INFO: task syz-executor.2:4336 blocked for more than 143 seconds.
Not tainted 5.18.0-rc3-syzkaller-00006-gb7f73403a3e9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24664 pid: 4336 ppid: 27390 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0x939/0xea0 kernel/sched/core.c:6388
schedule+0xeb/0x1b0 kernel/sched/core.c:6460
schedule_timeout+0xac/0x300 kernel/time/timer.c:1860
do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
io_wq_exit_workers fs/io-wq.c:1266 [inline]
io_wq_put_and_exit+0x5e8/0xcd0 fs/io-wq.c:1301
io_uring_clean_tctx+0x164/0x1d0 fs/io_uring.c:10378
io_uring_cancel_generic+0x2de/0x554 fs/io_uring.c:10448
io_uring_files_cancel include/linux/io_uring.h:18 [inline]
do_exit+0x141/0x1eb0 kernel/exit.c:750
do_group_exit+0x23b/0x2f0 kernel/exit.c:925
get_signal+0x172f/0x1780 kernel/signal.c:2864
arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:867
exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:166
exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7504c890e9
RSP: 002b:00007f7505ea3218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f7504d9bf68 RCX: 00007f7504c890e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7504d9bf68
RBP: 00007f7504d9bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7504d9bf6c
R13: 00007fffe52159bf R14: 00007f7505ea3300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8c91ae60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3272:
#0: ffff888024fe8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002e732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ad/0x1c90 drivers/tty/n_tty.c:2075
2 locks held by kworker/u4:2/3541:
2 locks held by iou-wrk-4336/4349:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc3-syzkaller-00006-gb7f73403a3e9 #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+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcf9/0xd40 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4349 Comm: iou-wrk-4336 Not tainted 5.18.0-rc3-syzkaller-00006-gb7f73403a3e9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__mutex_unlock_slowpath+0x321/0x7b0 kernel/locking/mutex.c:904
Code: fc 88 cb 03 00 49 89 dd 0f 85 eb fe ff ff 48 c7 c7 20 f2 6c 8a 48 c7 c6 80 f5 6c 8a 31 c0 e8 e6 6f 3a f7 0f 0b e9 cf fe ff ff <48> c7 c1 a0 d6 95 90 80 e1 07 80 c1 03 38 c1 0f 8c 41 fe ff ff 48
RSP: 0018:ffffc9000b9eee40 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffff888023db8000 RCX: ffffffff8a14e9d1
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffc9000bd23280
RBP: ffffc9000b9eef50 R08: dffffc0000000000 R09: fffff520017a4651
R10: fffff520017a4651 R11: 1ffff920017a4650 R12: 1ffff9200173dddc
R13: dffffc0000000000 R14: 1ffffffff212bad4 R15: ffffffff84938c9b
FS: 00007f7505ea3700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1dcba50000 CR3: 0000000025ac2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
n_tty_read+0x1a0b/0x1c90 drivers/tty/n_tty.c:2188
iterate_tty_read drivers/tty/tty_io.c:858 [inline]
tty_read+0x2be/0x5f0 drivers/tty/tty_io.c:933
call_read_iter include/linux/fs.h:2044 [inline]
io_iter_do_read fs/io_uring.c:3743 [inline]
io_read fs/io_uring.c:3859 [inline]
io_issue_sqe+0x26b8/0xf3c0 fs/io_uring.c:7130
io_wq_submit_work+0x480/0x540 fs/io_uring.c:7305
io_worker_handle_work+0x8e1/0xee0 fs/io-wq.c:597
io_wqe_worker+0x39c/0xe90 fs/io-wq.c:644
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: fc cld
1: 88 cb mov %cl,%bl
3: 03 00 add (%rax),%eax
5: 49 89 dd mov %rbx,%r13
8: 0f 85 eb fe ff ff jne 0xfffffef9
e: 48 c7 c7 20 f2 6c 8a mov $0xffffffff8a6cf220,%rdi
15: 48 c7 c6 80 f5 6c 8a mov $0xffffffff8a6cf580,%rsi
1c: 31 c0 xor %eax,%eax
1e: e8 e6 6f 3a f7 callq 0xf73a7009
23: 0f 0b ud2
25: e9 cf fe ff ff jmpq 0xfffffef9
* 2a: 48 c7 c1 a0 d6 95 90 mov $0xffffffff9095d6a0,%rcx <-- trapping instruction
31: 80 e1 07 and $0x7,%cl
34: 80 c1 03 add $0x3,%cl
37: 38 c1 cmp %al,%cl
39: 0f 8c 41 fe ff ff jl 0xfffffe80
3f: 48 rex.W