INFO: task syz-executor.0:16455 blocked for more than 143 seconds.
Not tainted 6.0.0-rc6-syzkaller-00321-g105a36f3694e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25368 pid:16455 ppid: 13578 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x91f/0xdf0 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common+0xe4f/0x26e0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
io_uring_del_tctx_node+0xe7/0x2a2 io_uring/tctx.c:175
io_uring_clean_tctx+0x106/0x1d0 io_uring/tctx.c:191
io_uring_cancel_generic+0x5f1/0x66f io_uring/io_uring.c:2855
io_uring_files_cancel include/linux/io_uring.h:44 [inline]
do_exit+0x13d/0x20a0 kernel/exit.c:750
do_group_exit+0x23b/0x2f0 kernel/exit.c:925
get_signal+0x172f/0x1780 kernel/signal.c:2857
arch_do_signal_or_restart+0x7b/0x730 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x74/0x150 kernel/entry/common.c:166
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:294
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f56ba88a669
RSP: 002b:00007f56b97bc168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000616 RBX: 00007f56ba9ac120 RCX: 00007f56ba88a669
RDX: 0000000000000000 RSI: 0000000000000616 RDI: 0000000000000003
RBP: 00007f56ba8e5560 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc14e258df R14: 00007f56b97bc300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cb233f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cb23bf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/29:
#0: ffffffff8cb23220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3281:
#0: ffff88814ae4f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
3 locks held by kworker/0:12/4356:
#0: ffff888012064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc900161b7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
#2: ffff888059b08240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2db/0x57c0 drivers/net/netdevsim/fib.c:1489
1 lock held by syz-executor.0/16446:
1 lock held by syz-executor.0/16455:
#0: ffff888022c820a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0xe7/0x2a2 io_uring/tctx.c:175
1 lock held by syz-executor.0/16532:
1 lock held by syz-executor.2/16746:
1 lock held by syz-executor.0/17119:
1 lock held by syz-executor.0/17121:
#0: ffff888021bd20a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0xe7/0x2a2 io_uring/tctx.c:175
1 lock held by syz-executor.2/17137:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller-00321-g105a36f3694e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
nmi_cpu_backtrace+0x425/0x450 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16532 Comm: syz-executor.0 Not tainted 6.0.0-rc6-syzkaller-00321-g105a36f3694e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:io_prep_async_work+0x26f/0x680 io_uring/io_uring.c:410
Code: 8b 44 24 08 80 08 10 4f 8d 24 76 4c 89 ed 48 c1 ed 03 42 80 7c 3d 00 00 74 08 4c 89 ef e8 a9 7e b1 fd 49 c1 e4 04 4d 8b 75 00 <83> e3 01 31 ff 89 de e8 45 96 5e fd 4d 85 f6 74 31 85 db 75 2d e8
RSP: 0018:ffffc900051cf9d0 EFLAGS: 00000206
RAX: ffffffff8428f789 RBX: 000000000004000c RCX: ffff888021690000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff1100442ea78 R08: ffffffff8428f775 R09: ffffed100fcd841f
R10: ffffed100fcd841f R11: 1ffff1100fcd841e R12: 00000000000005a0
R13: ffff8880221753c0 R14: ffff888076e91900 R15: dffffc0000000000
FS: 00007f684abb4700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561758776020 CR3: 000000002b685000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
io_prep_async_link io_uring/io_uring.c:435 [inline]
io_queue_iowq+0x128/0x3a0 io_uring/io_uring.c:448
io_queue_async+0x61d/0x860 io_uring/io_uring.c:1740
handle_tw_list io_uring/io_uring.c:984 [inline]
tctx_task_work+0x65b/0x9d0 io_uring/io_uring.c:1037
task_work_run+0x146/0x1c0 kernel/task_work.c:177
get_signal+0x15d9/0x1780 kernel/signal.c:2634
arch_do_signal_or_restart+0x7b/0x730 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x74/0x150 kernel/entry/common.c:166
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:294
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6849a8a669
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f684abb4168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000073cb RBX: 00007f6849babf80 RCX: 00007f6849a8a669
RDX: 000000000000b65c RSI: 00000000000073cb RDI: 0000000000000003
RBP: 00007f6849ae5560 R08: 00000000200000c0 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc8073f15f R14: 00007f684abb4300 R15: 0000000000022000