INFO: task syz-executor.0:16736 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211105-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28480 pid:16736 ppid: 6548 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2830
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: 0033:0x7f84179b3ae9
RSP: 002b:00007f8414ec6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f8417ac71a8 RCX: 00007f84179b3ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8417ac71a8
RBP: 00007f8417ac71a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8417ac71ac
R13: 00007ffc342b1ddf R14: 00007f8414ec6300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
no locks held by rs:main Q:Reg/6237.
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211105-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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.15.0-next-20211105-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:task_irq_context kernel/locking/lockdep.c:4534 [inline]
RIP: 0010:__lock_acquire+0x32c/0x54a0 kernel/locking/lockdep.c:4965
Code: f9 a5 7e 85 c0 0f 95 c0 48 c1 e9 03 83 e6 07 0f b6 0c 11 48 89 f2 0f b6 c0 83 c2 03 01 c0 38 ca 7c 08 84 c9 0f 85 70 12 00 00 <41> 83 bd 4c 0a 00 00 01 49 8d 7c 24 24 44 8b 8c 24 30 01 00 00 48
RSP: 0018:ffffc90000cf7a60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8bb83a60 RCX: 0000000000000000
RDX: 0000000000000007 RSI: 0000000000000004 RDI: ffff8880118ca808
RBP: 0000000000000000 R08: 1ffff110023194fe R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880118ca7f8
R13: ffff8880118c9d40 R14: 0000000000000002 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe905412000 CR3: 000000006f9d5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: f9 stc
1: a5 movsl %ds:(%rsi),%es:(%rdi)
2: 7e 85 jle 0xffffff89
4: c0 0f 95 rorb $0x95,(%rdi)
7: c0 48 c1 e9 rorb $0xe9,-0x3f(%rax)
b: 03 83 e6 07 0f b6 add -0x49f0f81a(%rbx),%eax
11: 0c 11 or $0x11,%al
13: 48 89 f2 mov %rsi,%rdx
16: 0f b6 c0 movzbl %al,%eax
19: 83 c2 03 add $0x3,%edx
1c: 01 c0 add %eax,%eax
1e: 38 ca cmp %cl,%dl
20: 7c 08 jl 0x2a
22: 84 c9 test %cl,%cl
24: 0f 85 70 12 00 00 jne 0x129a
* 2a: 41 83 bd 4c 0a 00 00 cmpl $0x1,0xa4c(%r13) <-- trapping instruction
31: 01
32: 49 8d 7c 24 24 lea 0x24(%r12),%rdi
37: 44 8b 8c 24 30 01 00 mov 0x130(%rsp),%r9d
3e: 00
3f: 48 rex.W