INFO: task syz-executor.1:29200 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28256 pid:29200 ppid: 11080 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
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/0x21d0 kernel/signal.c:2820
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: 0033:0x7f013260cae9
RSP: 002b:00007f012fb40218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f01327200e8 RCX: 00007f013260cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f01327200e8
RBP: 00007f01327200e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01327200ec
R13: 00007fff868268af R14: 00007f012fb40300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b980ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461
1 lock held by in:imklog/6168:
#0: ffff88801f8173b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
3 locks held by kworker/u4:8/21389:
#0: ffff8880b9c39b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffffc90003a6fdb0 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff8880b9c28298 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:946
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
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: 2924 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_atomic_add_negative arch/x86/include/asm/atomic.h:152 [inline]
RIP: 0010:atomic_add_negative include/linux/atomic/atomic-instrumented.h:557 [inline]
RIP: 0010:get_ucounts_or_wrap kernel/ucount.c:156 [inline]
RIP: 0010:get_ucounts+0x21/0x60 kernel/ucount.c:161
Code: ff 0f 1f 84 00 00 00 00 00 41 54 49 89 fc 53 e8 25 8d 28 00 49 8d 7c 24 1c be 04 00 00 00 e8 06 ab 6e 00 f0 41 83 44 24 1c 01 <0f> 98 c3 31 ff 89 de e8 23 95 28 00 84 db 75 0c e8 fa 8c 28 00 4c
RSP: 0018:ffffc90001b37e38 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000309 RCX: ffffffff814e719a
RDX: fffffbfff170a478 RSI: 0000000000000004 RDI: ffffffff8b8523bc
RBP: ffff8880772b9c00 R08: 0000000000000001 R09: ffffffff8b8523bf
R10: fffffbfff170a477 R11: 0000000000000000 R12: ffffffff8b8523a0
R13: ffff888074b72fa0 R14: ffffffff8b83e9a4 R15: 0000000000000000
FS: 00007f842c9688c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f842a032000 CR3: 00000000772c5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
prepare_creds+0x52d/0x7b0 kernel/cred.c:287
access_override_creds fs/open.c:351 [inline]
do_faccessat+0x3f4/0x850 fs/open.c:415
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: 0033:0x7f842bc239c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffcccd1c598 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffcccd1f4b0 RCX: 00007f842bc239c7
RDX: 00007f842c694a00 RSI: 0000000000000000 RDI: 0000562625b559a3
RBP: 00007ffcccd1c5d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffcccd1f4b0 R15: 00007ffcccd1cac0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
7: 00
8: 41 54 push %r12
a: 49 89 fc mov %rdi,%r12
d: 53 push %rbx
e: e8 25 8d 28 00 callq 0x288d38
13: 49 8d 7c 24 1c lea 0x1c(%r12),%rdi
18: be 04 00 00 00 mov $0x4,%esi
1d: e8 06 ab 6e 00 callq 0x6eab28
22: f0 41 83 44 24 1c 01 lock addl $0x1,0x1c(%r12)
* 29: 0f 98 c3 sets %bl <-- trapping instruction
2c: 31 ff xor %edi,%edi
2e: 89 de mov %ebx,%esi
30: e8 23 95 28 00 callq 0x289558
35: 84 db test %bl,%bl
37: 75 0c jne 0x45
39: e8 fa 8c 28 00 callq 0x288d38
3e: 4c rex.WR