task slice and vtime writes got explicit synchronization rules, closing corruption vectors open to buggy or malicious schedulers. - Core scheduling: sched_ext dispatching can drop the rq lock inside the core-wide pick, which let interleaving selections corrupt each other's state and hard-hang the machine. The selection now restarts when the lock was released. The task ordering callback was also invoked with its arguments swapped, and the default ordering is updated to work across sub-scheduler boundaries. The fixes are marked for stable. - Other fixes headed for stable: a task init leak on fork failure during enable, tooling compat macros that silently failed to detect newer kernels, and a crash on reenqueueing against a destroyed dispatch queue. - Tooling: scx_pair moves off deprecated callbacks, and the deprecated scx_bpf_cpu_rq() kfunc is removed" * tag 'sched_ext-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: (144 commits) sched_ext: Drop the dead SCX_DEQ_CORE_SCHED_EXEC test in dequeue_task_scx() sched_ext: Make core-sched task ordering hierarchy-aware sched_ext: Use runnable_at for the default core-sched task ordering sched_ext: Fix inverted ops.core_sched_before() invocation sched_ext: Move the config-off sub-cap kfunc stubs into sub.c sched_ext: Rename balance-era identifiers to dispatch terms sched_ext: Drop the stale keep_prev fixup in dispatch_pick() sched_ext: Keep kick_sync waiting on the rq's own CPU sched_ext: Make SCHED_CLASS_EXT select GENERIC_ALLOCATOR sched_ext/scx_flatcg: Fix cvtime true-up on slice expiry sched_ext: Don't BUG_ON a destroyed DSQ in process_deferred_reenq_users sched_ext: Fix scx_bpf_dsq_move_to_local___v2 compat detection sched_ext: Make scx_bpf_events() read the calling scheduler's counters sched_ext: Drop unlocked scx_rq_clock_invalidate() from scx_root_disable() selftests/sched_ext: Fix flaky ddsp failure tests on busy systems selftests/sched_ext: Make numa idle validation race-free sched_ext: Fix scx_bpf_dsq_reenq___compat kfunc extern prototype sched_ext/scx_flatcg: expire cached hweights on weight changes sched_ext: Fix exit_task leak on fork failure during enable sched_ext: fix stale references in doc comments ...
2026-08-20Merge tag 'cgroup-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroupLinus Torvalds18-303/+747
Pull cgroup updates from Tejun Heo: - Attach path bug fixes: migrations spanning multiple source or destination cpusets were mishandled, most visibly leaving thread affinities stale when the controller is disabled in a threaded subtree. Configuration writes could also race an in-flight attach and apply stale state, and the deadline task count could get corrupted by concurrent updates, skewing SCHED_DEADLINE admission decisions. - Memory binding bug fixes: which node masks get applied differed between the binding update paths, and tasks cloned with CLONE_INTO_CGROUP skipped rebinding entirely. Rebinding also now runs once per process instead of repeating for every thread sharing the mm. - Overhead removals with no behavior change: CPU hotplug iterated tasks of cpusets that just inherit the parent's effective masks, and the slab-spreading task flag was still being maintained although the SLAB allocator that consumed it is long gone. - Data-race annotations for benign races so that KCSAN reports stay meaningful, selftest coverage for the fixes above along with flakiness and portability fixes, and documentation corrections. * tag 'cgroup-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (34 commits) selftests/cgroup: Remove redundant chown in test_cgcore_lesser_ns_open selftests/cgroup: Preserve CPU hotplug write errors cgroup/cpuset: Add test for partition root invalidation returning wrong CPUs cgroup/cpuset: Remove obsolete PFA_SPREAD_SLAB task flag docs: cgroup-v2: fix stale "io" controller introduction selftests/cgroup: Avoid awk -e in cpuset tests cgroup/cpuset: Use WRITE_ONCE() for shared prs_err updates selftests/cgroup: add user_usec sanity check in test_cpucg_nice cgroup: drop unneeded semicolon docs: cgroup-v2: mark memory.pressure and io.pressure as read-write selftests/cgroup: Fix minor defects in test_cpuset Docs/admin-guide/cgroup-v2: fix delay_nsec unit in io.latency doc selftests/cgroup: Remove redundant cg_enter_current() call in test_core selftests/cgroup: Add test for cpuset affinity on controller disable cgroup/cpuset: Handle the special case of non-moving tasks in cpuset_can_attach() cgroup/cpuset: Support multiple destination cpusets for cpuset_*attach() selftests/cgroup: fix missing TAP output in test_hugetlb_memcg cgroup/cpuset: Support multiple source cpusets for cpuset_*attach() cgroup/cpuset: Move mpol_rebind_mm/cpuset_migrate_mm() calls inside cpuset_attach_task() cgroup/cpuset: Make attach_ctx.old_cs track task group leader ...
2026-08-20Merge tag 'wq-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds4-107/+240
Pull workqueue updates from Tejun Heo: - Worker wakeups moved out of pool->lock on the hot paths, shortening lock hold times. The wakeup can be expensive on arm64 due to the idle wakeup IPI, and the change improves the workqueue microbenchmark there by up to 10% - Stall diagnostics now report pools stuck with no running worker, with a backtrace of what the CPU is executing and the likely culprit worker, instead of dumping every in-flight worker - Preparation for turning per-cpu workqueues into an affinity scope of unbound workqueues instead of a separate backend - Race annotations for KCSAN and sparse warnings, and doc and monitoring script fixes * tag 'wq-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (23 commits) workqueue: annotate racy p->wake_cpu accesses in kick_pool_pick() workqueue: BUG_ON() instead of returning NULL in wq_node_nr_active() workqueue: use RCU accessors when populating wq->cpu_pwq workqueue: use rcu_dereference_sched() in workqueue_congested() workqueue: skip the node_nr_active update for non-unbound workqueues workqueue: rename alloc_unbound_pwq() to alloc_pwq() workqueue: allocate attrs for all workqueues workqueue: rename wq->unbound_attrs to wq->attrs workqueue: test WQ_UNBOUND explicitly in the hotplug loops workqueue: account nr_active by the backing pool workqueue: release pwq pools by pool type workqueue: factor out alloc_and_link_percpu_pwqs() workqueue: factor out get_percpu_pool() docs: workqueue: Fix bracket workqueue: annotate racy sum_exec_runtime reads for CPU-intensive detection workqueue: annotate racy PWQ_STAT_CPU_TIME update in wq_worker_tick() workqueue: dump the last woken worker for stalled pools workqueue: trigger a single-CPU backtrace for stalled pools workqueue: only show running workers in stall diagnostics workqueue: defer the worker wakeup outside pool->lock in process_one_work() ...
2026-08-20Merge tag 'docs-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linuxLinus Torvalds85-603/+8018
Pull documentation updates from Jonathan Corbet: "It has been a not-too-busy cycle for docs; here's the highlights: - A (hopefully) consensus change to our LLM-attribution requirements, removing the specific model name from the Assisted-by tag - A couple of new realtime documents - Various docs-build-system fixes - Ongoing work with the Chinese, Portuguese, and Japanese translations ...and lots of typo fixes, grammar tweaks, etc" * tag 'docs-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: (85 commits) Doc: admin-guide: pm: Remove unnecessary backticks and fix a spell Documentation: Extend the real-time hardware bits with some firmware bits docs: pt_BR: Reorganize process/index.rst to follow english structure docs: conf.py: fix the 'utf-8' typo doc tools: fix 'path' typos Documentation: real-time: Add kernel configuration guide docs: python: abi_regex: convert adjacent index placeholders docs: python: abi_regex: catch the right exception for a bad regex docs: sphinx-build-wrapper: include localversion in kernel version string Documentation: html: adjust sidebar section titles styling Documentation: html: show sections in the sidebar checkpatch.pl: adapt to new Assisted-by: format MAINTAINERS: update Traditional Chinese documentation maintainers docs: pt_BR: process: Translate CVE documentation docs: pt_BR: translate the management-style.rst to Brazilian Portuguese docs: xforms_lists: support DEFINE_IDTENTRY_IRQ() coding-assistants: simplify attribution docs: translations: pt_BR: translate email-clients.rst docs: pt_BR: process: Translate the security-bugs.rst doc:it_IT: align doc-guide translation ...
2026-08-20irqchip/irq-realtek-rtl: Use readl_be()/writel_be() instead of readl()/writel()Rustam Adilov1-7/+13
When CONFIG_SWAP_IO_SPACE is enabled, readl() performs a swap from little endian device to big endian CPU and vice versa for writel(). This is incorrect for Realtek Interrupt controller as that is a big endian device and so the LE to BE conversions are unwanted. Fix this by converting the MMIO accesses to readl_be() and writel_be(). Fixes: 9f3a0f34b84a ("irqchip: Add support for Realtek RTL838x/RTL839x interrupt controller") Signed-off-by: Rustam Adilov <adilov@disroot.org> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Tested-by: Carlo Szelinsky <github@szelinsky.de> Link: https://patch.msgid.link/20260820162017.28507-1-adilov@disroot.org
2026-08-20futex: Fix might_sleep() warning in futex_pivot_pending()Peter Zijlstra5-4/+54
A younger me put a WARN in might_sleep() to warn about nested sleep loops. This younger me also build a wait-loop variant that can deal with it. This wait-loop variant doesn't have all the fancy wrappers, since it isn't used much. It also lacks wait-bit support. Add the wait-bit support and use it to fix the nested wait issue. Fixes: 8e7ff730dd96 ("futex: Fix race in futex_pivot_pending() during private hash resize") Reported-by: syzbot+350a93852ac854927f45@syzkaller.appspotmail.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@kernel.org> Link: https://patch.msgid.link/20260820074927.GH1246887@noisy.programming.kicks-ass.net Closes: https://syzkaller.appspot.com/bug?extid=350a93852ac854927f45
2026-08-20Merge tag 'sysctl-7.03-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctlLinus Torvalds25-353/+451
Pull sysctl updates from Joel Granados: - Fix kernel-doc warnings by adjusting in file documentation - Consolidate do_proc_* function into do_proc_vec Consolidate three slightly different implementations of applying a converter on all elements of a vector. Fixes to this function now propagate to the three types. - Replace CONFIG_PROC_SYSCTL with CONFIG_SYSCTL (they were the same) and restrict cad_pid modifications to global root (GLOBAL_ROOT_UID) * tag 'sysctl-7.03-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl: sysctl: remove CONFIG_PROC_SYSCTL, it just mirrors CONFIG_SYSCTL sysctl: move the "cad_pid" entry from pid_table[] to kern_reboot_table[] sysctl: repair some kernel-doc comments sysctl: add Returns: kernel-doc for all functions sysctl: Update API function documentation sysctl: Rename proc_doulongvec_minmax_conv to proc_doulongvec_conv sysctl: Group proc_handler declarations and document sysctl: Replace do_proc_do{int,ulong,uint}vec with do_proc_vec sysctl: Add negp parameter to douintvec converter functions sysctl: Move default converter assignment out of do_proc_dointvec
2026-08-20Merge tag 'net-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextLinus Torvalds1437-28770/+111209
Pull networking updates from Jakub Kicinski: "One of the 'small improvements all over the place' releases for us. It's hard to draw any direct comparisons because summer vacations disrupted our patch processing (and presumably - generation) quite a bit. Quick and dirty count suggests we (Paolo and I) merged a very similar number of net (632) and net-next (648) patches. This is not telling the full story either because 1/3 to 1/2 of the net-next patches also *seem* like AI-driven low priority fixes, cleanups and clarifications. We are completely overwhelmed, of course. The glimmer of hope is that we secured sufficient LLM budget and access (thank you Meta!) to run reviews with multiple frontier models on each patch. This eliminates some hallucinations. That said, in terms of review, the LLMs can only do so much. The sad truth is that our APIs (especially for rare events like PCIe errors, timeouts etc) have always been racy, and now LLMs don't let us ignore that. I expect our direction for the next release will be to tweak the reviews a little bit more, but start shifting focus to letting the LLMs take care of the busy work - managing patchwork, automating common process complaints, editing commit messages, and maybe applying patches which already got "reviewed-by" tags from people we trust... Core & protocols: - A few steps lowering rtnl_lock dependence: - per-netns netdev unregistration for select SW drivers (e.g. veth, ipvlan, tunnels) - rtnl_lock-less FIB rule changes (RTM_NEWRULE and RTM_DELRULE) - prepare software drivers and TC qdiscs for rtnl_lock-less GET - Support BIG TCP (>64kB TSO) in UDP tunnels (vxlan, geneve) - Support buffers larger than PAGE_SIZE in devmem zero-copy API - Improve MPTCP handling of extreme memory pressure handling, when out-of-order queue had to be pruned - Report the per-group user count via RTM_GETMULTICAST - Expose the route deletion reason in RTM_DELROUTE - Add a SO_RIGHTS_NOTRUNC option to UNIX sockets to enable more useful handling of LSM denials when receiving SCM_RIGHTS messages: instead of truncating the message at the first blocked fd, keep every fd slot and store the LSM errno in the blocked slot - IPv6 Segment Routing - support looking up the post-encap SID (address) in a different/specified routing table - Support PRP RedBox (interlink) creation - Support per-nexthop UDP dst port in VXLAN - Continue converting getsockopt callbacks in a number of protocols to iov_iter Ethernet: - Merge initial CXL support for AMD/Solarflare NICs (shared branch with the CXL tree) - New drivers: - ADIN1140 10BASE-T1S MACPHY - Initial skeleton of Intel iXD and ZTE Dinghai drivers - High-speed NICs: - AMD/Pensando: - support firmware flashing - Cisco (enic): - SR-IOV V2 admin channel and MBOX protocol - Huawei (hns3): - support for ethtool pfc_prevention_tout - nVidia/Mellanox: - support sharing bandwidth control across interfaces of the same device - Marvell (octeontx2-pf): - link RQ page pools to netdev for Netlink stats - Google vNIC: - XDP metadata support for DQ RDA - Microsoft vNIC: - support forcing full-page RX buffers - Other NICs: - Synopsys IP: - eic7700: support for eth1 - Microchip (lan743x): - support for RMII interface - Wangxun: - support for ethtool -G and -C for VFs - add Tx timeout and PCIe error handling - Intel (igb/igc): - RSS key get/set support - support for forcing link speed without auto-negotiation - Switches: - NXP (dpaa2): - support bonding/LAG offload - Mediatek: - mt7530: EN7528 support - initial support for MT7628 - Micrel (ksz8/9): - refactoring work to move towards library model - PTP support for KSZ8463 - nVidia/Mellanox: - support rtnl-lock-less ethtool callbacks - Realtek: - rtl8366rb: use generic RTL83xx code - support SGMII and HSGMII for RTL8367S - PHYs: - Airoha: - EcoNet EN7528 PHY support - DAPU Telecom - DAPU Telecom DAP8211R(I) Gigabit PHY support - Realtek: - support RTL8261C_CG - support RTL8261D Wireless: - nl80211: per-link statistics support for multi-link operation - mac80211: AQL/airtime-fairness support for multicast - Merge Peripheral Authentication Service (PAS) / TEE support for ath12k (shared branch with the firmware/qcom tree) - New drivers: - mm81x for Morse Micro Long-Range S1G devices - nxpwifi for NXP devices (mostly forked off from mwifiex) - Driver changes: - Broadcom (brcmfmac): - DPP support, some Cypress part update - MediaTek (mt76): - mt7928 support - mt7925 NAN support - mt7996 AP powersave improvements - Qualcomm (ath12k): - much kernel infrastructure integration work - AHB platform MultiPD support - Realtek (rt89): - LED support - RTL8922DE support - dual-BT coex for RTL8922D - Intel: - new FW version support Bluetooth: - HCI: add support for Shorter Connection Interval (SCI) feature - af_bluetooth: add minimal context analysis annotations - Driver changes: - Intel: - add Bluetooth SAR revision 2 support - add vendor_reset PCI sysfs for PLDR - Mediatek: - add USB IDs for MT7902 and MT7922 devices - Realtek: - add USB IDs for 8761CU and 8852BE devices - NXP: - add M.2 Bluetooth device support using pwrseq Misc: - DPLL support for manual/numerical oscillator control (NCO) (implement in zl3073x) - MCTP support for MCTP over USB v1.1 (DMTF DSP0283) - Power-over-Ethernet: support Realtek PSE controllers - Remove the IBM EHEA driver - Remove tulip/xircom_cb driver" * tag 'net-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1433 commits) net/mlx5e: do not HW-GRO coalesce small frames net: openvswitch: fix nf_connlabels leak in ovs_ct_init net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs() net: openvswitch: fix flow mask use-after-free on flow deletion sctp: stop processing a packet once its association is deleted dpll: zl3073x: add PTP clock support dpll: zl3073x: add channel ToD, phase step and TIE operations dpll: zl3073x: scale poll interval proportionally to timeout ptp: vmclock: prevent read-only mappings from becoming writable ipv4: reject undersized MTUs in ip_do_fragment() bonding: initialize err for empty target lists net: dsa: initial support for MT7628 embedded switch net: dsa: initial MT7628 tagging driver net: phy: mediatek: add phy driver for MT7628 built-in Fast Ethernet PHYs dt-bindings: net: dsa: add MT7628 ESW net: pse-pd: realtek-pse-mcu: add UART transport net: pse-pd: realtek-pse-mcu: add I2C transport net: pse-pd: add Realtek PSE MCU core dt-bindings: net: pse-pd: add bindings for Realtek PSE MCU vsock: use sock_error() to consume sk_err after a failed connect ...
2026-08-20Merge tag 'bpf-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextLinus Torvalds272-3416/+18967
Pull bpf updates from Daniel Borkmann: "Major changes: - Redesign the verifier error reporting: failures now carry source and instruction annotations along with the causal event history that led to them, making program rejections far easier to debug and repair (Kumar Kartikeya Dwivedi) - Add arena argument support to kfuncs and struct_ops through the new __arena and __arena__nullable suffixes (Tejun Heo, Puranjay Mohan, Kumar Kartikeya Dwivedi, Ihor Solodrai) - Signed BPF program loader rework to accommodate both BPF and security community needs where the kernel runs the signature verification at BPF_PROG_LOAD time before the LSM admission hook (Daniel Borkmann) - Add a set of ksock kfuncs which let BPF LSM and syscall programs create, connect and send on UDP sockets in order to emit telemetry data (Mahe Tardy) - Unify helper and kfunc call argument verification and classify kfunc arguments purely from BTF into a generated bpf_func_proto which is computed once at add-call time (Amery Hung) Other features and fixes: - Enable EXECMEM_ROX_CACHE for BPF allocations on x86 (Mike Rapoport) - Add bidirectional VLAN support to bpf_fib_lookup() through the new BPF_FIB_LOOKUP_VLAN and BPF_FIB_LOOKUP_VLAN_INPUT flags (Avinash Duduskar) - Infer zext_dst from static register liveness analysis to fix 32-bit zero-extension semantics, and remove the artificial limitations on pointer types eligible for spilling (Eduard Zingerman) - Inline the numeric open-coded iterator kfuncs so that bpf_for() loops no longer pay a kfunc call on every iteration (Puranjay Mohan) - Add an arena-based bitmap data structure to libarena along with serial and parallel selftests (Emil Tsalapatis) - Teach resolve_btfids to discover kfuncs from the kernel's BTF ID sets and to emit kfunc BTF decl tags, reducing the kernel build's dependency on pahole features (Ihor Solodrai) - Add BPF_F_ADJ_ROOM_DECAP_* flags to bpf_skb_adjust_room() so that tunnel decapsulation can update the GSO and encapsulation state of the skb (Nick Hudson) - Fix the ring buffer pending_pos walk and the available-data accounting on 32-bit position wrap (Israel Téllez García) - Add memory usage accounting for arena maps and fix an mmap_lock deadlock on arena lock failure (Jiayuan Chen) - Add tracing_multi link info support to the kernel UAPI and bpftool, and refactor the stack map code to run with preemption disabled (Jiri Olsa) - Support BPF_F_EGRESS in bpf_redirect_peer() to emit the skb in the egress direction of the target's peer device (Jordan Rife) - Add a KF_SPINLOCK_SAFE kfunc flag so that providers, in particular modules, can declare kfuncs safe to call under bpf_spin_lock instead of relying on the verifier's hard-coded allowlist (Kaitao Cheng) - Introduce global percpu data for BPF programs with libbpf probing and bpftool skeleton support, and stop exposing uninitialized kernel heap memory when copying per-CPU map values (Leon Hwang) - Add s390 JIT support for load-acquire and store-release instructions (Maxim Khmelevskii) - Fix a CFI mismatch in the task work callback and an arm64 KASAN false positive after bpf_throw() (Mykyta Yatsenko) - Reject writes through untrusted BTF pointers and bound the rdonly/rdwr_buf_size kfunc arguments (Nicholas Dudar) - Invalidate RCU pointers only after the final spin unlock and account for preempt and IRQ disabled regions as overlapping RCU protection (Ning Ding) - Support mixing bpf2bpf calls and tail calls on RV64, add signed operations and 32-bit atomics to the RV32 JIT, and add timed may_goto support (Pu Lehui, Kuan-Wei Chiu, Feng Jiang) - Fix a use-after-free on mm_struct in bpf_find_vma() for foreign tasks and an mmap_lock leak in the irq_work path (Sanghyun Park) - Populate mmap-able BPF array map memory lazily which makes mmap() O(1) instead of proportional to the map size (Song Liu) - Introduce a jit_required flag and reject programs with inlined helpers when no JIT is available, where the interpreter would otherwise jump into an invalid address (Tiezhu Yang) - Fix the x86 JIT per-CPU address resolution into an extended register where the REX prefix dropped the high destination register bit (Vineet Gupta) - Reject MEM_ALLOC BTF accesses past object bounds, arena frees below the arena base, and mixed arena and ordinary atomic paths (Yiyang Chen) - Fix the trampoline handling of 128-bit arguments and of return values larger than 8 bytes (Yonghong Song) - Ensure that any fault prone load is rewritten with exception table handling, and fix the arena load-acquire and atomic fetch handling in the x86, arm64, riscv and s390 JITs (Daniel Borkmann) - Many more fixes and cleanups across the verifier, arena, trampolines, sockmap, cgroup, ring buffer, x86/arm64/riscv/s390 JITs, libbpf, bpftool, resolve_btfids and selftests" * tag 'bpf-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (373 commits) selftests/bpf: Add tests for a store on a fault prone qdisc pointer selftests/bpf: Add tests for fault prone loads out of RCU pointers selftests/bpf: Add tests for pointer type merge at a shared load selftests/bpf: Remove duplicate copies of the arena spinlock qnodes selftests/bpf: Retry stat generation in cgroup_iter_memcg selftests/bpf: Test pseudo-function policy diagnostics bpf: Distinguish function references in policy diagnostics bpf: Preserve source attribution without source text selftests/bpf: Test kfunc argument diagnostics bpf: Correct kfunc argument diagnostics bpf: Use canonical stack argument names in diagnostics bpf: Preserve R0 lineage across helper calls selftests/bpf: Exercise negative optlen in cgroup getsockopt hook bpf: Reject negative optlen in cgroup getsockopt hook selftests/bpf: tc_tunnel - validate decap GSO and encapsulation state bpf: Clear decap state on skb_adjust_room shrink path bpf: Allow new DECAP flags and add guard rails bpf: Add BPF_F_ADJ_ROOM_DECAP_* flags for tunnel decapsulation bpf: Refactor masks for ADJ_ROOM flags and encap validation bpf: Name the enum for BPF_FUNC_skb_adjust_room flags ...
2026-08-20MAINTAINERS: update ksmbd repository URLNamjae Jeon1-1/+1
Update the ksmbd repository URL to the kernel.org ksmbd-for-next branch. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20MAINTAINERS: add myself as KSMBD reviewerChenXiaoSong1-0/+2
I and my team have been working on KSMBD development, and I am also interested in helping maintain this code. Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20smb: server: remove unused DES crypto headerNamjae Jeon1-1/+0
The DES crypto header is no longer used after the removal of NTLMv1 authentication. Remove it now that the server no longer selects CRYPTO_LIB_DES. Fixes: ce812992f239 ("ksmbd: remove NTLMv1 authentication") Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20smb: server: Remove obsolete "select CRYPTO_LIB_DES" from Kconfig fileThomas Huth1-1/+0
The DES encryption in the smb server code has been removed in 2021 with the removal of the insecure NTLMv1 authentication code. Thus we don't need this "select" statement here anymore. Fixes: ce812992f239f ("ksmbd: remove NTLMv1 authentication") Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20ksmbd: keep TCP timers alive for kernel socketsNamjae Jeon1-0/+6
ksmbd creates its listening socket with sock_create_kern(). Kernel sockets do not hold a network namespace reference by default. Accepted sockets inherit this state. When an accepted socket is released, tcp_close() clears its pending TCP timers for a kernel socket after the socket enters an orphaned state. If the peer is unreachable while ksmbd sends a FIN, this can leave a FIN-WAIT-1 orphan without a retransmission timer. Upgrade the listening socket's network namespace reference before kernel_listen(). Accepted sockets inherit the reference, so the TCP stack can keep the retransmission timer active and apply its normal orphan retry policy. Preserve the existing graceful shutdown behavior. Link: https://github.com/openwrt/openwrt/issues/24744 Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20ksmbd: enable TCP keepalive for accepted connectionsNamjae Jeon1-0/+6
A client that disappears without sending a FIN or RST can leave its ksmbd connection in ESTABLISHED indefinitely. ksmbd sets a socket receive timeout, but the connection receive loop retries timeout errors without a limit, so the connection remains in conn_list and consumes the per-IP connection quota. Enable SO_KEEPALIVE on accepted TCP sockets so the TCP stack can detect a silent peer failure. The keepalive idle time, interval, and probe count remain controlled by the existing TCP sysctl settings. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20spi: loongson: pm: add .freeze .poweroff .thaw .restoreLi Jun1-4/+2
after execute s4, the spi error, [ 1104.754246][ 4] [ T1] tpm_tis_spi spi-SMO0768:00: SPI transfer failed: -110 [ 1104.761503][ 4] [ T1] spi_master spi1: failed to transfer one message from queue [ 1104.769201][ 4] [ T1] spi_master spi1: noqueue transfer failed [ 1104.776344][ 4] [ T1] tpm_tis_spi spi-SMO0768:00: SPI transfer failed: -110 [ 1104.783609][ 4] [ T1] spi_master spi1: failed to transfer one message from queue [ 1104.791308][ 4] [ T1] spi_master spi1: noqueue transfer failed [ 1104.797446][ 4] [ T1] gttadd tpm_chip_start1 ret = -110 and in s4 the loongson_spi_resume&suspend are not called at all. use DEFINE_SIMPLE_DEV_PM_OPS() add .freeze .poweroff .thaw .restore, after s4 the spi communication is normal. Signed-off-by: Li Jun <lijun01@kylinos.cn> Link: https://patch.msgid.link/20260820092351.101605-1-lijun01@kylinos.cn Signed-off-by: Mark Brown <broonie@kernel.org>
2026-08-20spi: amlogic-spisg: Make sure clk_init_data is fully initializedGeert Uytterhoeven1-1/+1
The clk_init_data structure contains several mutually-exclusive members for different methods to specify the possible parents of a clock, prompting drivers to initialize only the members they need. However, not initializing all members may cause subtle issues, which are only exposed when CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE is enabled. aml_spisg_clk_init() fills in init.parent_data, and assumes that init.parent_names is NULL. However, the latter in uninitialized, and thus may cause a crash. Make sure all members are fully initialized, to fix such bugs, and to avoid future breakage when converting drivers to a different method for specifying the parents. Fixes: cef9991e04aed330 ("spi: Add Amlogic SPISG driver") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Brian Masney <bmasney@redhat.com> Reviewed-by: Xianwei Zhao <xianwei.zhao@amlogic.com> Link: https://patch.msgid.link/9fb35ae0aedb7a6db0db6c78a8193c7602dd9d44.1787165329.git.geert+renesas@glider.be Signed-off-by: Mark Brown <broonie@kernel.org>
2026-08-20efivarfs: Rate limit statfs() handlerArd Biesheuvel1-6/+24
Ravi reports that statfs() may be called by unprivileged users on the efivarfs mount point, which may result in a flood of calls to the QueryVariableInfo() runtime service. These calls are disproportionately costly on x86 systems where the variable store is backed by SMM, as each SMM entry requires a rendez-vous of all the CPUs. So rate limit the calls to QueryVariableInfo() at twice per second, and return the most recently obtained value for calls that are elided. Cc: <stable@vger.kernel.org> Reported-by: Ravi Bangoria <ravi.bangoria@amd.com> Fixes: d86ff3333cb1 ("efivarfs: expose used and total size") Reviewed-by: Anisse Astier <anisse@astier.eu> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi: apple-properties: validate setup data header lengthPengpeng Hou1-1/+4
map_properties() remaps the Apple properties setup_data payload and then reads the properties header fields. Reject a truncated payload before checking the header version and length fields. Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn> Reviewed-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi: make efi_guid_to_str() take a const GUID pointerVincent Mailhol1-1/+1
efi_guid_to_str() only formats the GUID through the byte array passed to the UUID printf formatter. It does not modify the GUID contents. Make the input pointer const so callers can stringify GUIDs from const data without a cast. Signed-off-by: Vincent Mailhol <mailhol@kernel.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20RDMA/ucma: Allow path records to exactly fit the output bufferSerhat Kumral1-1/+1
ucma_query_path() emits a path record only when the remaining output buffer is strictly larger than struct ib_path_rec_data. A buffer sized exactly for the response header and N complete records therefore gets only N - 1 records, while resp->num_paths still advertises N. A caller sizing its buffer for a single record gets a header claiming one path and no path data at all. ucma_query_ib_service() in the same file computes the record count with a plain division and so accepts an exact fit; make ucma_query_path() behave the same way. Current librdmacm is unaffected because it always sizes the response for six records while the kernel currently reports at most two paths. Other users of the UAPI that provide an exactly sized buffer can observe the truncated response. Fixes: ac53b264b2f3 ("RDMA/ucma: Support querying when IB paths are not reversible") Signed-off-by: Serhat Kumral <serhatkumral1@gmail.com> Link: https://patch.msgid.link/20260806201358.147478-1-serhatkumral1@gmail.com Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2026-08-20efi/runtime-wrappers: retire the worker if a wedged call ever returnsBreno Leitao1-0/+3
When __efi_queue_work() times out it disables runtime services and returns, but the kworker is still blocked inside firmware. If the firmware eventually unblocks, efi_call_rts() would run its tail on an efi_rts_work that the timed-out caller has long abandoned: signalling a stale completion and clearing efi_runtime_lock_owner that may by then belong to another caller. If runtime services have been disabled by the time the call returns, park the worker with efi_rts_park_worker() instead, so it never touches efi_rts_work again or returns to the workqueue. Suggested-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi/runtime-wrappers: honour EFI_RUNTIME_SERVICES in the non-blocking pathsBreno Leitao1-0/+16
Three wrappers call firmware directly instead of going through __efi_queue_work(), and none of them check whether runtime services are still enabled: virt_efi_set_variable_nb(), virt_efi_query_variable_info_nb() and virt_efi_reset_system(). Once a hang has cleared EFI_RUNTIME_SERVICES - or efi_recover_from_page_fault() has cleared it on a firmware page fault - these paths still enter the (possibly wedged) firmware, e.g. an EFI pstore write through the non-blocking SetVariable() variant, in violation of UEFI's non-reentrancy rules. reset_system() is reachable too: efi_reboot() only gates it on the static efi_rt_services_supported() mask, which does not track the runtime disable. Check efi_enabled(EFI_RUNTIME_SERVICES) in each before calling into firmware. Test it after taking efi_runtime_lock rather than before: the bit is only ever cleared at runtime while that lock is held, so checking it under the lock avoids racing with a concurrent timeout that clears the bit and drops the lock. Suggested-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi/runtime-wrappers: bound the wait for EFI runtime service callsBreno Leitao1-1/+18
When an EFI runtime service hangs in firmware, the efi_rts_wq worker is stuck inside the call and cannot be cancelled. __efi_queue_work() then waits on the completion forever while holding efi_runtime_lock, so every later EFI caller is wedged until reboot; the only symptom is a "workqueue lockup" and tasks piling up on the semaphore. Replace wait_for_completion() with wait_for_completion_timeout() bounded by EFI_RTS_TIMEOUT (120 seconds). On timeout, clear EFI_RUNTIME_SERVICES and return EFI_ABORTED so later callers fail fast at the entry check instead of each paying another 120 seconds. The wedged worker is intentionally leaked and keeps ownership of efi_rts_work. A worker that only starts running after the timeout would otherwise dereference efi_rts_work.args, now pointing into the caller's freed stack frame, and hand stale pointers to firmware. Park it with efi_rts_park_worker() at the entry of efi_call_rts() when runtime services are already disabled, before it touches args or enters firmware. Known limitation: a worker already inside firmware when the timeout fires still holds efi_rts_args pointing into the caller's stack frame; if firmware unblocks afterwards and writes the output buffers, they land in reused memory. Firmware hung this long rarely recovers; a follow-up could bounce the buffers through kmalloc. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi/runtime-wrappers: check EFI_RUNTIME_SERVICES before using efi_rts_workBreno Leitao1-6/+5
Move the EFI_RUNTIME_SERVICES check to the top of __efi_queue_work() and return directly, so a caller that finds runtime services disabled returns without touching the shared efi_rts_work. No functional change. This prepares for bounding the wait, where a timeout will clear EFI_RUNTIME_SERVICES while the leaked worker still owns efi_rts_work; a later caller must then bail out before reinitialising it. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi/runtime-wrappers: handle queue_work() failure with goto exitBreno Leitao1-3/+5
Convert the queue_work() failure path in __efi_queue_work() to a goto exit instead of falling through to the wait and the WARN_ON_ONCE(status == EFI_ABORTED) below it. A failed queue_work() leaves the status at its initial EFI_ABORTED, so that warning would fire even though no call ran; it is meant for a completed call that returned EFI_ABORTED. No change for the common (successful enqueue) path. This also prepares __efi_queue_work() for the timeout handling added later. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20efi/runtime-wrappers: factor out efi_rts_park_worker()Breno Leitao4-9/+18
x86's efi_crash_gracefully_on_page_fault() ends in an infinite schedule() loop so the kworker that faulted in firmware never runs efi_rts_wq again. A later change needs the same "park this worker forever" primitive on the runtime service timeout path, so factor the loop into a shared efi_rts_park_worker() and call it from the x86 page-fault handler. No functional change. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2026-08-20ntfs: reject invalid empty mapping pairsHyunchul Lee1-0/+19
Reject an attribute with empty mapping pairs if it has inconsistent highest VCN and size. Fixes: 11ccc9107dc4 ("ntfs: update runlist handling and cluster allocator") Reported-by: Robert Morris <rtm@csail.mit.edu> Closes: https://lore.kernel.org/all/9519.1786907182@localhost/ Cc: stable@vger.kernel.org Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20ntfs: fix resource leak in ntfs_new_attr_flagsHongling Zeng1-2/+4
When handling resident attributes that don't need sparse/compressed changes, ntfs_new_attr_flags() returns 0 directly at line 678 without calling unmap_mft_record() or ntfs_attr_put_search_ctx(). This leaks the MFT record mapping and attribute search context. An unprivileged user can cause a denial of service by repeatedly calling setxattr(2) with system.ntfs_attrib on files with resident attributes, eventually exhausting kernel memory. Fix by replacing the direct return with goto err_out to ensure proper cleanup of resources via the existing cleanup code. Fixes: e791930240a5 ("ntfs: fix resident conversion in ntfs_new_attr_flags") Cc: stable@vger.kernel.org Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20ntfs: validate usa_ofs before preserving the update sequence numberDennis Tighe1-1/+11
When ntfs_mft_record_alloc() reuses a free mft record it reads the old update sequence number straight from the on-disk record: usn = *(__le16 *)((u8 *)m + le16_to_cpu(m->usa_ofs)); Here m points into the raw $MFT page-cache folio, which still holds unvalidated, MST-protected bytes: the folio is read by a plain iomap_read_folio() and neither post_read_mst_fixup() nor ntfs_mft_record_check() has run on it (both work on private copies). m->usa_ofs is therefore an untrusted u16, and a corrupted record can put it past the end of the record so the two-byte read lands outside the folio. Reading such a record while creating a file gives, under KASAN: BUG: KASAN: use-after-free in ntfs_mft_record_alloc+... Read of size 2 at addr ... ntfs_mft_record_alloc -> __ntfs_create -> ntfs_create -> path_openat Only preserve the old update sequence number when usa_ofs is even and in range, mirroring the check ntfs_mft_record_check() already applies; otherwise leave usn zero, which the existing restore below skips. Fixes: 495e90fa3348 ("ntfs: update attrib operations") Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Dennis Tighe <dennis.tighe@gmail.com> Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2026-08-20ntfs: fix off-by-one page overflow in ntfs_decompress()Dennis Tighe1-1/+1
The per-token range check in ntfs_decompress() uses if (cb >= cb_sb_end || dp_addr > dp_sb_end) break; so dp_addr == dp_sb_end falls through to the symbol copy `*dp_addr++ = *cb++`, writing one byte past the destination page. Since NTFS_SB_SIZE == PAGE_SIZE the destination is a single page, so the byte lands in the adjacent page, and *dest_ofs is left one past the sub-block end (the later `*dest_ofs &= ~PAGE_MASK` then yields 1, not 0, so the page is never finalized and later sub-blocks keep writing further past it). A corrupted compressed $DATA attribute thus produces a bounded run of out-of-bounds writes when the file is read. Break as soon as dp_addr reaches dp_sb_end; a full sub-block still completes, as its final copy advances dp_addr to exactly dp_sb_end. Fixes: 1e9ea7e04472 ("Revert "fs: Remove NTFS classic"") Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Dennis Tighe <dennis.tighe@gmail.com> Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>