INFO: task syz-executor.2:29230 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211207-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26536 pid:29230 ppid: 19970 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4983 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6293
schedule+0xd2/0x260 kernel/sched/core.c:6366
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9903
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2c20 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x34c/0x28b0 kernel/signal.c:2859
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f51425d0af9
RSP: 002b:00007f5141546218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f51426e3f68 RCX: 00007f51425d0af9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f51426e3f68
RBP: 00007f51426e3f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f51426e3f6c
R13: 00007ffc28cac20f R14: 00007f5141546300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb828a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6230:
#0: ffff88801c97aaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:994
3 locks held by kworker/u4:1/19773:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-next-20211207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8729 Comm: kworker/u4:7 Not tainted 5.16.0-rc4-next-20211207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy17 ieee80211_iface_work
RIP: 0010:unwind_next_frame+0x3c9/0x1ce0 arch/x86/kernel/unwind_orc.c:456
Code: 85 ba 12 00 00 41 c6 46 34 01 49 c7 c0 a0 a1 9f 8b 4d 8d 78 04 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 bd 08 00 00 41 0f b6 40
RSP: 0018:ffffc90002a7f750 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: 1ffff9200054fef2 RCX: ffffffff87313b0e
RDX: 1ffffffff1d063cc RSI: ffffffff8e831e5c RDI: ffffffff8ded4928
RBP: 0000000000000001 R08: ffffffff8e831e5c R09: 0000000000000001
R10: fffff5200054ff10 R11: 000000000008808a R12: ffffc90002a7f870
R13: ffffc90002a7f85d R14: ffffc90002a7f828 R15: ffffffff8e831e60
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00014d000 CR3: 00000000707e4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000b8fecd19 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:236 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754
slab_free mm/slub.c:3510 [inline]
kmem_cache_free+0xdd/0x580 mm/slub.c:3527
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:700
__kfree_skb net/core/skbuff.c:757 [inline]
kfree_skb net/core/skbuff.c:774 [inline]
kfree_skb+0x140/0x3f0 net/core/skbuff.c:768
ieee80211_iface_work+0x411/0xd00 net/mac80211/iface.c:1583
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2318
worker_thread+0x658/0x11f0 kernel/workqueue.c:2465
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 85 ba 12 00 00 41 test %edi,0x41000012(%rdx)
6: c6 46 34 01 movb $0x1,0x34(%rsi)
a: 49 c7 c0 a0 a1 9f 8b mov $0xffffffff8b9fa1a0,%r8
11: 4d 8d 78 04 lea 0x4(%r8),%r15
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 4c 89 fa mov %r15,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
* 2a: 4c 89 fa mov %r15,%rdx <-- trapping instruction
2d: 83 e2 07 and $0x7,%edx
30: 38 d0 cmp %dl,%al
32: 7f 08 jg 0x3c
34: 84 c0 test %al,%al
36: 0f 85 bd 08 00 00 jne 0x8f9
3c: 41 rex.B
3d: 0f .byte 0xf
3e: b6 40 mov $0x40,%dh