INFO: task syz-executor.5:19033 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:26576 pid:19033 ppid: 8438 flags:0x00004006
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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6400
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9746
io_uring_clean_tctx fs/io_uring.c:9762 [inline]
io_uring_cancel_generic+0x5d5/0x690 fs/io_uring.c:9851
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: 0033:0x7fe6778baae9
RSP: 002b:00007fe674e30188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 000000000003fe13 RBX: 00007fe6779cdf60 RCX: 00007fe6778baae9
RDX: 0000000020004582 RSI: 0000000020004b40 RDI: 0000000000000006
RBP: 00007fe677914f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe34a86fdf R14: 00007fe674e30300 R15: 0000000000022000
INFO: task syz-executor.5:19038 can't die for more than 143 seconds.
task:syz-executor.5 state:R running task stack:27224 pid:19038 ppid: 8438 flags:0x00004006
Call Trace:
Showing all locks held in the system:
1 lock held by ksoftirqd/0/13:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
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
1 lock held by systemd-journal/2962:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
1 lock held by in:imklog/6220:
#0: ffff8880153e6af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.5/19033:
#0: ffff8880815c40a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9746
3 locks held by syz-executor.5/19038:
=============================================
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: 2962 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:__lock_acquire+0x3f/0x54a0 kernel/locking/lockdep.c:4885
Code: 48 89 fb 48 81 ec e8 00 00 00 48 8b 84 24 20 01 00 00 48 c7 84 24 88 00 00 00 b3 8a b5 41 48 c7 84 24 90 00 00 00 35 23 37 8b <48> c7 84 24 98 00 00 00 50 9d 5c 81 44 89 44 24 08 48 89 44 24 20
RSP: 0018:ffffc90001aefce0 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffffffff8bb83aa0 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8bb83aa0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
FS: 00007fd04447d8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd041965000 CR3: 000000001b059000 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]
__task_pid_nr_ns+0x3d/0x4b0 kernel/pid.c:497
task_tgid_vnr include/linux/sched.h:1594 [inline]
__do_sys_getpid+0x1a/0x20 kernel/sys.c:926
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: 0033:0x7fd043715f17
Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ffd1c5015b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00005614667551e0 RCX: 00007fd043715f17
RDX: 0000000000000000 RSI: 0000000070109498 RDI: 00005614667551e0
RBP: 0000000000000b92 R08: 0000561466757218 R09: 00005614667557b8
R10: 0000561466755780 R11: 0000000000000202 R12: ffffffffffffffff
R13: 00007ffd1c501668 R14: 0000561466255958 R15: 0005d0d5a058134f
----------------
Code disassembly (best guess):
0: 48 89 fb mov %rdi,%rbx
3: 48 81 ec e8 00 00 00 sub $0xe8,%rsp
a: 48 8b 84 24 20 01 00 mov 0x120(%rsp),%rax
11: 00
12: 48 c7 84 24 88 00 00 movq $0x41b58ab3,0x88(%rsp)
19: 00 b3 8a b5 41
1e: 48 c7 84 24 90 00 00 movq $0xffffffff8b372335,0x90(%rsp)
25: 00 35 23 37 8b
* 2a: 48 c7 84 24 98 00 00 movq $0xffffffff815c9d50,0x98(%rsp) <-- trapping instruction
31: 00 50 9d 5c 81
36: 44 89 44 24 08 mov %r8d,0x8(%rsp)
3b: 48 89 44 24 20 mov %rax,0x20(%rsp)