INFO: task syz-executor.4:30050 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:22384 pid:30050 ppid: 12722 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
io_uring_cancel_generic+0x5b3/0x661 fs/io_uring.c:9846
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x281/0x24f0 kernel/exit.c:787
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x1740/0x2120 kernel/signal.c:2852
arch_do_signal_or_restart+0x9c/0x730 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+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9d7c5ccae9
RSP: 002b:00007f9d79b42218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f9d7c6dff68 RCX: 00007f9d7c5ccae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9d7c6dff68
RBP: 00007f9d7c6dff60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d7c6dff6c
R13: 00007fffdafc0e6f R14: 00007f9d79b42300 R15: 0000000000022000
Showing all locks held in the system:
2 locks held by kworker/u4:1/10:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1dd40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/u4:3/701:
2 locks held by in:imklog/6187:
#0: ffff8880232c4870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
#1: ffff8880b9a395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xc6/0x110 kernel/sched/core.c:486
1 lock held by syz-fuzzer/6503:
#0: ffff8880b9a395d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xc6/0x110 kernel/sched/core.c:486
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc2-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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2957 Comm: systemd-journal Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_release+0x3f/0x810 kernel/locking/lockdep.c:5645
Code: 01 00 00 49 89 f6 65 48 8b 04 25 28 00 00 00 48 89 84 24 e0 00 00 00 49 bc 00 00 00 00 00 fc ff df 48 c7 44 24 60 b3 8a b5 41 <48> c7 44 24 68 c2 56 3e 8c 48 c7 44 24 70 b0 09 66 81 4c 8d 6c 24
RSP: 0018:ffffc90001f2f920 EFLAGS: 00000082
RAX: 9e31f5b849b52600 RBX: ffffffff90ebde50 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffffffff841aca50 RDI: ffffffff90ebde68
RBP: ffffc90001f2fa50 R08: dffffc0000000000 R09: 0000000000000003
R10: fffff520003e5f3d R11: 0000000000000004 R12: dffffc0000000000
R13: 1ffff920003e5f4c R14: ffffffff841aca50 R15: 0000000000000246
FS: 00007f989cfa88c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f989a415000 CR3: 000000001cb4d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x75/0x130 kernel/locking/spinlock.c:194
__debug_object_init+0x830/0x1860 lib/debugobjects.c:605
debug_object_init lib/debugobjects.c:620 [inline]
debug_object_activate+0x188/0x6a0 lib/debugobjects.c:706
debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline]
__call_rcu kernel/rcu/tree.c:2969 [inline]
call_rcu+0x93/0xa70 kernel/rcu/tree.c:3065
task_work_run+0x146/0x1c0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f989c537840
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:00007ffffcc46638 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: fffffffffffffffe RBX: 00007ffffcc46940 RCX: 00007f989c537840
RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000556d1374cd50
RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000556d13741040 R14: 00007ffffcc46900 R15: 0000556d1374cda0
----------------
Code disassembly (best guess):
0: 01 00 add %eax,(%rax)
2: 00 49 89 add %cl,-0x77(%rcx)
5: f6 65 48 mulb 0x48(%rbp)
8: 8b 04 25 28 00 00 00 mov 0x28,%eax
f: 48 89 84 24 e0 00 00 mov %rax,0xe0(%rsp)
16: 00
17: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12
1e: fc ff df
21: 48 c7 44 24 60 b3 8a movq $0x41b58ab3,0x60(%rsp)
28: b5 41
* 2a: 48 c7 44 24 68 c2 56 movq $0xffffffff8c3e56c2,0x68(%rsp) <-- trapping instruction
31: 3e 8c
33: 48 c7 44 24 70 b0 09 movq $0xffffffff816609b0,0x70(%rsp)
3a: 66 81
3c: 4c rex.WR
3d: 8d .byte 0x8d
3e: 6c insb (%dx),%es:(%rdi)
3f: 24 .byte 0x24