INFO: task syz-executor.0:2022 blocked for more than 143 seconds.
Not tainted 5.18.0-rc6-next-20220513-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26472 pid: 2022 ppid: 10236 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0xaa0/0x4cd0 kernel/sched/core.c:6428
schedule+0xd2/0x1f0 kernel/sched/core.c:6500
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1881
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
io_wq_exit_workers fs/io-wq.c:1266 [inline]
io_wq_put_and_exit+0x4d6/0xe40 fs/io-wq.c:1301
io_uring_clean_tctx fs/io_uring.c:11337 [inline]
io_uring_cancel_generic+0x538/0x5bc fs/io_uring.c:11407
io_uring_files_cancel include/linux/io_uring.h:44 [inline]
do_exit+0x4f9/0x2a00 kernel/exit.c:750
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7ffb542890e9
RSP: 002b:00007ffb553f5218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ffb5439bf68 RCX: 00007ffb542890e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ffb5439bf68
RBP: 00007ffb5439bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffb5439bf6c
R13: 00007ffc1a8efa3f R14: 00007ffb553f5300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bd867d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:502
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bd86450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:502
1 lock held by khungtaskd/29:
#0: ffffffff8bd87320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3292:
#0: ffff8880247dc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002cce2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2118
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.18.0-rc6-next-20220513-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+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc22/0xf90 kernel/hung_task.c:378
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:297
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2028 Comm: iou-wrk-2022 Not tainted 5.18.0-rc6-next-20220513-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:_raw_spin_lock_irq+0x0/0x50 kernel/locking/spinlock.c:169
Code: 18 45 31 c9 31 c9 ff 74 24 08 41 b8 01 00 00 00 31 d2 31 f6 e8 c1 86 e2 f7 48 89 ef 58 5d e9 27 fc e2 f7 0f 1f 80 00 00 00 00 <55> 48 89 fd 9c 58 fa f6 c4 02 75 30 bf 01 00 00 00 e8 aa 21 d6 f7
RSP: 0018:ffffc900163bf5a8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888023fbd800 RCX: 0000000000000000
RDX: ffff8880895fba80 RSI: ffffffff8724a8d2 RDI: ffff888023fbd8f8
RBP: ffffc900163bf720 R08: ffffffff8ac7b120 R09: 0000000000000000
R10: ffffffff8724a769 R11: 0000000000000000 R12: 0000000000000000
R10: ffffffff8724a769 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000002 R14: ffffc900163bf720 R15: ffff88801e9bf098
FS: 00007ffb553f5700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c014daa370 CR3: 000000008e901000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_lock_irq include/linux/spinlock.h:385 [inline]
snd_pcm_group_lock_irq sound/core/pcm_native.c:97 [inline]
snd_pcm_stream_lock_irq sound/core/pcm_native.c:136 [inline]
snd_pcm_delay+0x1ee/0x580 sound/core/pcm_native.c:3014
snd_pcm_kernel_ioctl+0x18e/0x310 sound/core/pcm_native.c:3447
snd_pcm_oss_capture_position_fixup+0x170/0x200 sound/core/oss/pcm_oss.c:1217
snd_pcm_oss_read3+0x172/0x400 sound/core/oss/pcm_oss.c:1288
snd_pcm_oss_read2+0x300/0x3f0 sound/core/oss/pcm_oss.c:1503
snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1531 [inline]
snd_pcm_oss_read+0x489/0x7a0 sound/core/oss/pcm_oss.c:2788
loop_rw_iter+0x1be/0x540 fs/io_uring.c:3964
io_iter_do_read fs/io_uring.c:4145 [inline]
io_iter_do_read fs/io_uring.c:4140 [inline]
io_read+0xef3/0x1290 fs/io_uring.c:4262
io_issue_sqe+0x77c/0xa140 fs/io_uring.c:8101
io_wq_submit_work+0x22a/0x600 fs/io_uring.c:8290
io_worker_handle_work+0xb1c/0x1ab0 fs/io-wq.c:597
io_wqe_worker+0x637/0xdb0 fs/io-wq.c:644
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:297
----------------
Code disassembly (best guess):
0: 18 45 31 sbb %al,0x31(%rbp)
3: c9 leaveq
4: 31 c9 xor %ecx,%ecx
6: ff 74 24 08 pushq 0x8(%rsp)
a: 41 b8 01 00 00 00 mov $0x1,%r8d
10: 31 d2 xor %edx,%edx
12: 31 f6 xor %esi,%esi
14: e8 c1 86 e2 f7 callq 0xf7e286da
19: 48 89 ef mov %rbp,%rdi
1c: 58 pop %rax
1d: 5d pop %rbp
1e: e9 27 fc e2 f7 jmpq 0xf7e2fc4a
23: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
* 2a: 55 push %rbp <-- trapping instruction
2b: 48 89 fd mov %rdi,%rbp
2e: 9c pushfq
2f: 58 pop %rax
30: fa cli
31: f6 c4 02 test $0x2,%ah
34: 75 30 jne 0x66
36: bf 01 00 00 00 mov $0x1,%edi
3b: e8 aa 21 d6 f7 callq 0xf7d621ea