INFO: task syz-executor.1:13607 blocked for more than 143 seconds.
Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25000 pid:13607 tgid:13607 ppid:5108 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1960/0x4a80 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
coredump_task_exit kernel/exit.c:437 [inline]
do_exit+0x576/0x2750 kernel/exit.c:823
do_group_exit+0x206/0x2c0 kernel/exit.c:1021
get_signal+0x1769/0x1840 kernel/signal.c:2904
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fb06167cae9
RSP: 002b:00007ffc516bc6f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000262c16 RCX: 00007fb06167cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb06179c05c
RBP: 0000000000000032 R08: 00007fb06179c05c R09: 00007fb06179c05c
R10: 00007ffc516bc830 R11: 0000000000000246 R12: 00007fb06179c05c
R13: 0000000000262c48 R14: 00007ffc516bc850 R15: 00007ffc516bc830
INFO: task syz-executor.1:13614 blocked for more than 143 seconds.
Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24648 pid:13614 tgid:13607 ppid:5108 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1960/0x4a80 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e5/0x6d0 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:414 [inline]
do_coredump+0xa11/0x2ab0 fs/coredump.c:571
get_signal+0x146a/0x1840 kernel/signal.c:2890
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fb06167cae9
RSP: 002b:00007fb0623060c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffe5 RBX: 00007fb06179c050 RCX: 00007fb06167cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fb0616c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000010000101 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb06179c050 R15: 00007ffc516bc618
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92d360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92d360 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92d360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
2 locks held by getty/4820:
#0: ffff888025f760a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfa9/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13781 Comm: syz-executor.2 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:preempt_latency_start kernel/sched/core.c:5819 [inline]
RIP: 0010:preempt_count_add+0x97/0x180 kernel/sched/core.c:5844
Code: b6 c0 3d f5 00 00 00 73 59 65 8b 05 0b b3 a2 7e 25 ff ff ff 7f 39 d8 75 43 4c 8b 74 24 18 4c 89 f7 e8 3d d6 0d 00 85 c0 74 0a <45> 31 f6 31 ff e8 2f d6 0d 00 65 48 8b 1d d7 b2 a2 7e 48 81 c3 a8
RSP: 0018:ffffc9000464fa40 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8b216201
RDX: 0000000000000000 RSI: ffffffff8bbd6160 RDI: ffffffff8b21301a
RBP: ffffc9000464faf0 R08: ffffffff8f00692f R09: 1ffffffff1e00d25
R10: dffffc0000000000 R11: fffffbfff1e00d26 R12: 0000000000000246
R13: 1ffff920008c9f4c R14: ffffffff8b21301a R15: dffffc0000000000
FS: 00007f38e209e6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557d29f89040 CR3: 00000000311ee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:109 [inline]
_raw_spin_lock_irqsave+0xba/0x120 kernel/locking/spinlock.c:162
__wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
io_cqring_wake io_uring/io_uring.h:248 [inline]
io_cq_unlock_post io_uring/io_uring.c:678 [inline]
__io_cqring_overflow_flush+0x488/0x600 io_uring/io_uring.c:728
io_cqring_do_overflow_flush io_uring/io_uring.c:736 [inline]
io_cqring_wait io_uring/io_uring.c:2648 [inline]
__do_sys_io_uring_enter io_uring/io_uring.c:3754 [inline]
__se_sys_io_uring_enter+0x1e65/0x2ae0 io_uring/io_uring.c:3643
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f38e127cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f38e209e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f38e139bf80 RCX: 00007f38e127cae9
RDX: 0000000000400000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f38e12c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f38e139bf80 R15: 00007fffa620a8e8