INFO: task syz-executor.5:5781 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211115-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:26280 pid: 5781 ppid: 6812 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6268
schedule+0xd2/0x260 kernel/sched/core.c:6341
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9846
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: 0033:0x7f72a642dae9
RSP: 002b:00007f72a39a3218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f72a6540f68 RCX: 00007f72a642dae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f72a6540f68
RBP: 00007f72a6540f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f72a6540f6c
R13: 00007fffc227238f R14: 00007f72a39a3300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8bb83aa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by in:imklog/6225:
#0: ffff8880727e5770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.0-next-20211115-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: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: 2969 Comm: systemd-journal Not tainted 5.15.0-next-20211115-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:71 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
RIP: 0010:__lock_acquire+0xbbd/0x54a0 kernel/locking/lockdep.c:5024
Code: 7c 24 38 e8 35 0b 62 00 41 0f b7 5c 24 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 00 3a f7 8f 7e 0e 62 00 48 0f a3 1d e6 90 9a 0e 0f 83 f1 0b 00 00 48 8d 1c
RSP: 0018:ffffc90001f5f800 EFLAGS: 00000047
RAX: 0000000000000000 RBX: 0000000000000029 RCX: ffffffff815cad6a
RDX: 1ffff1100f511c49 RSI: 0000000000000008 RDI: ffffffff8ff73a00
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8ff73a07
R10: fffffbfff1fee740 R11: 0000000000000000 R12: ffff88807a88e228
R13: ffff88807a88d7c0 R14: 0000000000000001 R15: ffffffffffffffff
FS: 00007f96806b48c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f967cc7f028 CR3: 000000007f598000 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]
path_init+0x6c8/0x1920 fs/namei.c:2330
path_openat+0x183/0x2750 fs/namei.c:3554
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_open fs/open.c:1236 [inline]
__se_sys_open fs/open.c:1232 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1232
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f967fc43840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffdcb179368 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007ffdcb179670 RCX: 00007f967fc43840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000564129feb930
RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000564129fdf040 R14: 00007ffdcb179630 R15: 0000564129feb750
----------------
Code disassembly (best guess):
0: 7c 24 jl 0x26
2: 38 e8 cmp %ch,%al
4: 35 0b 62 00 41 xor $0x4100620b,%eax
9: 0f b7 5c 24 20 movzwl 0x20(%rsp),%ebx
e: 66 81 e3 ff 1f and $0x1fff,%bx
13: 0f b7 db movzwl %bx,%ebx
16: be 08 00 00 00 mov $0x8,%esi
1b: 48 89 d8 mov %rbx,%rax
1e: 48 c1 f8 06 sar $0x6,%rax
22: 48 8d 3c c5 00 3a f7 lea -0x7008c600(,%rax,8),%rdi
29: 8f
* 2a: e8 7e 0e 62 00 callq 0x620ead <-- trapping instruction
2f: 48 0f a3 1d e6 90 9a bt %rbx,0xe9a90e6(%rip) # 0xe9a911d
36: 0e
37: 0f 83 f1 0b 00 00 jae 0xc2e
3d: 48 rex.W
3e: 8d .byte 0x8d
3f: 1c .byte 0x1c