INFO: task syz-executor.3:29329 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211102-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28504 pid:29329 ppid: 27384 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: 0033:0x7f49966abae9
RSP: 002b:00007f4993c21218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f49967bef68 RCX: 00007f49966abae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f49967bef68
RBP: 00007f49967bef60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f49967bef6c
R13: 00007ffcdcd5242f R14: 00007f4993c21300 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
1 lock held by in:imklog/6186:
#0: ffff88807e274ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211102-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: 2937 Comm: systemd-journal Not tainted 5.15.0-next-20211102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xe40/0x54a0 kernel/locking/lockdep.c:5054
Code: 44 8b 35 3b a9 32 0c 45 85 f6 0f 84 6f 35 a9 07 45 31 f6 48 b8 00 00 00 00 00 fc ff df 48 8b 5c 24 30 48 c7 04 03 00 00 00 00 <48> 8b 84 24 e0 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 1e 2f 00
RSP: 0018:ffffc90001fcf730 EFLAGS: 00000083
RAX: dffffc0000000000 RBX: 1ffff920003f9ef7 RCX: ffffffff815c915f
RDX: 1ffff1100f50489c RSI: 0000000000000001 RDI: ffffffff8f292b58
RBP: 0000000000004e46 R08: 0000000000000000 R09: ffffffff8ff44a1f
R10: fffffbfff1fe8943 R11: 000000000000002f R12: ffff88807a824510
R13: ffff88807a823a80 R14: 0000000000000001 R15: ea569a6c80bcd98d
FS: 00007f2feae048c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2fe7e1c000 CR3: 000000002132d000 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
seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
set_root+0x3be/0x5b0 fs/namei.c:940
nd_jump_root+0x3c8/0x570 fs/namei.c:961
path_init+0x1020/0x1920 fs/namei.c:2359
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: 0033:0x7f2fea393840
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:00007fff62c38e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fff62c391a0 RCX: 00007f2fea393840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005584394c2a20
RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00005584394b5040 R14: 00007fff62c39160 R15: 00005584394c2840
----------------
Code disassembly (best guess):
0: 44 8b 35 3b a9 32 0c mov 0xc32a93b(%rip),%r14d # 0xc32a942
7: 45 85 f6 test %r14d,%r14d
a: 0f 84 6f 35 a9 07 je 0x7a9357f
10: 45 31 f6 xor %r14d,%r14d
13: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1a: fc ff df
1d: 48 8b 5c 24 30 mov 0x30(%rsp),%rbx
22: 48 c7 04 03 00 00 00 movq $0x0,(%rbx,%rax,1)
29: 00
* 2a: 48 8b 84 24 e0 00 00 mov 0xe0(%rsp),%rax <-- trapping instruction
31: 00
32: 65 48 2b 04 25 28 00 sub %gs:0x28,%rax
39: 00 00
3b: 0f .byte 0xf
3c: 85 1e test %ebx,(%rsi)
3e: 2f (bad)