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Use kvm_test_request() instead of kvm_check_request() when querying
KVM_REQ_VM_DEAD, i.e. don't clear KVM_REQ_VM_DEAD, as the entire purpose
of KVM_REQ_VM_DEAD is to prevent the vCPU from enterring the guest ever
again, even if userspace insists on redoing KVM_RUN.
Ensuring KVM_REQ_VM_DEAD is never cleared will allow relaxing KVM's rule
that ioctls can't be invoked on dead VMs, to only disallow ioctls if the
VM is bugged, i.e. if KVM hit a KVM_BUG_ON().
Opportunistically add compile-time assertions to guard against clearing
KVM_REQ_VM_DEAD through the standard APIs.
Reviewed-by: Kai Huang <kai.huang@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://patch.msgid.link/20260806214618.82180-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
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Correct "preceeded" to "Preceded", reported by scripts/checkpatch.pl using
the misspelling list in scripts/spelling.txt. Only touches comments, no
code changes.
Link: https://patch.msgid.link/20260907065607.36615-1-hemanth.selam@gmail.com
Assisted-by: Cursor:claude-opus-5
Signed-off-by: Hemanth Selam <hemanth.selam@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Pull media fixes from Mauro Carvalho Chehab:
"Core:
- add bounded tile-count helpers for HEVC stateless decoders
- validate AV1 tile counts fits in array size
- validate HEVC tile counts fits in array size
- fix memcmp() size in B1 reference list comparison
mediatek:
- bound AV1 tile-start copy to fit in array size
rockchip:
- reject AV1 frames exceeding the tile size
- guard VPU981 AV1 divisor and tile buffer
hantro and rkvdec:
- bound G2 HEVC tile loops and PPS id to the buffer size
rppx1:
- read the raw pattern from the PRE2 acquisition module
- describe the MAIN_POST white balance gains block"
* tag 'media/v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
media: mediatek: vcodec: bound AV1 tile-start copy to the array capacity
media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity
media: verisilicon: rockchip: guard VPU981 AV1 divisor and tile buffer
media: verisilicon: hantro: bound G2 HEVC tile loop to the buffer capacity
media: rkvdec: bound HEVC tile loops and PPS id to the array capacity
media: hevc: add bounded tile-count helpers
media: v4l2-ctrls: validate AV1 tile counts
media: v4l2-ctrls: validate HEVC tile counts
media: v4l2-h264: Fix memcmp() size in B1 reference list comparison
media: rppx1: bls: read the raw pattern from the PRE2 acquisition module
media: rppx1: describe the MAIN_POST white balance gains block
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Johan writes:
USB serial fixes for 7.3-rc3
Here is a fix for a long-standing ioctl-hangup race and a couple of
fixes for port lifetime issues that can lead to NULL-pointer
dereferences when disconnecting devices or deregistering drivers.
Included are also a fix for a related dynamic id leak and some new modem
device ids.
All have been in linux-next with no reported issues.
* tag 'usb-serial-7.3-rc3' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
USB: serial: fix ioctl hangup race
USB: serial: use iterator for driver deregistration
USB: serial: fix driver deregistration order
USB: serial: fix dynamic id driver deregistration race
USB: serial: fix port tear down use-after-free
USB: serial: option: add Compal EXC-T1 support
USB: serial: option: add Quectel RG660QB
USB: serial: option: add Compal EXM-G1x support
USB: serial: option: add support for SIMCom SIM8260C
USB: serial: option: add Quectel EG060W
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Tracing related BPF helpers e.g. under bpf_base_func_proto() are gated
behind CAP_PERFMON. However, the same is currently not true for kfuncs
and they are accessible via plain CAP_BPF. Add a new KF_PERFMON flag
which can be used such that check_kfunc_call() ensures env->allow_ptr_leaks
is permitted. This follows similar pattern to existing KF_DESTRUCTIVE flag.
The rejection returns -EPERM to match the other CAP_PERFMON gates in the
verifier, that is, check_ptr_to_btf_access() and check_ptr_to_map_access(),
which report the very same policy to user space.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20260910213510.49358-1-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Pull networking fixes from Jakub Kicinski:
"Nothing too exciting, usual stream of fixes. Including fixes from
Netfilter, Bluetooth and WPAN.
Current release - new code bugs:
- Bluetooth: hci_sync: fix not setting CE length properly
- eth: enic: match mailbox replies to request numbers
Previous releases - regressions:
- tunnels: drop stale dst when building an ICMP error for PMTUD
- ipv6: null-check fib6_node before accessing in __ip6_del_rt_siblings()
(bug in the rtnl_lock -> RCU conversion)
- eth: bnxt_en:
- fix crashes on Thor2 due to OOB coalescing buffer accesses
- prevent queue stop with deferred completions
Previous releases - always broken:
- eth:
- ice: don't dereference pointers from TP_printk()
- fix OOB writes on ethtool flow rule dump in 3 drivers
- mlx5: fix FEC configuration with RS_544_514_INTERLEAVED_QUAD
- dsa: tag_brcm: legacy FCS: request needed tailroom
Misc:
- net: cap tx_queue_len at S16_MAX to prevent oversized ring alloc
- ipv6: flowlabel: cap duplicate leases per socket"
* tag 'net-7.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (164 commits)
selftests: tc-testing: test action batch failure cleanup
net/sched: act_api: release all action references on NEWACTION failure
openvswitch: fix wrong flag value in get_ipv6_ext_hdrs()
ipmr: account multicast table and route memory
net: phy: dp83td510: handle the active-high LED polarity mode
net: macb: initialize PTP state before registering clock
net: hsr: enable promiscuous mode on interlink port with fwd offload
ipv6: fix fib6 walker UAF on seq stop
net: stmmac: fix TX descriptor availability check for TSO traffic
net/rds: fix tcp stream corruption with large pages
net: mana: restore the XDP program pointer when pre-allocation fails
net: phy: dp83867: handle the active-high LED polarity mode
octeontx2-af: fix PF/CGX debugfs PCI bus lookup
net: net_failover: Fix the deadlock in net_failover_slave_name_change()
net: phy: mediatek-ge: disable EEE on the MT7530 PHY
tcp: reject non zerocopy devmem tx
net: ethernet: mtk_eth_soc: populate lpi_interfaces to fix EEE support
net: dsa: mt7530: populate lpi_interfaces to fix EEE support
net: hinic: fix mailbox segment buffer overflow
net: sun4i-emac: fix missing of_node_put() for phy_node
...
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The eevdf rb tree maintains 3 augmented fields but only one is currently
copied when balancing the tree.
Add a more generic define that can be used when there are several augmented
fields. In this case, we provide a function that takes care of copying all
fields.
Fixes: aef6987d8954 ("sched/eevdf: Propagate min_slice up the cgroup hierarchy")
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://patch.msgid.link/20260909150522.858312-1-vincent.guittot@linaro.org
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struct power_supply_maintenance_charge_table contains
charge_safety_timer_minutes, but its kernel-doc describes
safety_timer_minutes. This leaves the real member undescribed and adds a
nonexistent member to the generated documentation.
Use the member's actual name.
Fixes: d72ce7d32478 ("power: supply: ab8500: Standardize maintenance charging")
Assisted-by: LLM
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Link: https://patch.msgid.link/20260909064623.90737-1-kmehltretter@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
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Pull Landlock fixes from Mickaël Salaün:
"This fixes a use-after-free and a lockdep assert NULL dereferencing,
and properly truncates too-long strings printed by a Landlock
tracepoint. Most of the changes are brought by new tests"
* tag 'landlock-7.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
landlock: Test trace path output boundaries
landlock: Bound escaped trace path output
landlock: Clean up ruleset validation checks
selftests/landlock: Test abstract socket trace name limits
landlock: Fix use-after-free of the source's parent directory
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Pull vfs fixes from Christian Brauner:
- netfs:
- Fix an uninitialized return value in netfs_unbuffered_write()
when preparing the first subrequest fails
- For partial unbuffered/DIO writes return the amount transferred
rather than an error
- Update i_size with the amount actually written when a partial
transfer ends in an error
- Fix a subrequest reference leak when the io_iter ends up empty
- Handle netfs_alloc_subrequest() failure during unbuffered writes
- Load all readahead folios into the rolling buffer upfront and
drop the readahead references once the first subrequest is
dispatched
- Mark folios for copy-to-cache while issuing subrequests
- Fix read progress reporting
- afs:
- Add the missing kunmap in the error path of afs_dir_search_bucket()
- Fix a double kunmap in afs_edit_dir_remove()
- Don't free an existing server's endpoint state when cleaning up a
candidate server in afs_lookup_server()
- Unbind peers removed from a server's address list
- ufs:
- Load the cylinder group metadata before creating the root dentry
- Validate the cylinder group index and rotor positions before
caching them
- Treat an unreadable directory block as not empty
- exec:
- Close the close-on-exec files before taking exec_update_lock
Closing a file can block on the filesystem, so a hung filesystem
blocked everything that takes exec_update_lock and a FUSE server
inspecting the calling process could deadlock
- Drop the bprm loader before closing bprm->file in free_bprm()
- exit: Hold a reference to thread_pid across proc_flush_pid()
- reboot: Fix a use-after-free on cad_pid
- nsfs: Keep the namespace tree fields out of the rcu_head used by
kfree_rcu()
- nstree: Check listing permission before taking a namespace
reference in listns()
- super: Return 0 when a nested thaw drops its hold while other
freezers remain
- ext4: Don't set I_METADATA_WRITEBACK during fastcommit replay
- adfs: Free s_fs_info in ->kill_sb()
- autofs: Free the inode info allocated in autofs_fill_super() when
the root inode allocation fails
- ovl: Return EINVAL instead of EIO on a user namespace mismatch now
that it's a plain refusal and not an internal error
- cachefiles: Don't cast the variable-length coherency data to a
__be64 in the coherency tracepoint
* tag 'vfs-7.3-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (28 commits)
nstree: check listing permission before taking a namespace reference
exec: do_close_on_exec() before taking exec_update_lock
exit: hold a reference to thread_pid across proc_flush_pid
fs: autofs: fix memory leak in autofs_fill_super()
exec: Drop bprm loader before closing bprm->file
afs: Clear stale peer app data after address list changes
afs: Fix incorrect free in candidate cleanup in afs_lookup_server()
afs: Fix double-unmap of directory block
afs: Fix missing kunmap in afs_dir_search_bucket()
ovl: return EINVAL instead of EIO in case of mismatched user_ns
reboot: fix cad_pid use-after-free race
cachefiles: Fix potential UAF/KASAN warning
netfs: Fix read progress reporting
netfs: Mark folios with COPY_TO_CACHE whilst issuing subreqs
netfs: Fix readahead synchronisation issues by loading all folios upfront
netfs: break unbuffered write when netfs_alloc_subrequest() fails
netfs: Fix subreq ref leak
netfs: Fix i_size update for partial transfer
netfs: Fix error vs transferred passed to ->ki_complete()
netfs: Fix unbuffered/DIO write partial transfer error return
...
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Pull printk fixes from Petr Mladek:
- Use lazy irq_work for waking printk kthreads
- Flush pending irq_work before destroying printk kthreads
- Remove redundant WARN() when a printk kthread can't be created
- Typo fix
* tag 'printk-for-7.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
printk/nbcon: Change nbcon_irq_work to IRQ_WORK_LAZY
printk/nbcon: Flush nbcon_irq_work in nbcon_free()
console: fix /dev/kmsg reference in flags kernel doc
printk: Don't WARN on kthread_run failure.
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Frames injected on a monitor interface can carry a radiotap
field requesting a bandwidth, which mac80211 passes down to
the driver regardless of the the actual operational bandwidth.
If the bandwidth requested is too wide, that triggers a warning
in hwsim:
WARN_ON(hwsim_get_chanwidth(bw) > hwsim_get_chanwidth(confbw))
Drop such frames entirely instead since they cannot be sent.
Assisted-by: LLM
Fixes: 646e76bb5daf ("mac80211: parse VHT info in injected frames")
Reported-by: syzbot+435fdb053cf98bfa5778@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=435fdb053cf98bfa5778
Link: https://patch.msgid.link/20260908122838.201719-13-johannes@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Mika writes:
thunderbolt: Fixes for v7.3-rc3
This includes following USB4/Thunderbolt fixes:
- Fix various issues around asynchronous DisplayPort tunnel activation
when there is no graphics driver doing doing the capability
exchange.
- Fix potential NULL pointer dereference when XDomain connection is
removed.
- Fix use-after-free when control channel request is canceled.
- Fix lockdep false positive.
- Revert a commit that causes XDomain properties ping-pong.
All these have been in linux-next with no reported issues.
* tag 'thunderbolt-for-v7.3-rc3' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt:
Revert "thunderbolt: xdomain: Notify peers after enumeration"
thunderbolt: Use separate lock class for each ring
thunderbolt: Fix KASAN reported use-after-free when request is canceled
thunderbolt: Fix NULL dereference in tb_remove_work()
thunderbolt: Tear down inactive DP tunnels when the domain is stopped
thunderbolt: Mark discovered tunnels as active
thunderbolt: Don't access a DP tunnel after its DPRX read was canceled
thunderbolt: Fix domain reference leak when DPRX read is canceled
thunderbolt: Make the DP tunnel activation callback mandatory
thunderbolt: Hold a router reference for each allocated HopID
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dma_alloc_attrs() passes *dma_handle to trace_dma_alloc() without
checking whether the allocation succeeded. No backend writes it on
failure: dma_direct_alloc(), iommu_dma_alloc() and the dma_map_ops
instances assign it only on the path that returns a buffer. Callers
usually pass an uninitialized automatic variable, so a failed allocation
records whatever the stack held, next to the virt_addr=(null) that marks
the record as an error:
dma_alloc: dmatrace dir=BIDIRECTIONAL dma_addr=deadbeefdeadbeef
size=1099511627776 virt_addr=0000000000000000
The device coherent pool path reaches the same call: a non-zero return
from dma_alloc_from_dev_coherent() means the request was handled, not
that it succeeded, so cpu_addr is NULL and dma_handle is untouched once
the pool runs out.
For an allocation event a NULL virt_addr already means the request
failed, so the address field carries nothing. Report 0 for it in the
event class rather than at each call site, which covers dma_alloc_pages()
and dma_alloc_sgt_err() as well.
Fixes: 038eb433dc14 ("dma-mapping: add tracing for dma-mapping API calls")
Fixes: 68b6dbf1f441 ("dma-mapping: trace more error paths")
Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
Link: https://lore.kernel.org/r/20260907120124.603373-1-donggeunyoo.kernel@gmail.com
Reviewed-by: Sean Anderson <sean.anderson@linux.dev>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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x86 implements page attribute modification using its Change Page
Attributes (CPA) mechanism.
This tracks properties of ranges such as cache mode through x86 page
attributes, and as part of that logic manipulates kernel page tables.
Since commit:
41d88484c71c ("x86/mm/pat: restore large ROX pages after fragmentation")
ranges of kernel page table entries can be collapsed into
huge page table entries as part of this logic.
As part of this collapse, it frees the page tables which the collapsed
entries previously pointed to, and it does so without any relevant locks
being held to preclude concurrent kernel page table walkers.
The only way this code can be reached is if CPA_COLLAPSE is specified, and
this is only set in set_memory_rox() via:
set_memory_rox()
-> change_page_attr_set_clr()
-> cpa_flush()
-> cpa_collapse_large_pages()
Notable users of this are execmem and BPF when manipulating executable
mappings.
However, this is problematic for ptdump as it walks ranges it does not own
and thus runs the risk of a use-after-free on page tables freed underneath
it.
In addition, concurrent CPA collapse operations are possible which can also
cause races.
Resolve the issue by acquiring the mmap write lock on init_mm across the
whole operation.
It is safe to acquire a sleeping lock as all the callers invoke
set_memory_rox() from process context and in any case,
change_page_attr_set_clr() calls vm_unmap_alias() which ultimately takes a
mutex, disallowing atomic context here.
Fixes: 41d88484c71c ("x86/mm/pat: restore large ROX pages after fragmentation")
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Will Deacon <will@kernel.org>
Reviewed-by: David Carlier <devnexen@gmail.com>
Tested-by: Atish Patra <atishp@meta.com>
Tested-by: Nikunj A Dadhania <nikunj@amd.com>
Cc:stable@vger.kernel.org
Link: https://patch.msgid.link/20260813-cpa-fixes-v2-1-39b4ff90f91d@kernel.org
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Pablo Neira Ayuso says:
====================
Netfilter/IPVS fixes for net
The following patchset contains Netfilter/IPVS fixes for net:
1) Reject malformed messages in IPVS sync, from Kyle Zeng.
2) Fix possible stale infoleak in IPVS sync, also from Kyle Zeng.
3) Out-of-bound read in the SIP conntrack helper, from
Joas Antonio dos Santos.
4) UaF on cttimeout module removal, from Chengfeng Ye.
5) Unregister nf_loggers before netns teardown to fix UaF,
also from Chengfeng Ye.
6) Fix race in nfnetlink_log due to concurrent instance destruction,
from Florian Westphal.
7) Remove arp_table 32bit compat interface, this is already off in
many distributions, from Florian Westphal.
8) Set IP6T_F_PROTO flag is e->ipv6.proto is set on to deal with
insufficient validation of xtables extensions when used from
legacy ip6tables, from Florian.
9) Set on the NLM_F_DUMP_FILTERED flag when all is filtering out
in ctnetlink, from Ilya Maximets.
* tag 'nf-26-09-07' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
netfilter: report NLM_F_DUMP_FILTERED when all is filtered out
netfilter: ip6_tables: set F_PROTO when proto value is nonzero
netfilter: arp_tables: remove the 32bit compat interface
netfilter: nfnetlink_log: cope with concurrent instance destruction
netfilter: nf_log: unregister loggers before per-net teardown
netfilter: cttimeout: prevent UAF during module unload
netfilter: nf_conntrack_sip: fix OOB read in sip_skip_whitespace()
ipvs: fix reversed sequence option serialization
ipvs: reject invalid states in connection template sync records
====================
Link: https://patch.msgid.link/20260907171732.1407739-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Filesystem paths may expand fourfold when trace text escapes spaces and
other untrusted bytes. A sufficiently long representation can exhaust
the shared scratch sequence. A sibling __print_flags() helper may then
return an unterminated one-past pointer because TP_printk() argument
ordering is unspecified.
Use a fixed budget rather than the scratch space available at call time,
so output does not vary with sibling evaluation order. Limit an
untrusted string to three quarters of the trace sequence, leaving the
rest for sibling helpers and final event metadata. Compute and commit
complete escaped output transactionally so an exact fill cannot consume
the terminating NUL or poison the scratch sequence.
For strings that exceed the limit, retain the largest prefix ending at a
complete escape unit, then append a raw UTF-8 ellipsis. Keep the
helper's existing octal fallback so complete values remain unchanged.
Hex fallback would consume the same four bytes per escaped byte without
increasing the prefix or strengthening the marker. ESCAPE_NAP renders
every non-ASCII input byte in octal, so legitimate data cannot reproduce
the marker without being escaped.
Cc: Günther Noack <gnoack@google.com>
Link: https://patch.msgid.link/20260907154401.124362-1-mic@digikod.net
Signed-off-by: Mickaël Salaün <mic@digikod.net>
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USB serial driver modules register one driver for the USB bus and one or
more drivers for the ports on the USB serial bus.
When unloading a driver module, the USB driver must be deregistered
before the USB serial bus drivers so that I/O is stopped before
unbinding the ports to avoid use-after-free in completion handlers
accessing port data.
Note that the "new_id" attributes must first be removed to prevent new
ids from being added and triggering a probe of the USB driver after it
has been deregistered.
Fixes: 765e0ba62613 ("usb-serial: new API for driver registration")
Cc: stable@vger.kernel.org # 3.4
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>
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Commit 427faee167bc ("net: ipv6: introduce ip6_dst_mtu_maybe_forward")
dropped the IP6_MAX_MTU clamp that used to be present in ip6_mtu(). A
similar IPv4 commit ac6627a28dbf ("net: ipv4: Consolidate ipv4_mtu and
ip_dst_mtu_maybe_forward") preserves the IP_MAX_MTU clamp.
Restore the upper bound in the IPv6 flow to avoid potential 16-bit
overflows in forwarding paths.
Fixes: 427faee167bc ("net: ipv6: introduce ip6_dst_mtu_maybe_forward")
Signed-off-by: Alice Mikityanska <alice@isovalent.com>
Suggested-by: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260901195714.673548-5-alice.kernel@fastmail.im
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This feature is required to use 32bit arptables binary on 64bit kernels.
It's already off in many distributions including Debian and Fedora for
many years.
Zap arptables first, it's the most esoteric of the 4 flavors.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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A bunch of older cross compilers notably RISCV64 and S390 fail to eliminate
the dead code when CONFIG_AUDITSYSCALL=n. The code in question is:
if (unlikely(audit_context())
syscall_enter_audit(regs);
and in case of CONFIG_AUDITSYSCALL=n:
static inline struct audit_context *audit_context(void)
{
return NULL;
}
which should make the compiler eliminate the syscall_enter_audit()
call. But a RISV64 GCC12 cross compiler translates that into:
if (unlikely(audit_context()))
1c34: 00000097 auipc ra,0x0
1c38: 000080e7 jalr ra # 1c34 <.L785>
1c3c: c511 beqz a0,1c48 <.L787>
syscall_enter_audit(regs);
1c3e: 8526 mv a0,s1
1c40: 00000097 auipc ra,0x0
1c44: 000080e7 jalr ra # 1c40 <.L785+0xc>
and then claims in the failing link:
include/asm-generic/preempt.h:54:(.noinstr.text+0x1a20):
undefined reference to 'syscall_enter_audit'
which is obviously hallucination.
Add an explicit IS_ENABLED(CONFIG_AUDITSYSCALL) check into the condition to
cure this compiler madness.
Fixes: 6f25517010dd ("entry: Rework syscall_audit_enter()")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/87tso45bqq.ffs@fw13
Closes: https://lore.kernel.org/oe-kbuild-all/202609031938.ZvZZaRQy-lkp@intel.com/
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The stateless HEVC decoders compute the number of tile columns and rows
from num_tile_columns_minus1 / num_tile_rows_minus1 and clamp it to the
column_width_minus1[] / row_height_minus1[] capacity before using it as a
loop bound. Add shared helpers in a new <media/v4l2-hevc.h> so the rkvdec
and hantro drivers do not each open-code the min_t() clamp.
Signed-off-by: Michael Bommarito <michael.bommarito@gmail.com>
Assisted-by: Claude:claude-opus-4-8
Fixes: 256fa3920874 ("media: v4l: Add definitions for HEVC stateless decoding")
Cc: stable@vger.kernel.org
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
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Pull tracing fixes from Steven Rostedt:
- Fix several tracefs files that did not take the trace_array reference
A trace instance can be created and destroyed in the tracefs
"instances" directory via mkdir and rmdir respectively. The instance
is represented by a trace_array descriptor.
Most tracefs files pass the trace_array as the private data of the
inode to the open/read/write functions. Since there is no locking
between the time a task opens a file and the deletion of the instance
(and the freeing of the trace_array), each open needs to get a
reference to the trace_array and each close must remove it.
An instance can't be removed if there's any reference taken on its
trace_array. The open function uses trace_array_get() that takes a
lock (preventing removal of instances) and iterates the list of all
existing trace_arrays and if it finds a match, it takes the reference
and releases the lock. If it doesn't find a match, it causes the open
to return -ENODEV.
There were some added files that did not take the trace_array
reference on open that needed to be fixed. Sashiko also correctly
pointed out that there were some files that took an address of an
field or element of the trace_array which had a pointer back to the
trace_array to take its reference on open. But this leaves a slight
race between referencing this element to get the trace_array as the
element itself could be freed. To solve this, some helper functions
were created to look for trace_arrays with this field or element in
the search so that the element did not have to be dereferenced before
the trace_array's reference was taken.
- Add a lock around ftrace_ops initialization
When a ftrace_ops is first used by ftrace, some internal
initialization is performed on the ops. But if multiple tasks were
calling functions that did this initialization, it could race and
perform doing the initialization more than once, corrupting the
internal data. Add a lock in the initialization code to prevent this
from happening.
- Fix splice reads on mmapped buffers
The logic in the ring buffer splice code for mmapped buffers is
supposed to do a copy of the memory as the mapped buffers can't be
given to splice. But there was an if statement within the copy code
that would return a -1 if a request for a full page was done and it
wasn't a partial read. This is because this logic was written before
mmapped buffers existed and this case didn't make sense at the time.
For mmapped buffers it makes perfect sense and by returning early can
drop a lot of pages unnecessarily.
- Have the persistent ring buffer validation check nr_subbufs
Sashiko reported that the validation code was relying on the saved
nr_subbufs to match the calculated nr_pages + 1 and if they were off,
that the code could cause corruption. Sashiko is correct, and the
saved nr_subbufs should be validated before assuming it is correct.
- Do not allow more than one instance with the same name on cmdline
If an admin were to add more than one trace instances with the same
name they all would be created, but only the first one would be
accessible via tracefs. This used to not be allowed but some
restructuring of code has since made it possible.
- Fix the race between subbuf resize and trace_pipe_raw readers
If a task was reading trace_pipe_raw while another task was changing
the ring buffer subbuf size, it could crash the reader. The
trace_pipe_raw readers do get their own copy of the page from the
buffer, but the code needs some restructuring to not have the resize
of the subbuffers cause issues.
- Cap the size of the mapped (static) ring buffer nr_pages
The meta data used for ring buffer mapped buffers is 32 bit in size.
A normal ring buffer could (in theory) have more than 4 billion
pages. But this is not allowed by mapped buffers, so enforce it.
* tag 'trace-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
ring-buffer: Use a macro for static buffer bits
tracing: Fix comment in tracing_buffers_splice_read()
ring-buffer: Prevent truncation of nr_pages / nr_subbufs
ring-buffer: Cap static ring buffer nr_pages
tracing: Fix subbuf resize races with trace_pipe_raw readers
tracing: Fix to avoid creating trace instances with duplicate names
ring-buffer: Add checking nr_subbufs to persistent ring buffer validation
ring-buffer: Allow splice reads on static buffers
tracing: Take trace_array reference when opening options file
ftrace: Synchronize the initialization of ftrace_ops
ftrace: Take trace_array reference before accessing its ftrace_ops
tracing: Have show_event_filters/triggers files take trace array ref
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Pull bpf fixes from Alexei Starovoitov:
"This mainly contains verifier fixes that address bugs reported by
Nicholas Carlini.
- Fix incorrect non-NULL inference in pointer comparisons: pointer
types that may be NULL at runtime, pointers with unbounded offsets,
JMP32 comparisons with zero, and imprecise zero registers (Eduard
Zingerman)
- Fix precision tracking for half-dead zero spills, ld_abs/ld_ind
implicit subprog exit, bpf_loop() callbacks, linked scalar ids and
NULL call arguments (Eduard Zingerman)
- Reject BPF_PSEUDO_FUNC reference to the main program, fix zero
extension of arena 32-bit cmpxchg, don't rewrite bpf_fastcall
patterns entered by a jump (Eduard Zingerman)
- Fix percpu map update and BPF_F_CPU validation with sparse CPU IDs
(Hui Su)
- Fix NULL-ptr-derefs in bpf_snprintf_btf() for void and VAR types,
and reject key-less BTF for hash maps (Jiayuan Chen)
- Various fixes (Kumar Kartikeya Dwivedi):
- Fix out-of-bounds access in disassembler on invalid LDSX
instruction
- mark siginfo of signal tracepoints as scalar and
sched_process_wait argument as nullable
- mark faultable stack helpers as sleepable
- reject tail calls and legacy packet loads from callbacks
- enforce rbtree callback lock restrictions for resilient locks
- require MEM_PERCPU for percpu kptr stores
- clear NON_OWN_REF after RCU protection ends
- mark NULL kptr stores precise
- preserve inner map identity in callback frames
- reject non-scalar bpf_loop() iteration counts
- Fix trampoline allocation slowdown on x86 by using
EXECMEM_MODULE_DATA (Mike Rapoport)
- Keep bpf_refcount_acquire() nullable for borrowed RCU kptrs and
reject untrusted allocated-object pointers (Ning Ding)
- Fix special fields handling in recycled rhtab elements (Nuoqi Gui,
Yuan Chen)"
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (86 commits)
bpf, riscv: Make arena support depend on ZACAS
selftests/bpf: Test pointer bpf_loop iteration count rejection
bpf: Reject non-scalar bpf_loop iteration counts
bpf: use mark_arg_precision() in check_mem_size_reg()
bpf: propagate mark_chain_precision() errors out of loop_flag_is_zero()
selftests/bpf: precision of a NULL global subprogram BTF_ID argument
bpf: mark a NULL BTF_ID argument of a global subprogram precise
selftests/bpf: precision of a NULL kfunc argument
bpf: mark a NULL kfunc argument precise
selftests/bpf: precision of a NULL global subprogram memory argument
bpf: mark a NULL memory argument of a call precise
selftests/bpf: precision of a NULL helper argument
bpf: mark a NULL call argument precise
selftests/bpf: Test inner map identities in callbacks
bpf: Preserve inner map identity in callback frames
selftests/bpf: Test imprecise scalar kptr stores
bpf: Mark NULL kptr stores precise
selftests/bpf: Test rhtab kptr cancellation semantics
bpf: Cancel special fields when recycling rhtab elements
selftests/bpf: Test timer field on recycled rhtab element
...
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Pull locking fixes from Ingo Molnar:
- Fix a softirq processing delay bug in local_interrupt_disable(),
which should mostly only affect the Rust runtime (Boqun Feng)
- Remove the hardirq_disable_count() function which caused the
previous bug and is now unused & unnecessary (Boqun Feng)
- lockdep: Invalidate stale class_cache entries for zapped classes
(Eric Dumazet)
- Fix rt_mutex specific futex scheduling helpers
(Sebastian Andrzej Siewior)
- Fix rcuwait use-after-free race during futex requeue PI (Yao Kai)
* tag 'locking-urgent-2026-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Prevent rcuwait use-after-free during requeue PI
futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
locking/lockdep: Invalidate stale class_cache entries for zapped classes
preempt: Remove hardirq_disable_count()
interrupt: Disable interrupt before modifying hardirq_disable counter
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Pull IRQ subsystem fixes from Ingo Molnar:
- Revert a commit to the mbigen irqchip driver that caused
a regression on two-port Hi1616 chips (Caina)
- Fix a too-long-preemption-off bug in the stm32mp-exti
irqchip driver, caused by a time unit ambiguity & mismatch
(Ju Nan)
- Remove the now completely unused irq_domain_add_linear()
inline function (Jiri Slaby)
* tag 'irq-urgent-2026-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/stm32mp-exti: Fix the unit of the hwspinlock timeout
Revert "irqchip/mbigen: Fix mbigen node address layout"
irqdomain: Delete irq_domain_add_linear()
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bpf_loop() declares its nr_loops argument as ARG_ANYTHING. Privileged
programs may pass pointer values to such arguments, so check_func_arg()
lets a pointer-valued R1 reach the helper-specific checks.
Since commit bb124da69c47 ("bpf: keep track of max number of bpf_loop
callback iterations"), the verifier marks R1 precise and reads its upper
bound to limit callback simulation. Precision backtracking only accepts
scalar registers, so passing a pointer instead triggers the "backtracking
misuse" verifier warning. Kernels with panic_on_warn enabled subsequently
panic.
Introduce ARG_SCALAR for helper arguments that only accept scalar values
and use it for bpf_loop() nr_loops. Generic helper argument validation then
rejects pointers before loop inlining and precision processing.
Fixes: bb124da69c47 ("bpf: keep track of max number of bpf_loop callback iterations")
Reported-by: syzbot+7b47f87674e9a1569110@syzkaller.appspotmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://patch.msgid.link/20260905014735.1452988-2-memxor@gmail.com
Closes: https://lore.kernel.org/bpf/6a9ad24c.b5d4176b.238c3e.0001.GAE@google.com/
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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An RTM_NEWQDISC request can make clsact bind a populated shared ingress
block during ->init(), publishing an embedded mini_Qdisc to lockless
readers. If the same request has an invalid TCA_RATE, estimator setup
fails after ->init(); the unwind removes the pointer but synchronously
frees its containing qdisc while tc_run() may still hold it.
Retire failed qdiscs through the same RCU helper as normal destruction.
Inline the synchronous free into the callback now that no direct callers
remain.
Fixes: 51ab2994c387 ("net: sched: allow ingress and clsact qdiscs to share filter blocks")
Reported-by: Xiang Mei <xmei5@asu.edu>
Link: https://lore.kernel.org/netdev/20260805102505.740806-1-david.lee@trailofbits.com/
Signed-off-by: Weiming Shi <bestswngs@gmail.com>
Link: https://patch.msgid.link/20260902155231.2149915-2-bestswngs@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Pull block fixes from Jens Axboe:
- NVMe fixes via Keith:
- nvme-tcp fixes for an out-of-bounds write on an over-long PDU
- nvmet-tcp, nvmet-rdma and nvme-rdma leak and cleanup-ordering
fixes
- FDP placement id array racy access fix
- nvme-fc double free of fabrics options on nvme_add_ctrl()
failure, and a secret leak failure
- Fault injection opcode filtering
- stale namespace removal during scan
- Various other smaller fixes and cleanups
- Flag zoned disks with GENHD_FL_NO_PART
- Save the page offset gaps in a cloned bio
- Fix dma_alignment for large or unreported limits in loop and zloop
- Clear VM_MAYWRITE on a read-only ublk char device mmap
* tag 'block-7.3-20260905' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (25 commits)
nvme-tcp.h: drop kernel-doc comments, fix a few descriptions
nvme-fc: fix double free of fabrics options when nvme_add_ctrl() fails
nvmet: reject namespace enable without device path
nvmet-auth: Synchronize timeout work during SQ teardown
MAINTAINERS: update nvme entry
nvmet-tcp: reject unsolicited H2CData PDUs
nvme-tcp: defer TLS inline send to io_work
nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
nvme-tcp: return -EPROTO for a C2HData on a write
nvmet: print namespace IDs as unsigned 32bit value
nvme: print namespace IDs as unsigned 32bit value
nvme: remove stale namespaces by NSID range during scan
nvme: add missing SRCU grace period in error path
nvme-fabrics: fix DHCHAP secret leak on parse failure
ublk: clear VM_MAYWRITE on read-only ublk char device mmap
loop, zloop: fix dma_alignment for large or unreported limits
block: save page offset gaps in cloned bio
block: flag zoned disks with GENHD_FL_NO_PART
nvmet-rdma: fix queue leak when connect backlog is exceeded
nvme: add opcode filtering for fault injection
...
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Pull IMA fixes from Mimi Zohar:
- Instantiating the ima_file_truncate and ima_path_truncate LSM hooks
resulted in configfs locking issues.
configfs files should not be measured, appraised, or audited in the
first place, so the builtin policies are updated to exclude them.
- IMA audit messages include the filename, which could result in a page
fault when the filename doesn't exist
- Un-hide the IMA_MEASURE_PCR_IDX Kconfig prompt
* tag 'integrity-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: allow users to specify the pcr index with IMA_MEASURE_PCR_IDX
ima: Check for ERR_PTR from dentry_path() in validate_hash_algo()
ima: don't measure/appraise files on configfs
configfs: move CONFIGFS_MAGIC definition to magic.h
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Three drivers have shipped a get_rxnfc() which dumps its entire rule
table into rule_locs, reading rule_cnt as "how many rules do I have"
rather than "how many entries did the caller allocate". Nothing in the
callback's documentation contradicted that reading. The distinction only
matters because the ioctl lets an unprivileged caller pick rule_cnt
directly, so getting it wrong is a heap overflow rather than a truncated
dump.
Reviewed-by: Joe Damato <joe@dama.to>
Link: https://patch.msgid.link/20260903032611.3000029-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Stefan Schmidt says:
====================
pull-request: ieee802154 for net 2026-09-03
Zhiling Zou fixed a NULL deref when coming from a TUN device.
Fan Wu fixed a UAF in the cc2520 driver.
Chenguang Zhao fixed up some out of date comments in 6lowpan.
David Carlier fixed a potential double free in the hwsim driver.
Ibrahim Hashimov reworked the queuing in the RX path to fix a UAF on beacon
and MAC frames.
* tag 'ieee802154-for-net-2026-09-03' of git://git.kernel.org/pub/scm/linux/kernel/git/wpan/wpan:
mac802154: fix use-after-free of sdata via queued RX frames
ieee802154: hwsim: serialize pib updates to fix double-free
ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink
ieee802154: cc2520: fix FIFOP work use-after-free
net: 6lowpan: fix mismatched comments
====================
Link: https://patch.msgid.link/20260903093012.4032586-1-stefan@datenfreihafen.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Pull drm fixes from Dave Airlie:
"Lots of scattered fixes: nouveau has a bunch of display fixes for
blackwell GPUs that should mean we light up monitors properly and fix
some desktop rendering problems, amdgpu and intel display changes as
usual.
There also changes to the core pagemap, then the usual amouny of AI
inspired validation fixes.
core:
- Fix drm_crtc_commit leak when PAGE_FLIP_EVENT is used
dma-buf:
- Publish the dma-buf only after copy_to_user succeeds
- fix some kernel-doc warnings
atomic-state-helpers:
- set pixel_blend_mode to prop default on reset
sysfb:
- Fix integer overflow
- fix constant comparison bug
pagemap:
- Prevent double migration of device pages
- Reset migration page count on eviction retry
- dma-unmap pages before handling migration errors
- use after free fixes
prime:
- fix prime exports tracing
amdgpu:
- Fix for drm_amdgpu_info_device with mixed 64 bit kernel and 32 bit
userspace
- plane blend mode fixes
- SR-IOV fix
- GFX8 fix
- MES queue reset fix
- GPUVM fixes
- DCN 6 warning fix
- DCN 3.5/3.6 fix
- DML fix
- Backlight fix
- Colorop fix
- DC get_estimated_bw() fix
- devcoredump fix
- Userq fixes
- APU PSP fix
- Cursor fix
amdkfd:
- MES queue eviction fix
- MQD debugfs fix
xe:
- oa uapi error handling fix
- drm info message to report FLAT_CSS base misalignment
i915:
- Drop an accidentally duplicated panel fitter call in DP MST
- Fix DDI clock programming for Cx0 and LT PHY
- Fix PTL CDCLK handling at probe, causing a glitch
- Fix dg2_power_well_count() return type
- Fix a NULL pointer deref at forced probe
- Fix selective fetch disable
amdxdna:
- out-of-bounds access fix
- reject commands chains with no commands
- handle chained mapping BO failures
- refuse to flush an imported BO
ethosu:
- handle mmio mapping failures
- handle storage modes only on hardware that supports it
- fix job completion fence cleanup
fastrpc:
- Publish the dma-buf only after copy_to_user succeeds
gud:
- Improve TV modes and rotation handling
nouveau:
- use-after-free fixes
- add missing scanline position support
- HDMI and DP fixes
- null pointer dereference fix
- dmem accounting fixes for large folios
- use write-combined maps for coherent
qaic:
- out-of-bounds access fix
tegra:
- Add blend mode properties
virtio:
- exit path and error handling fixes
* tag 'drm-fixes-2026-09-05' of https://gitlab.freedesktop.org/drm/kernel: (83 commits)
drm/xe/vram: report FLAT_CCS base misalignment
MAINTAINERS, mailmap: use Aditya Garg's linux.dev account
drm/amd/display: use plane color_mgmt_changed to track colorop changes
drm/amdgpu/userq: fix struct drm_amdgpu_info_device padding for 32bit compile
drm/amd/display: Fix cursor disable with horizontally split planes
drm/amdgpu/userq: dont overwrite the error of subsequent map call
drm/amdgpu: Skip accessing psp rum time db for APUs
drm/amdgpu: update the fw version for gfx12 userqueues
drm/amdgpu: update the fw version for gfx11 userqueues
drm/amdgpu: fix byte/dword unit mismatch in coredump IB dump
drm/amdkfd: fix scope of mqd_mgr dereference in pqm_debugfs_mqds
drm/amd/display: fix division by zero in get_estimated_bw()
drm/amd/display: use halving distribution for all encode-to-linear curves
drm/amd/display: Fix backlight control for luminance-capable OLED
drm/amd/display: Remove const Qualifier From Non-Pointer Fields
drm/amd/display: Set gpuvm min page size to 4K on dcn35/36
drm/amd/display: Fix DCN5/6 DML2 compilation warnings
drm/amdgpu: fix Idle BOs list in VM debugfs status info
drm/amdgpu: use AMDGPU_GPU_PAGE_SHIFT instead of PAGE_SHIFT
drm/amdgpu: Update queue reset support version
...
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Concurrent subbuffer resizes may crash trace_pipe_raw readers or leak
uninitialized memory to userspace due to stale size values.
Modify ring_buffer_alloc_read_page() to handle the resizing of an
existing buffer_data_read_page if necessary and add a new
ring_buffer_read_page_size(). This new function enables ring-buffer
buffer_data_read_page users to not call the racy
ring_buffer_subbuf_size_get(). This makes the spare_size member of
ftrace_buffer_info redundant.
Finally, handle buffer_data_read_page/reader_page order discrepancy in
ring_buffer_read_page(). On a mismatch simply copy manually the data to
the buffer_data_read_page.
Link: https://lore.kernel.org/all/20260817140812.2C7D41F00A3A@smtp.kernel.org/
Link: https://patch.msgid.link/20260904164450.1345852-3-vdonnefort@google.com
Fixes: bce761d75745 ("ring-buffer: Read and write to ring buffers with custom sub buffer size")
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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When "nand-no-ecc-engine" is set in DT, nanddev_get_ecc_engine() takes
the NAND_ECC_ENGINE_TYPE_NONE path and returns success while leaving
nand->ecc.engine NULL. The SPI-NAND code nevertheless dereferences it
unconditionally to test for a pipelined engine, so probing such a
device oopses immediately.
Rather than open-coding the test three times, add a
nand_ecc_is_pipelined() helper to the NAND core that folds the NULL
check into the integration comparison, and use it everywhere. Future
callers then cannot reintroduce the problem.
Fixes: f9d7c7265bcf ("mtd: spinand: Create direct mapping descriptors for ECC operations")
Cc: stable@vger.kernel.org
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Pull probes fixes from Masami Hiramatsu:
- Protect kprobe_blacklist with RCU
RCU-protect kprobe_blacklist and use kfree_rcu() to prevent UAF races
during module unloading and enable safe atomic lookups.
- Fix multi-probe field use-after-free
Duplicate field and type strings on trace_probe_event to prevent UAF
when freeing primary probe
- Fix probe BTF member lookup:
Check the containing inner struct/union kflag when resolving
anonymous members to ensure correct bitfield offset calculation
Prevent unnamed bitfields from being pushed to anon_stack in
btf_find_struct_member(), avoiding false lookup errors
Fix code block indentation in get_bitoffset_of_field()
- uprobes error pointer safety
Guard free_trace_uprobe() with IS_ERR_OR_NULL() to avoid crashing
during automatic cleanup when an error pointer is returned
* tag 'probes-fixes-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
kprobes: Protect kprobe_blacklist with RCU
tracing/probes: Fix use-after-free on field name/type of events with multiple probes
tracing/probes: Fix code indent in get_bitoffset_of_field()
tracing/probes: Fix BTF kflag check for anonymous struct member access
tracing/probes: Fix anon_stack check for unnamed bitfields in btf_find_struct_member
uprobes: guard trace cleanup against error pointers
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When the final RCU read-side critical section ends, a local kptr is demoted
to PTR_UNTRUSTED but retains MEM_ALLOC. The pointer may be NULL or may refer
to an object whose lifetime is no longer protected.
type_is_ptr_alloc_obj() nevertheless recognizes any PTR_TO_BTF_ID with
MEM_ALLOC as a live allocated object. In particular, a refcount-only local
kptr never carries NON_OWN_REF, so it still passes the
bpf_refcount_acquire() argument check after RCU protection ends. The kfunc
can then dereference NULL or stale memory.
Make type_is_ptr_alloc_obj() reject PTR_UNTRUSTED pointers. Since
type_is_non_owning_ref() is based on the same predicate, graph kfunc
arguments obey the same live-object requirement. Fault-protected reads of
the demoted pointer remain valid: writes are already rejected, and read
fixups use bpf_may_fault_on_deref() rather than this predicate.
Fixes: 1b12171533a9 ("bpf: Mark direct ld of stashed bpf_{rb,list}_node as non-owning ref")
Reported-by: Nicholas Carlini <npc@anthropic.com>
Suggested-by: Nicholas Carlini <npc@anthropic.com>
Signed-off-by: Ning Ding <dingning04@gmail.com>
[ kkd: Rewrote commit log ]
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-8-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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amd-drm-fixes-7.3-2026-09-03:
amdgpu:
- SR-IOV fix
- GFX8 fix
- MES queue reset fix
- GPUVM fixes
- DCN 6 warning fix
- DCN 3.5/3.6 fix
- DML fix
- Backlight fix
- Colorop fix
- DC get_estimated_bw() fix
- devcoredump fix
- Userq fixes
- APU PSP fix
- Cursor fix
amdkfd:
- MES queue eviction fix
- MQD debugfs fix
UAPI:
- Fix for drm_amdgpu_info_device with mixed 64 bit kernel and 32 bit userspace
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patch.msgid.link/20260903174712.584320-1-alexander.deucher@amd.com
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ieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom
fields before checking whether the element contains even the fixed
header. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to
account for the optional Address Extension field. Consequently, an
empty PREQ element causes a one-byte read beyond its declared payload.
Move the helper call after both size checks, so the bottom fields are
only accessed when they are present.
Fixes: 8b40b1d24a60 ("wifi: mac80211: Fix overread in PREQ frame processing")
Cc: stable@vger.kernel.org
Signed-off-by: Ivan Pustogarov <ivan@ipust.net>
Link: https://patch.msgid.link/20260903152616.1646637-1-ivan@ipust.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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7.3-rc1 is free of calls to irq_domain_add_linear(), so it can be finally
deleted.
According to Dongliang Mu, the related paragraph in the Chinese docs is now
obsolete. So drop it completely.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Yanteng Si <si.yanteng@linux.dev>
Link: https://patch.msgid.link/20260901070450.255507-1-jirislaby@kernel.org
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When connected to another host and then unplugging cable lockdep
triggers following:
======================================================
WARNING: possible circular locking dependency detected
7.1.0-rc2+ #1775 Tainted: G U
------------------------------------------------------
kworker/u16:6/312 is trying to acquire lock:
ffff8881179c70a8 ((work_completion)(&ring->work)){+.+.}-{0:0}, at: __flush_work+0x3cf/0xd10
but task is already holding lock:
ffff8881a8b810b0 (&net->connection_lock){+.+.}-{4:4}, at: tbnet_tear_down+0x110/0x720 [thunderbolt_net]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&net->connection_lock){+.+.}-{4:4}:
__mutex_lock+0x19a/0x2490
mutex_lock_nested+0x1b/0x30
tbnet_handle_packet+0x74c/0xd70 [thunderbolt_net]
tb_xdomain_handle_request+0x37c/0x4b0 [thunderbolt]
tb_domain_event_cb+0xc9/0x140 [thunderbolt]
tb_ctl_handle_event+0xd6/0x2c0 [thunderbolt]
tb_ctl_rx_callback+0x22c/0xa10 [thunderbolt]
ring_work+0x715/0xcb0 [thunderbolt]
process_one_work+0x902/0x1790
worker_thread+0x5cd/0xfe0
kthread+0x339/0x420
ret_from_fork+0x79a/0x9d0
ret_from_fork_asm+0x1a/0x30
-> #0 ((work_completion)(&ring->work)){+.+.}-{0:0}:
__lock_acquire+0x1592/0x2640
lock_acquire+0x1a3/0x300
__flush_work+0x3e9/0xd10
flush_work+0x21/0x30
tb_ring_stop+0x240/0x840 [thunderbolt]
tbnet_tear_down+0x2ff/0x720 [thunderbolt_net]
tbnet_stop+0x47/0x1a0 [thunderbolt_net]
__dev_close_many+0x19e/0x4e0
netif_close_many+0x1e8/0x640
unregister_netdevice_many_notify+0x6d3/0x22d0
unregister_netdevice_queue+0x2b9/0x3a0
unregister_netdev+0x1c/0x70
tbnet_remove+0x52/0xb0 [thunderbolt_net]
tb_service_remove+0x8a/0xe0 [thunderbolt]
device_remove+0xc5/0x190
device_release_driver_internal+0x3db/0x590
device_release_driver+0x12/0x20
bus_remove_device+0x2c1/0x580
device_del+0x3d9/0x9f0
device_unregister+0x17/0xc0
unregister_service+0x46/0x60 [thunderbolt]
device_for_each_child_reverse+0xfa/0x180
tb_xdomain_unregister+0x57/0xe0 [thunderbolt]
unregister_unplugged_xdomain+0x101/0x1a0 [thunderbolt]
bus_for_each_dev+0x111/0x1a0
tb_domain_unregister_unplugged_xdomains+0x98/0xe0 [thunderbolt]
tb_handle_hotplug+0xc3/0x2bb0 [thunderbolt]
process_one_work+0x902/0x1790
worker_thread+0x5cd/0xfe0
kthread+0x339/0x420
ret_from_fork+0x79a/0x9d0
ret_from_fork_asm+0x1a/0x30
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&net->connection_lock);
lock((work_completion)(&ring->work));
lock(&net->connection_lock);
lock((work_completion)(&ring->work));
This in fact is false positive because they involve unrelated rings (and
unrelated work structures). In the first one it is ring 0 which is used
for control traffic and in the second it is dealing with another ring
used for the high-speed traffic.
Fix this by using separate lock class for each ring worker.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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There is rt_mutex_{pre|post}_schedule() around
rt_mutex_wait_proxy_lock() to ensure that sched_submit_work()/
sched_update_worker() is invoked before we schedule out and block on
rt_mutex while waiting for it become available.
The reason is that blocking on rt_mutex assigns a pi_waiter for the PI
chain and sched_submit_work() will also assign a pi_waiter if it blocks
on lock but a this point we already have a waiter assigned.
We can't skip sched_submit_work() entirely because I/O relies on the
fact that I/O queue is flushed while it blocks on a sleeping lock.
Therefore sched_submit_work() is moved before we block on the lock.
Sleeping lock in this context means mutex or rw_semaphore not spinlock_t
on PREEMPT_RT. Because the mutex abstraction on PREEMPT_RT uses the same
abstraction as the futex proxy lock, the futex code ended up using
rt_mutex_{pre|post}_schedule(), too.
Using it is/ was just to keep the task_struct::sched_rt_mutex assertion
happy. Futex proxy lock is used only in the syscall context of a task.
At this point it never got any I/O that needs to be flushed and it can't
be a workqueue that needs to notify that it will be scheduled out.
Therefore sched_submit_work() does nothing here.
By mistake futex_wait_requeue_pi() -> rt_mutex_wait_proxy_lock() did not
get the rt_mutex_{pre|post}_schedule() annotation. This was not noticed
because in this callchain the lock is (usually) not contended and so
rt_mutex_slowlock_block() does not schedule, triggering the assert.
Adding rt_mutex_pre_schedule() here looks wrong (as noted by PeterZ)
because at this point there is a pi_waiter recorded and invoking
sched_submit_work() with a possible lock contention would be wrong.
Add rt_mutex_futex_{pre|post}_schedule() which toggles the
sched_rt_mutex assert and does not involve sched_submit_work(). Add
asserts here to ensure that sched_submit_work() would do nothing. Use it
only in futex proxy lock case which is rt_mutex_wait_proxy_lock().
Remove it from futex_lock_pi().
Fixes: d14f9e930b90 ("locking/rtmutex: Use rt_mutex specific scheduler helpers")
Reported-by: Yao Kai <yaokai34@huawei.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260901135453.3121948-2-bigeasy@linutronix.de
Closes: https://lore.kernel.org/all/20260717084922.4153317-2-yaokai34@huawei.com
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mark_fastcall_pattern_for_call() must ensure that matched
"spill; call; fill" instruction series is not interrupted by a jump.
Otherwise the rewrite applied by bpf_remove_fastcall_spills_fills()
is not sound.
Record the instructions targeted by jumps in
insn_aux_data[*].jump_target when the CFG is built and use this flag
to stop growing a pattern at such an instruction. Jumps to the first
spill are fine.
Note that existing insn_aux_data[*].jmp_point field can't be reused,
as it marks subprogram return instructions.
Fixes: 5b5f51bff1b6 ("bpf: no_caller_saved_registers attribute for helper calls")
Reported-by: Nicholas Carlini <npc@anthropic.com>
Suggested-by: Nicholas Carlini <npc@anthropic.com>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260903205820.1743087-1-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Pull NVMe fixes from Keith:
"- Harden the tcp host and target against malformed PDUs: reject C2HData
for a non-read command, bound an over-long PDU before copying it, and
reject unsolicited H2CData (Yehyeong, Shivam)
- Fix circular locking on TLS queues (Xixin)
- Fix a soft lockup when scanning sparse namespace ID space (Mohamed)
- Fix racy access to the FDP placement id array (Kanchan)
- RDMA host and target fixes for a double cleanup on the queue_rq
error path and a queue leak when the connect backlog is exceeded
(Xixin)
- Authentication fixes: drain the target's expiry work before the SQ
is freed, and release the DH-CHAP secret when parsing fails (Kazuki,
Xu Rao)
- Fix nvme-fc options double free when nvme_add_ctrl() fails (Niklas)
- Add missing SRCU grace period to nvme_alloc_ns() error path (Tristan)
- Skip zoned limits update when the zone info query failed (Chao)
- Reject enabling a target namespace with no device path (Seokgyu)
- Add opcode filtering for fault injection (Mohamed)
- Drop the kernel-doc comments from nvme-tcp.h (Randy)"
* tag 'nvme-7.3-2026-09-03' of git://git.infradead.org/nvme: (21 commits)
nvme-tcp.h: drop kernel-doc comments, fix a few descriptions
nvme-fc: fix double free of fabrics options when nvme_add_ctrl() fails
nvmet: reject namespace enable without device path
nvmet-auth: Synchronize timeout work during SQ teardown
MAINTAINERS: update nvme entry
nvmet-tcp: reject unsolicited H2CData PDUs
nvme-tcp: defer TLS inline send to io_work
nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
nvme-tcp: return -EPROTO for a C2HData on a write
nvmet: print namespace IDs as unsigned 32bit value
nvme: print namespace IDs as unsigned 32bit value
nvme: remove stale namespaces by NSID range during scan
nvme: add missing SRCU grace period in error path
nvme-fabrics: fix DHCHAP secret leak on parse failure
nvmet-rdma: fix queue leak when connect backlog is exceeded
nvme: add opcode filtering for fault injection
nvme: fix racy access to FDP placement id array
nvme: set ns->head in nvme_alloc_ns_head
nvme-rdma: fix -EIO cleanup order in queue_rq
nvme: skip the zoned limits update if the zone info query failed
...
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Pull misc fixes from Andrew Morton:
"18 hotfixes. 13 are cc:stable. 15 are for MM.
All are singletons - please see the changelogs for details.
There are no fixes (yet) for all the stuff we added in the most recent
merge window. Hopefully a good sign"
* tag 'mm-hotfixes-stable-2026-09-03-17-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm/secretmem: properly account locked pages
mm/mremap: reset unfaulted VMA page offset for MREMAP_DONTUNMAP
MAINTAINERS: add Kiryl as a THP reviewer
MAINTAINERS: cover all of RAID
MAINTAINERS: mailmap: update entries for Thorsten Blum
MAINTAINERS: remove Lorenzo as THP co-maintainer
Revert "once: don't use a work queue to reset sleepable static key"
mm/hugetlb: fix missing migratable flag on same-node hugetlb migration
mm/mempolicy: fix sleeping allocation in alloc_pages_bulk_weighted_interleave()
mm/huge_memory: transfer the pmd dirty bit to the folio on zap
MAINTAINERS: add Lance Yang as a hung task detector co-maintainer
userfaultfd: reset err to be 0 when move_pages_ptes succeeded
mm: fix incorrect vm_flags usage when checking allowable orders for tmpfs
mm/hugetlb: keep max_huge_pages when dissolving surplus folios
mm/migrate_device: avoid out-of-bounds writes for compound folios
mm/hugetlb_cgroup: call page_counter_set_max() outside VM_BUG_ON()
memcg: make the v1 soft limit knob inert
mm/hugetlb_cma: fix null nodemask dereference in hugetlb_cma_alloc_frozen_folio
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Expand @fei into @feil and @feih because the field was split due to it
not being 32-bit aligned.
Struct member @hdr was described twice in struct nvme_tcp_rsp_pdu, so
drop one of them.
These structs are defined in a spec outside of the kernel, so kernel-doc
comments for them aren't needed here as well.
This avoids kernel-doc warnings:
Warning: include/linux/nvme-tcp.h:95 struct member 'rsvd2' not described in 'nvme_tcp_icreq_pdu'
Warning: include/linux/nvme-tcp.h:113 struct member 'rsvd' not described in 'nvme_tcp_icresp_pdu'
Warning: include/linux/nvme-tcp.h:128 struct member 'feil' not described in 'nvme_tcp_term_pdu'
Warning: include/linux/nvme-tcp.h:128 struct member 'feiu' not described in 'nvme_tcp_term_pdu'
Warning: include/linux/nvme-tcp.h:128 struct member 'rsvd' not described in 'nvme_tcp_term_pdu'
Warning: include/linux/nvme-tcp.h:169 struct member 'rsvd' not described in 'nvme_tcp_r2t_pdu'
Warning: include/linux/nvme-tcp.h:187 struct member 'rsvd' not described in 'nvme_tcp_data_pdu'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
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Pull ACPI fix from Rafael Wysocki:
"Drop two structure fields that have no more users after recent
changes"
* tag 'acpi-7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: bus: Drop two fields from struct acpi_device_pnp
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secretmem accounts folios by treating memory as if it were mlock()'d and
thus limited by the RLIMIT_MEMLOCK limit.
However the folios are unevictable and remain so until the inode is
evicted, eliminating usual mlock() semantics - mapping folios then
unmapping them does not clear their unevictable state, since it depends on
AS_UNEVICTABLE, not PG_mlocked.
A user can therefore easily work around the RLIMIT_MEMLOCK limit - simply
map then unmap and VmLck no longer counts the secretmem range. Worse,
folios are not accounted in the process's RSS, meaning the OOM killer
won't know to kill the process.
Repeatedly mapping/unmapping (or forking) can then result in the
consumption of all available system memory with unevictable folios and
cause system instability.
A secretmem fd can be passed between processes and over fork so a
per-process limit simply does not make sense, so follow the precedent set
by io_uring, perf, skbuff, iommufd and xdp by tracking the number of
locked pages in user_struct->locked_vm.
Since the scope tracked is actually inode lifetime, the RLIMIT_MEMLOCK
applies per-user not per-process, so it doesn't make sense to bypass for
users with CAP_IPC_LOCK, therefore remove this bypass.
There is simply no reason to carry on marking the mapping as mlock()'d
since it's misleading and the lifecycle is now correctly handled, so
remove this too.
Note that secretmem does not support any form of truncation (including
hole punching) and the folios are unreclaimable, so the folios need only
be accounted on fault and unaccounted on inode destruction.
__secretmem_account_pages() is more or less a duplicate of the code that
io_uring etc. use, but since this is a bug fix that needs backporting,
defer any de-duplication efforts to a follow-up.
test_mlock_limit() asserts mlock_future_ok() on mmap(), however this has
been removed, so remove the test altogether for the fix. A new test will
be sent separately for upstream.
Link: https://lore.kernel.org/20260826-secretmem-accounting-v3-1-94cb04399510@kernel.org
Fixes: 1507f51255c9 ("mm: introduce memfd_secret system call to create "secret" memory areas")
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reported-by: Daehyeon Ko <4ncienth@gmail.com>
Closes: https://lore.kernel.org/linux-mm/20260813225328.2010303-1-4ncienth@gmail.com/
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Tested-by: Daehyeon Ko <4ncienth@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: Jakub Kacinski <kuba@kernel.org>
Cc: James Bottomley <james.bottomley@HansenPartnership.com>
Cc: Jesper Dangaard Brouer <hawk@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Stanislav Fomichev <sdf@fomichev.me>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Pull s390 fixes from Heiko Carstens:
- Use jiffies instead of jiffies_64 to address a data-race reported by
KCSAN
- Unpoison cpacf instruction results to address KMSAN reports
- Drop unused member from ap_device_id
- Fix potential NULL pointer dereferences in IPL code
- Add missing length check to SCLP error report handling
- Add missing length check to zcrypt CCA code
- Fix return code handling in diag324 code
- Handle multiple PMU stop callback invocations in perf pai code
correctly
- Reduce excessive debug feature size in perf pai code from 32 MiB to
4KiB
- Switch to common CPU capacity code in topology code to get rid of few
lines of code
- Address various bugs in corner cases in boot code
- Simplify/Rework crst_table_upgrade() to address a potential NULL
pointer dereference in case of an allocation failure
- Initialize padding bytes in CRT key structure in zcrypt code
* tag 's390-7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/zcrypt: Fix uninitialized padding in CRT key structure
s390/mm: Simplify crst_table_upgrade()
s390/boot: Bound command line facility ranges
s390/boot: Avoid IPL parameter append past command line
s390/boot: Fix physical memory search range
s390/topology: Switch to common cpu capacity code
s390/pai: Reduce excessive debug feature size
s390/pai: Handle multiple PMU stop callback invocations
s390/diag324: Preserve -EBUSY return code
s390/zcrypt: Validate length in reply before using it
s390/pci: Fix leak of uninitialized kernel data in SCLP report
s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
s390/ipl: Fix NULL deref in kdump without re-IPL parm block
s390/ap: Drop unused member from ap_device_id
s390/cpacf: Unpoison instruction results
s390/time: Use jiffies instead of jiffies_64
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Pull networking fixes from Paolo Abeni:
"Including fixes from bluetooth.
Previous releases - regressions:
- page_pool: keep frag_offset aligned for odd-sized requests
- sched: fix u32 duplicate handle when node ID pool is exhausted
- udp: create exceptions before socket matching
- igmp: convert struct ip_sf_list to RCU
- ip6_gre: check tunnel info before xmit in ip6gre_tunnel_xmit
- rds: acquire the fastpath locks in rds_conn_shutdown()
- tipc:
- protect node reset trace dump with node lock
- fix NULL deref in tipc_named_node_up() on empty publication
list
- bluetooth:
- L2CAP: fix out-of-bounds write in l2cap_ecred_connect
- hci_core: fix race condition during device registration
- eth:
- mlx5e: prevent stale XSK buffer release on refill retries
- bridge: don't truncate the port group walk on teardown
Previous releases - always broken:
- gro: fix nesting of TCP GSO SKBs in skb_gro_receive_list()
- sched: fix skb sizing and action leak on reoffload delete
- tcp: fix use-after-free in do_tcp_getsockopt()
- af_packet: don't cast tpacket_hdr.tp_len to int in
tpacket_parse_header()
- sctp: fix soft lockup from unpadded ASCONF-ACK parameter iteration
- iptunnel: fix stale transport header during tunnel decapsulation
- eth:
- vxlan: fix use-after-free in vxlan_mdb_remote_src_del()
- bonding: fix uninitialized transport header access in
alb_determine_nd()"
* tag 'net-7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (83 commits)
net: gro: Fix nesting of TCP GSO SKBs in skb_gro_receive_list()
net: stmmac: reconfigure RX packet parser table in stmmac_hw_setup() after reset
net: airoha: enable RX_DONE interrupt for RX queue 31
net/rds: don't let rds_conn_shutdown() consume a concurrent drop
net/rds: acquire the fastpath locks in rds_conn_shutdown()
net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
net/rds: tcp: don't force RDS_CONN_RESETTING over a concurrent shutdown
net/rds: clear cp_flags bits individually in rds_conn_path_reset()
net/rds: use clear_bit_unlock() in release_refill()
net/rds: use wq_has_sleeper() in release_in_xmit()
net: usb: qmi_wwan: add Compal EXM-G1x support
net: macb: exclude software FCS from TX byte statistics
net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().
net: bridge: mcast: don't truncate the port group walk on teardown
bonding: do not clear curr_active_slave prematurely when releasing all slaves
net: qrtr: Send HELLO message on endpoint register
octeontx2-af: Fix limiting SRIOV VF count logic
bonding: alb: fix uninitialized transport header access in alb_determine_nd()
s390/ctcm: Prevent XID null dereference
net: psp: do not inherit the Rx association on clone
...
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Sean Christopherson
Hemanth Selam
Linus Torvalds
Greg Kroah-Hartman
Daniel Borkmann
Vincent Guittot
Karl Mehltretter
Johannes Berg
Donggeun Yoo
Lorenzo Stoakes (ARM)
Jakub Kicinski
Mickaël Salaün
Johan Hovold
Alice Mikityanska
Florian Westphal
Thomas Gleixner
Michael Bommarito
Kumar Kartikeya Dwivedi
Weiming Shi
Vincent Donnefort
Nuno Sá
Ning Ding
Dave Airlie
Ivan Pustogarov
Jiri Slaby (SUSE)
Mika Westerberg
Sebastian Andrzej Siewior
Eduard Zingerman
Jens Axboe
Randy Dunlap