INFO: task syz-executor.4:4652 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27648 pid: 4652 ppid: 8415 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:9890
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: 0033:0x7fbfcde20ae9
RSP: 002b:00007fbfccd96218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbfcdf33f68 RCX: 00007fbfcde20ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbfcdf33f68
RBP: 00007fbfcdf33f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbfcdf33f6c
R13: 00007ffd8aa1299f R14: 00007fbfccd96300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by in:imklog/6248:
#0: ffff888072a1b4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff8880b9d39d58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc2-next-20211125-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: 2959 Comm: systemd-journal Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count_sub+0x5f/0x150 kernel/sched/core.c:5483
Code: fc 0e 85 c9 75 1b 65 8b 05 1e 66 b2 7e 89 c2 81 e2 ff ff ff 7f 39 da 7c 13 81 fb fe 00 00 00 76 63 f7 db 65 01 1d 01 66 b2 7e <5b> c3 e8 fa d1 8f 02 85 c0 74 f5 48 c7 c0 08 7e 91 8d 48 ba 00 00
RSP: 0018:ffffc90000dd0790 EFLAGS: 00000297
RAX: 0000000080000101 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 0000000000000101 RSI: ffffc900027eff58 RDI: 0000000000000001
RBP: 00007ffe9ed40b58 R08: ffffffff8ea52f1a R09: 0000000000000001
R10: fffff520001ba11a R11: 000000000008808a R12: ffffc900027e8000
R13: ffffc900027eff58 R14: ffffc90000dd0878 R15: ffffc900027eff58
FS: 00007fbcac70b8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbca9b5e000 CR3: 000000001b0e5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xee1/0x1ce0 arch/x86/kernel/unwind_orc.c:624
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0x103/0x170 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kmem_cache_free+0xba/0x4a0 mm/slub.c:3530
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:700
__kfree_skb net/core/skbuff.c:757 [inline]
consume_skb net/core/skbuff.c:912 [inline]
consume_skb+0xcf/0x160 net/core/skbuff.c:906
mac80211_hwsim_tx_frame+0x1f6/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1785
mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838
__iterate_interfaces+0x1e5/0x560 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829
mac80211_hwsim_beacon+0xcd/0x1c0 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:87 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x2b/0x70 kernel/entry/common.c:108
Code: 54 49 89 f4 55 48 89 fd 48 8b 7c 24 10 e8 cd f5 ff ff eb 27 eb 2b e8 f4 bc 2f f8 e8 2f bb 2f f8 fb 65 48 8b 04 25 40 70 02 00 <48> 8b 70 08 40 f6 c6 3f 75 19 4c 89 e0 5d 41 5c c3 eb 1b 0f 0b eb
RSP: 0018:ffffc900027eff28 EFLAGS: 00000202
RAX: ffff88807bb01d40 RBX: 0000000000000000 RCX: 1ffffffff1b223e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900027eff58 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817e2d88 R11: 0000000000000000 R12: 0000000000000015
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbcab9c69c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe9ed40b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffe9ed43a70 RCX: 00007fbcab9c69c7
RDX: 00007fbcac437a00 RSI: 0000000000000000 RDI: 0000556ba49329a3
RBP: 00007ffe9ed40b90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffe9ed43a70 R15: 00007ffe9ed41080
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 85 c9 test %ecx,%ecx
2: 75 1b jne 0x1f
4: 65 8b 05 1e 66 b2 7e mov %gs:0x7eb2661e(%rip),%eax # 0x7eb26629
b: 89 c2 mov %eax,%edx
d: 81 e2 ff ff ff 7f and $0x7fffffff,%edx
13: 39 da cmp %ebx,%edx
15: 7c 13 jl 0x2a
17: 81 fb fe 00 00 00 cmp $0xfe,%ebx
1d: 76 63 jbe 0x82
1f: f7 db neg %ebx
21: 65 01 1d 01 66 b2 7e add %ebx,%gs:0x7eb26601(%rip) # 0x7eb26629
* 28: 5b pop %rbx <-- trapping instruction
29: c3 retq
2a: e8 fa d1 8f 02 callq 0x28fd229
2f: 85 c0 test %eax,%eax
31: 74 f5 je 0x28
33: 48 c7 c0 08 7e 91 8d mov $0xffffffff8d917e08,%rax
3a: 48 rex.W
3b: ba .byte 0xba