INFO: task syz-executor.0:17551 blocked for more than 143 seconds.
Not tainted 5.1.0-rc3+ #49
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D29632 17551 7789 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2877 [inline]
__schedule+0x817/0x1cc0 kernel/sched/core.c:3518
schedule+0x92/0x180 kernel/sched/core.c:3562
schedule_timeout+0x8ca/0xfd0 kernel/time/timer.c:1779
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common kernel/sched/completion.c:115 [inline]
wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136
__do_sys_io_destroy fs/aio.c:1405 [inline]
__se_sys_io_destroy fs/aio.c:1383 [inline]
__x64_sys_io_destroy+0x373/0x420 fs/aio.c:1383
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4582b9
Code: 42 08 48 89 04 24 e8 c6 ee fc ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 07 1c 00 00 eb c5 cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 0f 86 9b 00 00 00 48 83 ec 28 48 89 6c 24 20 48 8d 6c
RSP: 002b:00007f5e8bb55c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000004582b9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5e8bb35000
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5e8bb566d4
R13: 00000000004bf3f1 R14: 00000000004d1148 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1042:
#0: 0000000040d9c90f (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5061
2 locks held by rsyslogd/7662:
#0: 00000000ee0d4b2f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
#1: 0000000006b908e3 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1168 [inline]
#1: 0000000006b908e3 (&rq->lock){-.-.}, at: __schedule+0x1fc/0x1cc0 kernel/sched/core.c:3456
2 locks held by getty/7752:
#0: 0000000004e1e664 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000003cc04cf0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7753:
#0: 00000000b40978e0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000075e75aa9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7754:
#0: 00000000a6c345ac (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000eb6330b2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7755:
#0: 000000000bf44bc9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000c2923ee9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7756:
#0: 00000000cd10348b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000868c9e35 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7757:
#0: 0000000073413a72 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000056b42dad (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7758:
#0: 00000000f20c6830 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000090ce820d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1042 Comm: khungtaskd Not tainted 5.1.0-rc3+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
watchdog+0x9b7/0xec0 kernel/hung_task.c:288
kthread+0x357/0x430 kernel/kthread.c:253
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1: