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When producing the bpf-helpers.7 man page from the documentation from
the BPF user space header file, rst2man complains:
<stdin>:2636: (ERROR/3) Unexpected indentation.
<stdin>:2640: (WARNING/2) Block quote ends without a blank line; unexpected unindent.
Let's fix formatting for the relevant chunk (item list in
bpf_ringbuf_query()'s description), and for a couple other functions.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200623153935.6215-1-quentin@isovalent.com
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This is a fix for a regression in commit 2c78ee898d8f ("bpf: Implement CAP_BPF").
Before the above commit it was possible to load network bpf programs
with just the CAP_SYS_ADMIN privilege.
The Android bpfloader happens to run in such a configuration (it has
SYS_ADMIN but not NET_ADMIN) and creates maps and loads bpf programs
for later use by Android's netd (which has NET_ADMIN but not SYS_ADMIN).
Fixes: 2c78ee898d8f ("bpf: Implement CAP_BPF")
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Link: https://lore.kernel.org/bpf/20200620212616.93894-1-zenczykowski@gmail.com
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Currently, if a bpf program has more than one subprograms, each program will be
jitted separately. For programs with bpf-to-bpf calls the
prog->aux->num_exentries is not setup properly. For example, with
bpf_iter_netlink.c modified to force one function to be not inlined and with
CONFIG_BPF_JIT_ALWAYS_ON the following error is seen:
$ ./test_progs -n 3/3
...
libbpf: failed to load program 'iter/netlink'
libbpf: failed to load object 'bpf_iter_netlink'
libbpf: failed to load BPF skeleton 'bpf_iter_netlink': -4007
test_netlink:FAIL:bpf_iter_netlink__open_and_load skeleton open_and_load failed
#3/3 netlink:FAIL
The dmesg shows the following errors:
ex gen bug
which is triggered by the following code in arch/x86/net/bpf_jit_comp.c:
if (excnt >= bpf_prog->aux->num_exentries) {
pr_err("ex gen bug\n");
return -EFAULT;
}
This patch fixes the issue by computing proper num_exentries for each
subprogram before calling JIT.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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bpf_object__find_program_by_title(), used by CO-RE relocation code, doesn't
return .text "BPF program", if it is a function storage for sub-programs.
Because of that, any CO-RE relocation in helper non-inlined functions will
fail. Fix this by searching for .text-corresponding BPF program manually.
Adjust one of bpf_iter selftest to exhibit this pattern.
Fixes: ddc7c3042614 ("libbpf: implement BPF CO-RE offset relocation algorithm")
Reported-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200619230423.691274-1-andriin@fb.com
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Systems that doesn't yet have the very latest linux/bpf.h header, enum
bpf_stats_type will be undefined, causing compilation warnings. Prevents this
by forward-declaring enum.
Fixes: 0bee106716cf ("libbpf: Add support for command BPF_ENABLE_STATS")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200621031159.2279101-1-andriin@fb.com
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The old address has been bouncing for a while now
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The user tool modinfo is used to get information on kernel modules, including a
description where it is available.
This patch adds a brief MODULE_DESCRIPTION to the following modules:
9p
drop_monitor
esp4_offload
esp6_offload
fou
fou6
ila
sch_fq
sch_fq_codel
sch_hhf
Signed-off-by: Rob Gill <rrobgill@protonmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When preallocated service calls are being discarded, they're passed to
->discard_new_call() to have the caller clean up any attached higher-layer
preallocated pieces before being marked completed. However, the act of
marking them completed now invokes the call's notification function - which
causes a problem because that function might assume that the previously
freed pieces of memory are still there.
Fix this by setting a dummy notification function on the socket after
calling ->discard_new_call().
This results in the following kasan message when the kafs module is
removed.
==================================================================
BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 fs/afs/rxrpc.c:707
Write of size 1 at addr ffff8880946c39e4 by task kworker/u4:1/21
CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18f/0x20d lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xd3/0x413 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
afs_wake_up_async_call+0x6aa/0x770 fs/afs/rxrpc.c:707
rxrpc_notify_socket+0x1db/0x5d0 net/rxrpc/recvmsg.c:40
__rxrpc_set_call_completion.part.0+0x172/0x410 net/rxrpc/recvmsg.c:76
__rxrpc_call_completed net/rxrpc/recvmsg.c:112 [inline]
rxrpc_call_completed+0xca/0xf0 net/rxrpc/recvmsg.c:111
rxrpc_discard_prealloc+0x781/0xab0 net/rxrpc/call_accept.c:233
rxrpc_listen+0x147/0x360 net/rxrpc/af_rxrpc.c:245
afs_close_socket+0x95/0x320 fs/afs/rxrpc.c:110
afs_net_exit+0x1bc/0x310 fs/afs/main.c:155
ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186
cleanup_net+0x511/0xa50 net/core/net_namespace.c:603
process_one_work+0x965/0x1690 kernel/workqueue.c:2269
worker_thread+0x96/0xe10 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Allocated by task 6820:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc mm/kasan/common.c:494 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:467
kmem_cache_alloc_trace+0x153/0x7d0 mm/slab.c:3551
kmalloc include/linux/slab.h:555 [inline]
kzalloc include/linux/slab.h:669 [inline]
afs_alloc_call+0x55/0x630 fs/afs/rxrpc.c:141
afs_charge_preallocation+0xe9/0x2d0 fs/afs/rxrpc.c:757
afs_open_socket+0x292/0x360 fs/afs/rxrpc.c:92
afs_net_init+0xa6c/0xe30 fs/afs/main.c:125
ops_init+0xaf/0x420 net/core/net_namespace.c:151
setup_net+0x2de/0x860 net/core/net_namespace.c:341
copy_net_ns+0x293/0x590 net/core/net_namespace.c:482
create_new_namespaces+0x3fb/0xb30 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:231
ksys_unshare+0x43d/0x8e0 kernel/fork.c:2983
__do_sys_unshare kernel/fork.c:3051 [inline]
__se_sys_unshare kernel/fork.c:3049 [inline]
__x64_sys_unshare+0x2d/0x40 kernel/fork.c:3049
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 21:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
kasan_set_free_info mm/kasan/common.c:316 [inline]
__kasan_slab_free+0xf7/0x140 mm/kasan/common.c:455
__cache_free mm/slab.c:3426 [inline]
kfree+0x109/0x2b0 mm/slab.c:3757
afs_put_call+0x585/0xa40 fs/afs/rxrpc.c:190
rxrpc_discard_prealloc+0x764/0xab0 net/rxrpc/call_accept.c:230
rxrpc_listen+0x147/0x360 net/rxrpc/af_rxrpc.c:245
afs_close_socket+0x95/0x320 fs/afs/rxrpc.c:110
afs_net_exit+0x1bc/0x310 fs/afs/main.c:155
ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186
cleanup_net+0x511/0xa50 net/core/net_namespace.c:603
process_one_work+0x965/0x1690 kernel/workqueue.c:2269
worker_thread+0x96/0xe10 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
The buggy address belongs to the object at ffff8880946c3800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 484 bytes inside of
1024-byte region [ffff8880946c3800, ffff8880946c3c00)
The buggy address belongs to the page:
page:ffffea000251b0c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002546508 ffffea00024fa248 ffff8880aa000c40
raw: 0000000000000000 ffff8880946c3000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880946c3880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880946c3900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880946c3980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880946c3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880946c3a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Reported-by: syzbot+d3eccef36ddbd02713e9@syzkaller.appspotmail.com
Fixes: 5ac0d62226a0 ("rxrpc: Fix missing notification")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since iproute2 commit f72c3ad00f3b ("tc: m_tunnel_key: add options
support for vxlan"), the geneve opt output use key word "geneve_opts"
instead of "geneve_opt". To make compatibility for both old and new
iproute2, let's accept both "geneve_opt" and "geneve_opts".
Suggested-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Typically the firmware takes care that tp->ocp_base is reset to its
default value. That's not the case (at least) for RTL8117.
As a result subsequent PHY access reads/writes the wrong page and
the link is broken. Fix this be resetting tp->ocp_base explicitly.
Fixes: 229c1e0dfd3d ("r8169: load firmware for RTL8168fp/RTL8117")
Reported-by: Aaron Ma <mapengyu@gmail.com>
Tested-by: Aaron Ma <mapengyu@gmail.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Continue the reset path when partner adapter is not ready or H_CLOSED is
returned from reset crq. This patch allows the CRQ init to proceed to
establish a valid CRQ for traffic to flow after reset.
Signed-off-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Even with moving netif_tx_disable() to an earlier point when
taking down the queues for a reconfiguration, we still end
up with the occasional netdev watchdog Tx Timeout complaint.
The old method of using netif_trans_update() works fine for
queue 0, but has no effect on the remaining queues. Using
netif_device_detach() allows us to signal to the watchdog to
ignore us for the moment.
Fixes: beead698b173 ("ionic: Add the basic NDO callbacks for netdev support")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Acked-by: Jonathan Toppins <jtoppins@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ETF qdisc can queue skbs that it could not pace on the errqueue.
Address a few issues in the selftest
- recv buffer size was too small, and incorrectly calculated
- compared errno to ee_code instead of ee_errno
- missed invalid request error type
v2:
- fix a few checkpatch --strict indentation warnings
Fixes: ea6a547669b3 ("selftests/net: make so_txtime more robust to timer variance")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The max MTU limit defined for ibmveth is not accounting for
virtual ethernet buffer overhead, which is twenty-two additional
bytes set aside for the ethernet header and eight additional bytes
of an opaque handle reserved for use by the hypervisor. Update the
max MTU to reflect this overhead.
Fixes: d894be57ca92 ("ethernet: use net core MTU range checking in more drivers")
Fixes: 110447f8269a ("ethernet: fix min/max MTU typos")
Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The block->nooffloaddevcnt should always count for indr block.
even the indr block offload successful. The representor maybe
gone away and the ingress qdisc can work in software mode.
block->nooffloaddevcnt warning with following dmesg log:
[ 760.667058] #####################################################
[ 760.668186] ## TEST test-ecmp-add-vxlan-encap-disable-sriov.sh ##
[ 760.669179] #####################################################
[ 761.780655] :test: Fedora 30 (Thirty)
[ 761.783794] :test: Linux reg-r-vrt-018-180 5.7.0+
[ 761.822890] :test: NIC ens1f0 FW 16.26.6000 PCI 0000:81:00.0 DEVICE 0x1019 ConnectX-5 Ex
[ 761.860244] mlx5_core 0000:81:00.0 ens1f0: Link up
[ 761.880693] IPv6: ADDRCONF(NETDEV_CHANGE): ens1f0: link becomes ready
[ 762.059732] mlx5_core 0000:81:00.1 ens1f1: Link up
[ 762.234341] :test: unbind vfs of ens1f0
[ 762.257825] :test: Change ens1f0 eswitch (0000:81:00.0) mode to switchdev
[ 762.291363] :test: unbind vfs of ens1f1
[ 762.306914] :test: Change ens1f1 eswitch (0000:81:00.1) mode to switchdev
[ 762.309237] mlx5_core 0000:81:00.1: E-Switch: Disable: mode(LEGACY), nvfs(2), active vports(3)
[ 763.282598] mlx5_core 0000:81:00.1: E-Switch: Supported tc offload range - chains: 4294967294, prios: 4294967295
[ 763.362825] mlx5_core 0000:81:00.1: MLX5E: StrdRq(1) RqSz(8) StrdSz(2048) RxCqeCmprss(0)
[ 763.444465] mlx5_core 0000:81:00.1 ens1f1: renamed from eth0
[ 763.460088] mlx5_core 0000:81:00.1: MLX5E: StrdRq(1) RqSz(8) StrdSz(2048) RxCqeCmprss(0)
[ 763.502586] mlx5_core 0000:81:00.1: MLX5E: StrdRq(1) RqSz(8) StrdSz(2048) RxCqeCmprss(0)
[ 763.552429] ens1f1_0: renamed from eth0
[ 763.569569] mlx5_core 0000:81:00.1: E-Switch: Enable: mode(OFFLOADS), nvfs(2), active vports(3)
[ 763.629694] ens1f1_1: renamed from eth1
[ 764.631552] IPv6: ADDRCONF(NETDEV_CHANGE): ens1f1_0: link becomes ready
[ 764.670841] :test: unbind vfs of ens1f0
[ 764.681966] :test: unbind vfs of ens1f1
[ 764.726762] mlx5_core 0000:81:00.0 ens1f0: Link up
[ 764.766511] mlx5_core 0000:81:00.1 ens1f1: Link up
[ 764.797325] :test: Add multipath vxlan encap rule and disable sriov
[ 764.798544] :test: config multipath route
[ 764.812732] mlx5_core 0000:81:00.0: lag map port 1:2 port 2:2
[ 764.874556] mlx5_core 0000:81:00.0: modify lag map port 1:1 port 2:2
[ 765.603681] :test: OK
[ 765.659048] IPv6: ADDRCONF(NETDEV_CHANGE): ens1f1_1: link becomes ready
[ 765.675085] :test: verify rule in hw
[ 765.694237] IPv6: ADDRCONF(NETDEV_CHANGE): ens1f0: link becomes ready
[ 765.711892] IPv6: ADDRCONF(NETDEV_CHANGE): ens1f1: link becomes ready
[ 766.979230] :test: OK
[ 768.125419] :test: OK
[ 768.127519] :test: - disable sriov ens1f1
[ 768.131160] pci 0000:81:02.2: Removing from iommu group 75
[ 768.132646] pci 0000:81:02.3: Removing from iommu group 76
[ 769.179749] mlx5_core 0000:81:00.1: E-Switch: Disable: mode(OFFLOADS), nvfs(2), active vports(3)
[ 769.455627] mlx5_core 0000:81:00.0: modify lag map port 1:1 port 2:1
[ 769.703990] mlx5_core 0000:81:00.1: MLX5E: StrdRq(1) RqSz(8) StrdSz(2048) RxCqeCmprss(0)
[ 769.988637] mlx5_core 0000:81:00.1 ens1f1: renamed from eth0
[ 769.990022] :test: - disable sriov ens1f0
[ 769.994922] pci 0000:81:00.2: Removing from iommu group 73
[ 769.997048] pci 0000:81:00.3: Removing from iommu group 74
[ 771.035813] mlx5_core 0000:81:00.0: E-Switch: Disable: mode(OFFLOADS), nvfs(2), active vports(3)
[ 771.339091] ------------[ cut here ]------------
[ 771.340812] WARNING: CPU: 6 PID: 3448 at net/sched/cls_api.c:749 tcf_block_offload_unbind.isra.0+0x5c/0x60
[ 771.341728] Modules linked in: act_mirred act_tunnel_key cls_flower dummy vxlan ip6_udp_tunnel udp_tunnel sch_ingress nfsv3 nfs_acl nfs lockd grace fscache tun bridge stp llc sunrpc rdma_ucm rdma_cm iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core intel_rapl_msr intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp mlxfw act_ct nf_flow_table kvm_intel nf_nat kvm nf_conntrack irqbypass crct10dif_pclmul igb crc32_pclmul nf_defrag_ipv6 libcrc32c nf_defrag_ipv4 crc32c_intel ghash_clmulni_intel ptp ipmi_ssif intel_cstate pps_c
ore ses intel_uncore mei_me iTCO_wdt joydev ipmi_si iTCO_vendor_support i2c_i801 enclosure mei ioatdma dca lpc_ich wmi ipmi_devintf pcspkr acpi_power_meter ipmi_msghandler acpi_pad ast i2c_algo_bit drm_vram_helper drm_kms_helper drm_ttm_helper ttm drm mpt3sas raid_class scsi_transport_sas
[ 771.347818] CPU: 6 PID: 3448 Comm: test-ecmp-add-v Not tainted 5.7.0+ #1146
[ 771.348727] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017
[ 771.349646] RIP: 0010:tcf_block_offload_unbind.isra.0+0x5c/0x60
[ 771.350553] Code: 4a fd ff ff 83 f8 a1 74 0e 5b 4c 89 e7 5d 41 5c 41 5d e9 07 93 89 ff 8b 83 a0 00 00 00 8d 50 ff 89 93 a0 00 00 00 85 c0 75 df <0f> 0b eb db 0f 1f 44 00 00 41 57 41 56 41 55 41 89 cd 41 54 49 89
[ 771.352420] RSP: 0018:ffffb33144cd3b00 EFLAGS: 00010246
[ 771.353353] RAX: 0000000000000000 RBX: ffff8b37cf4b2800 RCX: 0000000000000000
[ 771.354294] RDX: 00000000ffffffff RSI: ffff8b3b9aad0000 RDI: ffffffff8d5c6e20
[ 771.355245] RBP: ffff8b37eb546948 R08: ffffffffc0b7a348 R09: ffff8b3b9aad0000
[ 771.356189] R10: 0000000000000001 R11: ffff8b3ba7a0a1c0 R12: ffff8b37cf4b2850
[ 771.357123] R13: ffff8b3b9aad0000 R14: ffff8b37cf4b2820 R15: ffff8b37cf4b2820
[ 771.358039] FS: 00007f8a19b6e740(0000) GS:ffff8b3befa00000(0000) knlGS:0000000000000000
[ 771.358965] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 771.359885] CR2: 00007f3afb91c1a0 CR3: 000000045133c004 CR4: 00000000001606e0
[ 771.360825] Call Trace:
[ 771.361764] __tcf_block_put+0x84/0x150
[ 771.362712] ingress_destroy+0x1b/0x20 [sch_ingress]
[ 771.363658] qdisc_destroy+0x3e/0xc0
[ 771.364594] dev_shutdown+0x7a/0xa5
[ 771.365522] rollback_registered_many+0x20d/0x530
[ 771.366458] ? netdev_upper_dev_unlink+0x15d/0x1c0
[ 771.367387] unregister_netdevice_many.part.0+0xf/0x70
[ 771.368310] vxlan_netdevice_event+0xa4/0x110 [vxlan]
[ 771.369454] notifier_call_chain+0x4c/0x70
[ 771.370579] rollback_registered_many+0x2f5/0x530
[ 771.371719] rollback_registered+0x56/0x90
[ 771.372843] unregister_netdevice_queue+0x73/0xb0
[ 771.373982] unregister_netdev+0x18/0x20
[ 771.375168] mlx5e_vport_rep_unload+0x56/0xc0 [mlx5_core]
[ 771.376327] esw_offloads_disable+0x81/0x90 [mlx5_core]
[ 771.377512] mlx5_eswitch_disable_locked.cold+0xcb/0x1af [mlx5_core]
[ 771.378679] mlx5_eswitch_disable+0x44/0x60 [mlx5_core]
[ 771.379822] mlx5_device_disable_sriov+0xad/0xb0 [mlx5_core]
[ 771.380968] mlx5_core_sriov_configure+0xc1/0xe0 [mlx5_core]
[ 771.382087] sriov_numvfs_store+0xfc/0x130
[ 771.383195] kernfs_fop_write+0xce/0x1b0
[ 771.384302] vfs_write+0xb6/0x1a0
[ 771.385410] ksys_write+0x5f/0xe0
[ 771.386500] do_syscall_64+0x5b/0x1d0
[ 771.387569] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: 0fdcf78d5973 ("net: use flow_indr_dev_setup_offload()")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
If the representor is removed, then identify the indirect flow_blocks
that need to be removed by the release callback and the port representor
structure. To identify the port representor structure, a new
indr.cb_priv field needs to be introduced. The flow_block also needs to
be removed from the driver list from the cleanup path.
Fixes: 1fac52da5942 ("net: flow_offload: consolidate indirect flow_block infrastructure")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Prepare fix the bug in the next patch. use flow_indr_block_cb_alloc/remove
function and remove the __flow_block_indr_binding.
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Add flow_indr_block_cb_alloc/remove function for next fix patch.
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Currently, trying to change the DF parameter of a geneve device does
nothing:
# ip -d link show geneve1
14: geneve1: <snip>
link/ether <snip>
geneve id 1 remote 10.0.0.1 ttl auto df set dstport 6081 <snip>
# ip link set geneve1 type geneve id 1 df unset
# ip -d link show geneve1
14: geneve1: <snip>
link/ether <snip>
geneve id 1 remote 10.0.0.1 ttl auto df set dstport 6081 <snip>
We just need to update the value in geneve_changelink.
Fixes: a025fb5f49ad ("geneve: Allow configuration of DF behaviour")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
VLAN tag insertion/extraction offload is correctly
activated at probe time but deactivation of this feature
(i.e. via ethtool) is broken. Toggling works only for
Tx/Rx ring 0 of a PF, and is ignored for the other rings,
including the VF rings.
To fix this, the existing VLAN offload toggling code
was extended to all the rings assigned to a netdevice,
instead of the default ring 0 (likely a leftover from the
early validation days of this feature). And the code was
moved to the common set_features() function to fix toggling
for the VF driver too.
Fixes: d4fd0404c1c9 ("enetc: Introduce basic PF and VF ENETC ethernet drivers")
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Undo previously done operation in case macb_phylink_connect()
fails. Since macb_reset_hw() is the 1st undo operation the
napi_exit label was renamed to reset_hw.
Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Commit 02a6efcab675 ("net: phy: allow scanning busses with missing
phys") added a special condition to return -ENODEV in case -ENODEV or
-EIO was returned from the first read of the MII_PHYSID1 register.
In case the MDIO bus data line pull-up is not strong enough, the MDIO
bus controller will not flag this as a read error. This can happen when
a pluggable daughter card is not connected and weak internal pull-ups
are used (since that is the only option, otherwise the pins are
floating).
The second read of MII_PHYSID2 will be correctly flagged an error
though, but now we will return -EIO which will be treated as a hard
error, thus preventing MDIO bus scanning loops to continue succesfully.
Apply the same logic to both register reads, thus allowing the scanning
logic to proceed.
Fixes: 02a6efcab675 ("net: phy: allow scanning busses with missing phys")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Commit 209c65b61d94 ("drivers/of/of_mdio.c:fix of_mdiobus_register()")
introduced a break of the loop on the premise that a successful
registration should exit the loop. The premise is correct but not to
code, because rc && rc != -ENODEV is just a special error condition,
that means we would exit the loop even with rc == -ENODEV which is
absolutely not correct since this is the error code to indicate to the
MDIO bus layer that scanning should continue.
Fix this by explicitly checking for rc = 0 as the only valid condition
to break out of the loop.
Fixes: 209c65b61d94 ("drivers/of/of_mdio.c:fix of_mdiobus_register()")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Fix typo: "Triger" --> "Trigger"
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Update URL to our new home.
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
|
|
We finally came around to setup a new project website.
Update the reference here.
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
|
|
Fix typo: "trigered" --> "triggered"
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
When the AF_XDP buffer allocator was introduced, the Rx SW ring
"rx_bi" allocation was moved from i40e_setup_rx_descriptors()
function, and was instead done in the i40e_configure_rx_ring()
function.
This broke the ethtool set_ringparam() hook for changing the Rx
descriptor count, which was relying on i40e_setup_rx_descriptors() to
handle the allocation.
Fix this by adding an explicit i40e_alloc_rx_bi() call to
i40e_set_ringparam().
Fixes: be1222b585fd ("i40e: Separate kernel allocated rx_bi rings from AF_XDP rings")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
|
|
The READ_ONCE macro is used when reading rings prior to accessing the
statistics pointer. The corresponding WRITE_ONCE usage when allocating and
freeing the rings to ensure protected access was not in place. Introduce
this.
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
|
|
READ_ONCE should be used when reading rings prior to accessing the
statistics pointer. Introduce this as well as the corresponding WRITE_ONCE
usage when allocating and freeing the rings, to ensure protected access.
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
|
|
READ_ONCE should be used when reading rings prior to accessing the
statistics pointer. Introduce this as well as the corresponding WRITE_ONCE
usage when allocating and freeing the rings, to ensure protected access.
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
|
|
Back in commit f60e5990d9c1 ("ipv6: protect skb->sk accesses
from recursive dereference inside the stack") Hannes added code
so that IPv6 stack would not trust skb->sk for typical cases
where packet goes through 'standard' xmit path (__dev_queue_xmit())
Alas af_packet had a dev_direct_xmit() path that was not
dealing yet with xmit_recursion level.
Also change sk_mc_loop() to dump a stack once only.
Without this patch, syzbot was able to trigger :
[1]
[ 153.567378] WARNING: CPU: 7 PID: 11273 at net/core/sock.c:721 sk_mc_loop+0x51/0x70
[ 153.567378] Modules linked in: nfnetlink ip6table_raw ip6table_filter iptable_raw iptable_nat nf_nat nf_conntrack nf_defrag_ipv4 nf_defrag_ipv6 iptable_filter macsec macvtap tap macvlan 8021q hsr wireguard libblake2s blake2s_x86_64 libblake2s_generic udp_tunnel ip6_udp_tunnel libchacha20poly1305 poly1305_x86_64 chacha_x86_64 libchacha curve25519_x86_64 libcurve25519_generic netdevsim batman_adv dummy team bridge stp llc w1_therm wire i2c_mux_pca954x i2c_mux cdc_acm ehci_pci ehci_hcd mlx4_en mlx4_ib ib_uverbs ib_core mlx4_core
[ 153.567386] CPU: 7 PID: 11273 Comm: b159172088 Not tainted 5.8.0-smp-DEV #273
[ 153.567387] RIP: 0010:sk_mc_loop+0x51/0x70
[ 153.567388] Code: 66 83 f8 0a 75 24 0f b6 4f 12 b8 01 00 00 00 31 d2 d3 e0 a9 bf ef ff ff 74 07 48 8b 97 f0 02 00 00 0f b6 42 3a 83 e0 01 5d c3 <0f> 0b b8 01 00 00 00 5d c3 0f b6 87 18 03 00 00 5d c0 e8 04 83 e0
[ 153.567388] RSP: 0018:ffff95c69bb93990 EFLAGS: 00010212
[ 153.567388] RAX: 0000000000000011 RBX: ffff95c6e0ee3e00 RCX: 0000000000000007
[ 153.567389] RDX: ffff95c69ae50000 RSI: ffff95c6c30c3000 RDI: ffff95c6c30c3000
[ 153.567389] RBP: ffff95c69bb93990 R08: ffff95c69a77f000 R09: 0000000000000008
[ 153.567389] R10: 0000000000000040 R11: 00003e0e00026128 R12: ffff95c6c30c3000
[ 153.567390] R13: ffff95c6cc4fd500 R14: ffff95c6f84500c0 R15: ffff95c69aa13c00
[ 153.567390] FS: 00007fdc3a283700(0000) GS:ffff95c6ff9c0000(0000) knlGS:0000000000000000
[ 153.567390] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 153.567391] CR2: 00007ffee758e890 CR3: 0000001f9ba20003 CR4: 00000000001606e0
[ 153.567391] Call Trace:
[ 153.567391] ip6_finish_output2+0x34e/0x550
[ 153.567391] __ip6_finish_output+0xe7/0x110
[ 153.567391] ip6_finish_output+0x2d/0xb0
[ 153.567392] ip6_output+0x77/0x120
[ 153.567392] ? __ip6_finish_output+0x110/0x110
[ 153.567392] ip6_local_out+0x3d/0x50
[ 153.567392] ipvlan_queue_xmit+0x56c/0x5e0
[ 153.567393] ? ksize+0x19/0x30
[ 153.567393] ipvlan_start_xmit+0x18/0x50
[ 153.567393] dev_direct_xmit+0xf3/0x1c0
[ 153.567393] packet_direct_xmit+0x69/0xa0
[ 153.567394] packet_sendmsg+0xbf0/0x19b0
[ 153.567394] ? plist_del+0x62/0xb0
[ 153.567394] sock_sendmsg+0x65/0x70
[ 153.567394] sock_write_iter+0x93/0xf0
[ 153.567394] new_sync_write+0x18e/0x1a0
[ 153.567395] __vfs_write+0x29/0x40
[ 153.567395] vfs_write+0xb9/0x1b0
[ 153.567395] ksys_write+0xb1/0xe0
[ 153.567395] __x64_sys_write+0x1a/0x20
[ 153.567395] do_syscall_64+0x43/0x70
[ 153.567396] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 153.567396] RIP: 0033:0x453549
[ 153.567396] Code: Bad RIP value.
[ 153.567396] RSP: 002b:00007fdc3a282cc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 153.567397] RAX: ffffffffffffffda RBX: 00000000004d32d0 RCX: 0000000000453549
[ 153.567397] RDX: 0000000000000020 RSI: 0000000020000300 RDI: 0000000000000003
[ 153.567398] RBP: 00000000004d32d8 R08: 0000000000000000 R09: 0000000000000000
[ 153.567398] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004d32dc
[ 153.567398] R13: 00007ffee742260f R14: 00007fdc3a282dc0 R15: 00007fdc3a283700
[ 153.567399] ---[ end trace c1d5ae2b1059ec62 ]---
f60e5990d9c1 ("ipv6: protect skb->sk accesses from recursive dereference inside the stack")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
of_find_node_by_name() will do an of_node_put() on the "from" argument.
With CONFIG_OF_DYNAMIC enabled which checks for device_node reference
counts, we would be getting a warning like this:
[ 6.347230] refcount_t: increment on 0; use-after-free.
[ 6.352498] WARNING: CPU: 3 PID: 77 at lib/refcount.c:156
refcount_inc_checked+0x38/0x44
[ 6.360601] Modules linked in:
[ 6.363661] CPU: 3 PID: 77 Comm: kworker/3:1 Tainted: G W
5.4.46-gb78b3e9956e6 #13
[ 6.372546] Hardware name: BCM97278SV (DT)
[ 6.376649] Workqueue: events deferred_probe_work_func
[ 6.381796] pstate: 60000005 (nZCv daif -PAN -UAO)
[ 6.386595] pc : refcount_inc_checked+0x38/0x44
[ 6.391133] lr : refcount_inc_checked+0x38/0x44
...
[ 6.478791] Call trace:
[ 6.481243] refcount_inc_checked+0x38/0x44
[ 6.485433] kobject_get+0x3c/0x4c
[ 6.488840] of_node_get+0x24/0x34
[ 6.492247] of_irq_find_parent+0x3c/0xe0
[ 6.496263] of_irq_parse_one+0xe4/0x1d0
[ 6.500191] irq_of_parse_and_map+0x44/0x84
[ 6.504381] bcm_sf2_sw_probe+0x22c/0x844
[ 6.508397] platform_drv_probe+0x58/0xa8
[ 6.512413] really_probe+0x238/0x3fc
[ 6.516081] driver_probe_device+0x11c/0x12c
[ 6.520358] __device_attach_driver+0xa8/0x100
[ 6.524808] bus_for_each_drv+0xb4/0xd0
[ 6.528650] __device_attach+0xd0/0x164
[ 6.532493] device_initial_probe+0x24/0x30
[ 6.536682] bus_probe_device+0x38/0x98
[ 6.540524] deferred_probe_work_func+0xa8/0xd4
[ 6.545061] process_one_work+0x178/0x288
[ 6.549078] process_scheduled_works+0x44/0x48
[ 6.553529] worker_thread+0x218/0x270
[ 6.557285] kthread+0xdc/0xe4
[ 6.560344] ret_from_fork+0x10/0x18
[ 6.563925] ---[ end trace 68f65caf69bb152a ]---
Fix this by adding a of_node_get() to increment the reference count
prior to the call.
Fixes: afa3b592953b ("net: dsa: bcm_sf2: Ensure correct sub-node is parsed")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Commit 3b33583265ed ("net: Add fraglist GRO/GSO feature flags") missed
an entry for NETIF_F_GSO_FRAGLIST in netdev_features_strings array. As
a result, fraglist GSO feature is not shown in 'ethtool -k' output and
can't be toggled on/off.
The fix is trivial.
Fixes: 3b33583265ed ("net: Add fraglist GRO/GSO feature flags")
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The driver function tg3_io_error_detected() calls napi_disable twice,
without an intervening napi_enable, when the number of EEH errors exceeds
eeh_max_freezes, resulting in an indefinite sleep while holding rtnl_lock.
Add check for pcierr_recovery which skips code already executed for the
"Frozen" state.
Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Code to handle multiproto configuration is missing.
Fixes: 4b5f67232d95 ("net: Special handling for IP & MPLS")
Signed-off-by: Martin <martin.varghese@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
When a device is configured with ISOLATION_MODE_FWD, traffic never goes
through the internal switch. Don't apply the offload restrictions in
this case.
Fixes: c619e9a6f52f ("s390/qeth: don't use restricted offloads for local traffic")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Current(?) OSA devices also store their cmd-specific return codes for
SET_ACCESS_CONTROL cmds into the top-level cmd->hdr.return_code.
So once we added stricter checking for the top-level field a while ago,
none of the error logic that rolls back the user's configuration to its
old state is applied any longer.
For this specific cmd, go back to the old model where we peek into the
cmd structure even though the top-level field indicated an error.
Fixes: 686c97ee29c8 ("s390/qeth: fix error handling in adapter command callbacks")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Currently any MPTCP socket using syn cookies will fallback to
TCP at 3rd ack time. In case of MP_JOIN requests, the RFC mandate
closing the child and sockets, but the existing error paths
do not handle the syncookie scenario correctly.
Address the issue always forcing the child shutdown in case of
MP_JOIN fallback.
Fixes: ae2dd7164943 ("mptcp: handle tcp fallback when using syn cookies")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The msk ownership is transferred to the child socket at
3rd ack time, so that we avoid more lookups later. If the
request does not reach the 3rd ack, the MSK reference is
dropped at request sock release time.
As a side effect, fallback is now tracked by a NULL msk
reference instead of zeroed 'mp_join' field. This will
simplify the next patch.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
ie.,
$ ifconfig eth0 6.6.6.6 netmask 255.255.255.0
$ ip rule add from 6.6.6.6 table 6666
$ ip route add 9.9.9.9 via 6.6.6.6
$ ping -I 6.6.6.6 9.9.9.9
PING 9.9.9.9 (9.9.9.9) from 6.6.6.6 : 56(84) bytes of data.
3 packets transmitted, 0 received, 100% packet loss, time 2079ms
$ arp
Address HWtype HWaddress Flags Mask Iface
6.6.6.6 (incomplete) eth0
The arp request address is error, this is because fib_table_lookup in
fib_check_nh lookup the destnation 9.9.9.9 nexthop, the scope of
the fib result is RT_SCOPE_LINK,the correct scope is RT_SCOPE_HOST.
Here I add a check of whether this is RT_TABLE_MAIN to solve this problem.
Fixes: 3bfd847203c6 ("net: Use passed in table for nexthop lookups")
Signed-off-by: guodeqing <geffrey.guo@huawei.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This action requires the VLAN awareness state of the switch to be of the
same type as the key that's being added:
- If the switch is unaware of VLAN, then the tc filter key must only
contain the destination MAC address.
- If the switch is VLAN-aware, the key must also contain the VLAN ID and
PCP.
But this check doesn't work unless we verify the VLAN awareness state on
both the "if" and the "else" branches.
Fixes: 834f8933d5dd ("net: dsa: sja1105: implement tc-gate using time-triggered virtual links")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This action requires the VLAN awareness state of the switch to be of the
same type as the key that's being added:
- If the switch is unaware of VLAN, then the tc filter key must only
contain the destination MAC address.
- If the switch is VLAN-aware, the key must also contain the VLAN ID and
PCP.
But this check doesn't work unless we verify the VLAN awareness state on
both the "if" and the "else" branches.
Fixes: dfacc5a23e22 ("net: dsa: sja1105: support flow-based redirection via virtual links")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This shouldn't be there.
Fixes: 834f8933d5dd ("net: dsa: sja1105: implement tc-gate using time-triggered virtual links")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
assigning a dummy value of 'clock_id' to avoid cancellation of the cycle
timer before its initialization was a temporary solution, and we still
need to handle the case where act_gate timer parameters are changed by
commands like the following one:
# tc action replace action gate <parameters>
the fix consists in the following items:
1) remove the workaround assignment of 'clock_id', and init the list of
entries before the first error path after IDR atomic check/allocation
2) validate 'clock_id' earlier: there is no need to do IDR atomic
check/allocation if we know that 'clock_id' is a bad value
3) use a dedicated function, 'gate_setup_timer()', to ensure that the
timer is cancelled and re-initialized on action overwrite, and also
ensure we initialize the timer in the error path of tcf_gate_init()
v3: improve comment in the error path of tcf_gate_init() (thanks to
Vladimir Oltean)
v2: avoid 'goto' in gate_setup_timer (thanks to Cong Wang)
CC: Ivan Vecera <ivecera@redhat.com>
Fixes: a01c245438c5 ("net/sched: fix a couple of splats in the error path of tfc_gate_init()")
Fixes: a51c328df310 ("net: qos: introduce a gate control flow action")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
it is possible to see a KASAN use-after-free, immediately followed by a
NULL dereference crash, with the following command:
# tc action add action gate index 3 cycle-time 100000000ns \
> cycle-time-ext 100000000ns clockid CLOCK_TAI
BUG: KASAN: use-after-free in tcf_action_init_1+0x8eb/0x960
Write of size 1 at addr ffff88810a5908bc by task tc/883
CPU: 0 PID: 883 Comm: tc Not tainted 5.7.0+ #188
Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014
Call Trace:
dump_stack+0x75/0xa0
print_address_description.constprop.6+0x1a/0x220
kasan_report.cold.9+0x37/0x7c
tcf_action_init_1+0x8eb/0x960
tcf_action_init+0x157/0x2a0
tcf_action_add+0xd9/0x2f0
tc_ctl_action+0x2a3/0x39d
rtnetlink_rcv_msg+0x5f3/0x920
netlink_rcv_skb+0x120/0x380
netlink_unicast+0x439/0x630
netlink_sendmsg+0x714/0xbf0
sock_sendmsg+0xe2/0x110
____sys_sendmsg+0x5b4/0x890
___sys_sendmsg+0xe9/0x160
__sys_sendmsg+0xd3/0x170
do_syscall_64+0x9a/0x370
entry_SYSCALL_64_after_hwframe+0x44/0xa9
[...]
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 PID: 883 Comm: tc Tainted: G B 5.7.0+ #188
Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014
RIP: 0010:tcf_action_fill_size+0xa3/0xf0
[....]
RSP: 0018:ffff88813a48f250 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000094 RCX: ffffffffa47c3eb6
RDX: 000000000000000e RSI: 0000000000000008 RDI: 0000000000000070
RBP: ffff88810a590800 R08: 0000000000000004 R09: ffffed1027491e03
R10: 0000000000000003 R11: ffffed1027491e03 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88810a590800
FS: 00007f62cae8ce40(0000) GS:ffff888147c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f62c9d20a10 CR3: 000000013a52a000 CR4: 0000000000340ef0
Call Trace:
tcf_action_init+0x172/0x2a0
tcf_action_add+0xd9/0x2f0
tc_ctl_action+0x2a3/0x39d
rtnetlink_rcv_msg+0x5f3/0x920
netlink_rcv_skb+0x120/0x380
netlink_unicast+0x439/0x630
netlink_sendmsg+0x714/0xbf0
sock_sendmsg+0xe2/0x110
____sys_sendmsg+0x5b4/0x890
___sys_sendmsg+0xe9/0x160
__sys_sendmsg+0xd3/0x170
do_syscall_64+0x9a/0x370
entry_SYSCALL_64_after_hwframe+0x44/0xa9
this is caused by the test on 'cycletime_ext', that is still unassigned
when the action is newly created. This makes the action .init() return 0
without calling tcf_idr_insert(), hence the UAF + crash.
rework the logic that prevents zero values of cycle-time, as follows:
1) 'tcfg_cycletime_ext' seems to be unused in the action software path,
and it was already possible by other means to obtain non-zero
cycletime and zero cycletime-ext. So, removing that test should not
cause any damage.
2) while at it, we must prevent overwriting configuration data with wrong
ones: use a temporary variable for 'tcfg_cycletime', and validate it
preserving the original semantic (that allowed computing the cycle
time as the sum of all intervals, when not specified by
TCA_GATE_CYCLE_TIME).
3) remove the test on 'tcfg_cycletime', no more useful, and avoid
returning -EFAULT, which did not seem an appropriate return value for
a wrong netlink attribute.
v3: fix uninitialized 'cycletime' (thanks to Vladimir Oltean)
v2: remove useless 'return;' at the end of void gate_get_start_time()
Fixes: a51c328df310 ("net: qos: introduce a gate control flow action")
CC: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
In the datapath, the ip_tunnel_lookup() is used and it internally uses
fallback tunnel device pointer, which is fb_tunnel_dev.
This pointer variable should be set to NULL when a fb interface is deleted.
But there is no routine to set fb_tunnel_dev pointer to NULL.
So, this pointer will be still used after interface is deleted and
it eventually results in the use-after-free problem.
Test commands:
ip netns add A
ip netns add B
ip link add eth0 type veth peer name eth1
ip link set eth0 netns A
ip link set eth1 netns B
ip netns exec A ip link set lo up
ip netns exec A ip link set eth0 up
ip netns exec A ip link add gre1 type gre local 10.0.0.1 \
remote 10.0.0.2
ip netns exec A ip link set gre1 up
ip netns exec A ip a a 10.0.100.1/24 dev gre1
ip netns exec A ip a a 10.0.0.1/24 dev eth0
ip netns exec B ip link set lo up
ip netns exec B ip link set eth1 up
ip netns exec B ip link add gre1 type gre local 10.0.0.2 \
remote 10.0.0.1
ip netns exec B ip link set gre1 up
ip netns exec B ip a a 10.0.100.2/24 dev gre1
ip netns exec B ip a a 10.0.0.2/24 dev eth1
ip netns exec A hping3 10.0.100.2 -2 --flood -d 60000 &
ip netns del B
Splat looks like:
[ 77.793450][ C3] ==================================================================
[ 77.794702][ C3] BUG: KASAN: use-after-free in ip_tunnel_lookup+0xcc4/0xf30
[ 77.795573][ C3] Read of size 4 at addr ffff888060bd9c84 by task hping3/2905
[ 77.796398][ C3]
[ 77.796664][ C3] CPU: 3 PID: 2905 Comm: hping3 Not tainted 5.8.0-rc1+ #616
[ 77.797474][ C3] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 77.798453][ C3] Call Trace:
[ 77.798815][ C3] <IRQ>
[ 77.799142][ C3] dump_stack+0x9d/0xdb
[ 77.799605][ C3] print_address_description.constprop.7+0x2cc/0x450
[ 77.800365][ C3] ? ip_tunnel_lookup+0xcc4/0xf30
[ 77.800908][ C3] ? ip_tunnel_lookup+0xcc4/0xf30
[ 77.801517][ C3] ? ip_tunnel_lookup+0xcc4/0xf30
[ 77.802145][ C3] kasan_report+0x154/0x190
[ 77.802821][ C3] ? ip_tunnel_lookup+0xcc4/0xf30
[ 77.803503][ C3] ip_tunnel_lookup+0xcc4/0xf30
[ 77.804165][ C3] __ipgre_rcv+0x1ab/0xaa0 [ip_gre]
[ 77.804862][ C3] ? rcu_read_lock_sched_held+0xc0/0xc0
[ 77.805621][ C3] gre_rcv+0x304/0x1910 [ip_gre]
[ 77.806293][ C3] ? lock_acquire+0x1a9/0x870
[ 77.806925][ C3] ? gre_rcv+0xfe/0x354 [gre]
[ 77.807559][ C3] ? erspan_xmit+0x2e60/0x2e60 [ip_gre]
[ 77.808305][ C3] ? rcu_read_lock_sched_held+0xc0/0xc0
[ 77.809032][ C3] ? rcu_read_lock_held+0x90/0xa0
[ 77.809713][ C3] gre_rcv+0x1b8/0x354 [gre]
[ ... ]
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Fixes: c54419321455 ("GRE: Refactor GRE tunneling code.")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
In the datapath, the ip6gre_tunnel_lookup() is used and it internally uses
fallback tunnel device pointer, which is fb_tunnel_dev.
This pointer variable should be set to NULL when a fb interface is deleted.
But there is no routine to set fb_tunnel_dev pointer to NULL.
So, this pointer will be still used after interface is deleted and
it eventually results in the use-after-free problem.
Test commands:
ip netns add A
ip netns add B
ip link add eth0 type veth peer name eth1
ip link set eth0 netns A
ip link set eth1 netns B
ip netns exec A ip link set lo up
ip netns exec A ip link set eth0 up
ip netns exec A ip link add ip6gre1 type ip6gre local fc:0::1 \
remote fc:0::2
ip netns exec A ip -6 a a fc:100::1/64 dev ip6gre1
ip netns exec A ip link set ip6gre1 up
ip netns exec A ip -6 a a fc:0::1/64 dev eth0
ip netns exec A ip link set ip6gre0 up
ip netns exec B ip link set lo up
ip netns exec B ip link set eth1 up
ip netns exec B ip link add ip6gre1 type ip6gre local fc:0::2 \
remote fc:0::1
ip netns exec B ip -6 a a fc:100::2/64 dev ip6gre1
ip netns exec B ip link set ip6gre1 up
ip netns exec B ip -6 a a fc:0::2/64 dev eth1
ip netns exec B ip link set ip6gre0 up
ip netns exec A ping fc:100::2 -s 60000 &
ip netns del B
Splat looks like:
[ 73.087285][ C1] BUG: KASAN: use-after-free in ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre]
[ 73.088361][ C1] Read of size 4 at addr ffff888040559218 by task ping/1429
[ 73.089317][ C1]
[ 73.089638][ C1] CPU: 1 PID: 1429 Comm: ping Not tainted 5.7.0+ #602
[ 73.090531][ C1] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 73.091725][ C1] Call Trace:
[ 73.092160][ C1] <IRQ>
[ 73.092556][ C1] dump_stack+0x96/0xdb
[ 73.093122][ C1] print_address_description.constprop.6+0x2cc/0x450
[ 73.094016][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre]
[ 73.094894][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre]
[ 73.095767][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre]
[ 73.096619][ C1] kasan_report+0x154/0x190
[ 73.097209][ C1] ? ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre]
[ 73.097989][ C1] ip6gre_tunnel_lookup+0x1064/0x13f0 [ip6_gre]
[ 73.098750][ C1] ? gre_del_protocol+0x60/0x60 [gre]
[ 73.099500][ C1] gre_rcv+0x1c5/0x1450 [ip6_gre]
[ 73.100199][ C1] ? ip6gre_header+0xf00/0xf00 [ip6_gre]
[ 73.100985][ C1] ? rcu_read_lock_sched_held+0xc0/0xc0
[ 73.101830][ C1] ? ip6_input_finish+0x5/0xf0
[ 73.102483][ C1] ip6_protocol_deliver_rcu+0xcbb/0x1510
[ 73.103296][ C1] ip6_input_finish+0x5b/0xf0
[ 73.103920][ C1] ip6_input+0xcd/0x2c0
[ 73.104473][ C1] ? ip6_input_finish+0xf0/0xf0
[ 73.105115][ C1] ? rcu_read_lock_held+0x90/0xa0
[ 73.105783][ C1] ? rcu_read_lock_sched_held+0xc0/0xc0
[ 73.106548][ C1] ipv6_rcv+0x1f1/0x300
[ ... ]
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
In the current code, ->ndo_start_xmit() can be executed recursively only
10 times because of stack memory.
But, in the case of the vxlan, 10 recursion limit value results in
a stack overflow.
In the current code, the nested interface is limited by 8 depth.
There is no critical reason that the recursion limitation value should
be 10.
So, it would be good to be the same value with the limitation value of
nesting interface depth.
Test commands:
ip link add vxlan10 type vxlan vni 10 dstport 4789 srcport 4789 4789
ip link set vxlan10 up
ip a a 192.168.10.1/24 dev vxlan10
ip n a 192.168.10.2 dev vxlan10 lladdr fc:22:33:44:55:66 nud permanent
for i in {9..0}
do
let A=$i+1
ip link add vxlan$i type vxlan vni $i dstport 4789 srcport 4789 4789
ip link set vxlan$i up
ip a a 192.168.$i.1/24 dev vxlan$i
ip n a 192.168.$i.2 dev vxlan$i lladdr fc:22:33:44:55:66 nud permanent
bridge fdb add fc:22:33:44:55:66 dev vxlan$A dst 192.168.$i.2 self
done
hping3 192.168.10.2 -2 -d 60000
Splat looks like:
[ 103.814237][ T1127] =============================================================================
[ 103.871955][ T1127] BUG kmalloc-2k (Tainted: G B ): Padding overwritten. 0x00000000897a2e4f-0x000
[ 103.873187][ T1127] -----------------------------------------------------------------------------
[ 103.873187][ T1127]
[ 103.874252][ T1127] INFO: Slab 0x000000005cccc724 objects=5 used=5 fp=0x0000000000000000 flags=0x10000000001020
[ 103.881323][ T1127] CPU: 3 PID: 1127 Comm: hping3 Tainted: G B 5.7.0+ #575
[ 103.882131][ T1127] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 103.883006][ T1127] Call Trace:
[ 103.883324][ T1127] dump_stack+0x96/0xdb
[ 103.883716][ T1127] slab_err+0xad/0xd0
[ 103.884106][ T1127] ? _raw_spin_unlock+0x1f/0x30
[ 103.884620][ T1127] ? get_partial_node.isra.78+0x140/0x360
[ 103.885214][ T1127] slab_pad_check.part.53+0xf7/0x160
[ 103.885769][ T1127] ? pskb_expand_head+0x110/0xe10
[ 103.886316][ T1127] check_slab+0x97/0xb0
[ 103.886763][ T1127] alloc_debug_processing+0x84/0x1a0
[ 103.887308][ T1127] ___slab_alloc+0x5a5/0x630
[ 103.887765][ T1127] ? pskb_expand_head+0x110/0xe10
[ 103.888265][ T1127] ? lock_downgrade+0x730/0x730
[ 103.888762][ T1127] ? pskb_expand_head+0x110/0xe10
[ 103.889244][ T1127] ? __slab_alloc+0x3e/0x80
[ 103.889675][ T1127] __slab_alloc+0x3e/0x80
[ 103.890108][ T1127] __kmalloc_node_track_caller+0xc7/0x420
[ ... ]
Fixes: 11a766ce915f ("net: Increase xmit RECURSION_LIMIT to 10.")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
I got a memleak report when doing some fuzz test:
unreferenced object 0xffff888112584000 (size 13599):
comm "ip", pid 3048, jiffies 4294911734 (age 343.491s)
hex dump (first 32 bytes):
74 61 70 30 00 00 00 00 00 00 00 00 00 00 00 00 tap0............
00 ee d9 19 81 88 ff ff 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000002f60ba65>] __kmalloc_node+0x309/0x3a0
[<0000000075b211ec>] kvmalloc_node+0x7f/0xc0
[<00000000d3a97396>] alloc_netdev_mqs+0x76/0xfc0
[<00000000609c3655>] __tun_chr_ioctl+0x1456/0x3d70
[<000000001127ca24>] ksys_ioctl+0xe5/0x130
[<00000000b7d5e66a>] __x64_sys_ioctl+0x6f/0xb0
[<00000000e1023498>] do_syscall_64+0x56/0xa0
[<000000009ec0eb12>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
unreferenced object 0xffff888111845cc0 (size 8):
comm "ip", pid 3048, jiffies 4294911734 (age 343.491s)
hex dump (first 8 bytes):
74 61 70 30 00 88 ff ff tap0....
backtrace:
[<000000004c159777>] kstrdup+0x35/0x70
[<00000000d8b496ad>] kstrdup_const+0x3d/0x50
[<00000000494e884a>] kvasprintf_const+0xf1/0x180
[<0000000097880a2b>] kobject_set_name_vargs+0x56/0x140
[<000000008fbdfc7b>] dev_set_name+0xab/0xe0
[<000000005b99e3b4>] netdev_register_kobject+0xc0/0x390
[<00000000602704fe>] register_netdevice+0xb61/0x1250
[<000000002b7ca244>] __tun_chr_ioctl+0x1cd1/0x3d70
[<000000001127ca24>] ksys_ioctl+0xe5/0x130
[<00000000b7d5e66a>] __x64_sys_ioctl+0x6f/0xb0
[<00000000e1023498>] do_syscall_64+0x56/0xa0
[<000000009ec0eb12>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
unreferenced object 0xffff88811886d800 (size 512):
comm "ip", pid 3048, jiffies 4294911734 (age 343.491s)
hex dump (first 32 bytes):
00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........
ff ff ff ff ff ff ff ff c0 66 3d a3 ff ff ff ff .........f=.....
backtrace:
[<0000000050315800>] device_add+0x61e/0x1950
[<0000000021008dfb>] netdev_register_kobject+0x17e/0x390
[<00000000602704fe>] register_netdevice+0xb61/0x1250
[<000000002b7ca244>] __tun_chr_ioctl+0x1cd1/0x3d70
[<000000001127ca24>] ksys_ioctl+0xe5/0x130
[<00000000b7d5e66a>] __x64_sys_ioctl+0x6f/0xb0
[<00000000e1023498>] do_syscall_64+0x56/0xa0
[<000000009ec0eb12>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
If call_netdevice_notifiers() failed, then rollback_registered()
calls netdev_unregister_kobject() which holds the kobject. The
reference cannot be put because the netdev won't be add to todo
list, so it will leads a memleak, we need put the reference to
avoid memleak.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|