INFO: task syz-executor.2:15545 blocked for more than 143 seconds.
Not tainted 5.18.0-rc6-syzkaller-00007-g9be9ed2612b5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27528 pid:15545 ppid: 3647 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1860
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x373/0x530 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:10391 [inline]
io_uring_cancel_generic+0x538/0x5bc fs/io_uring.c:10461
io_uring_files_cancel include/linux/io_uring.h:18 [inline]
do_exit+0x4f9/0x2a00 kernel/exit.c:750
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x22df/0x24c0 kernel/signal.c:2864
arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:867
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+0x19/0x60 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2cc94890e9
RSP: 002b:00007f2cca66d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f2cc959bf68 RCX: 00007f2cc94890e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2cc959bf68
RBP: 00007f2cc959bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2cc959bf6c
R13: 00007f2cc9acfb1f R14: 00007f2cca66d300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd820e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
2 locks held by getty/3279:
#0: ffff88807f170098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002ce62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc6-syzkaller-00007-g9be9ed2612b5 #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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15563 Comm: iou-wrk-15545 Not tainted 5.18.0-rc6-syzkaller-00007-g9be9ed2612b5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xa/0x56c0 kernel/locking/lockdep.c:4887
Code: 55 b9 8d e8 08 88 67 00 e9 46 ff ff ff 48 c7 c7 e8 55 b9 8d e8 f7 87 67 00 e9 58 fe ff ff 66 90 41 57 41 89 f2 45 89 cf 41 56 <41> 89 ce 41 55 41 54 55 89 d5 48 ba 00 00 00 00 00 fc ff df 53 48
RSP: 0018:ffffc9001535f6d8 EFLAGS: 00000006
RAX: 0000000000000001 RBX: 1ffff92002a6bee4 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9068ab18
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff9068ab18 R15: 0000000000000000
FS: 00007f2cca66d700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00703eff0 CR3: 000000007ace3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5641 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
dev_read+0x96/0x560 fs/dlm/plock.c:390
loop_rw_iter+0x1be/0x540 fs/io_uring.c:3563
io_iter_do_read fs/io_uring.c:3744 [inline]
io_iter_do_read fs/io_uring.c:3739 [inline]
io_read+0xefa/0x12b0 fs/io_uring.c:3861
io_issue_sqe+0x768/0x8a00 fs/io_uring.c:7143
io_wq_submit_work+0x22a/0x620 fs/io_uring.c:7318
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:298
----------------
Code disassembly (best guess), 3 bytes skipped:
0: e8 08 88 67 00 callq 0x67880d
5: e9 46 ff ff ff jmpq 0xffffff50
a: 48 c7 c7 e8 55 b9 8d mov $0xffffffff8db955e8,%rdi
11: e8 f7 87 67 00 callq 0x67880d
16: e9 58 fe ff ff jmpq 0xfffffe73
1b: 66 90 xchg %ax,%ax
1d: 41 57 push %r15
1f: 41 89 f2 mov %esi,%r10d
22: 45 89 cf mov %r9d,%r15d
25: 41 56 push %r14
* 27: 41 89 ce mov %ecx,%r14d <-- trapping instruction
2a: 41 55 push %r13
2c: 41 54 push %r12
2e: 55 push %rbp
2f: 89 d5 mov %edx,%ebp
31: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
38: fc ff df
3b: 53 push %rbx
3c: 48 rex.W