INFO: task syz-executor.3:21492 blocked for more than 143 seconds.
Not tainted 5.4.0-rc4+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D25752 21492 9688 0x00004006
Call Trace:
context_switch kernel/sched/core.c:3384 [inline]
__schedule+0x94f/0x1e70 kernel/sched/core.c:4069
schedule+0xd9/0x260 kernel/sched/core.c:4136
perf_event_free_task+0x50d/0x6d0 kernel/events/core.c:11699
copy_process+0x43e2/0x6860 kernel/fork.c:2278
_do_fork+0x146/0xfa0 kernel/fork.c:2366
__do_sys_clone kernel/fork.c:2521 [inline]
__se_sys_clone kernel/fork.c:2502 [inline]
__x64_sys_clone+0x18d/0x250 kernel/fork.c:2502
do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459f39
Code: 48 89 76 48 48 8d 44 24 08 48 89 46 38 48 89 6e 68 48 8b 1b 64 48 89 1c 25 f8 ff ff ff 48 8b 63 38 52 e8 aa bb fe ff 48 c7 04 <25> 03 10 00 00 00 00 00 00 5a c3 cc cc cc cc cc cc cc cc cc cc cc
RSP: 002b:00007f5f7522dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459f39
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000002102001ffc
RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5f7522e6d4
R13: 00000000004c05bf R14: 00000000004d2ab0 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1069:
#0: ffffffff88fab400 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5337
2 locks held by rsyslogd/9512:
#0: ffff8880986ead60 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
#1: ffffffff88fab400 (rcu_read_lock){....}, at: __might_fault+0xfb/0x1e0 mm/memory.c:4449
2 locks held by getty/9634:
#0: ffff8880a0856090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9635:
#0: ffff8880931bd090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f552e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9636:
#0: ffff8880a76fa090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f592e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9637:
#0: ffff888099639090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f512e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9638:
#0: ffff888097f32090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f5d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9639:
#0: ffff8880a39a2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f3d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9640:
#0: ffff88809003e090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f2d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1069 Comm: khungtaskd Not tainted 5.4.0-rc4+ #0
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+0x70/0xb2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x23b/0x28b 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:205 [inline]
watchdog+0x9d0/0xef0 kernel/hung_task.c:289
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60