INFO: task syz-executor.2:21427 blocked for more than 143 seconds.
Not tainted 5.1.0-rc1-next-20190322 #9
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D28384 21427 7814 0x80000000
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
__synchronize_srcu+0x197/0x250 kernel/rcu/srcutree.c:925
synchronize_srcu+0x2dc/0x3e8 kernel/rcu/srcutree.c:1003
__mmu_notifier_release+0x219/0x3c0 mm/mmu_notifier.c:95
mmu_notifier_release include/linux/mmu_notifier.h:232 [inline]
exit_mmap+0x423/0x530 mm/mmap.c:3092
__mmput kernel/fork.c:1047 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1068
exit_mm kernel/exit.c:546 [inline]
do_exit+0x816/0x2fa0 kernel/exit.c:863
do_group_exit+0x135/0x370 kernel/exit.c:980
__do_sys_exit_group kernel/exit.c:991 [inline]
__se_sys_exit_group kernel/exit.c:989 [inline]
__x64_sys_exit_group+0x44/0x50 kernel/exit.c:989
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458209
Code: Bad RIP value.
RSP: 002b:00007ffd87c78558 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 0000000000458209
RDX: 0000000000411f01 RSI: 0000000000a54ef0 RDI: 0000000000000000
RBP: 00000000004bd822 R08: 000000000000000c R09: 00007ffd87c78660
R10: 0000000001602940 R11: 0000000000000246 R12: 000000000073bfac
R13: 0000000000000001 R14: 0000000000000003 R15: 000000000073bfac
INFO: task syz-executor.4:21470 blocked for more than 143 seconds.
Not tainted 5.1.0-rc1-next-20190322 #9
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D28384 21470 7821 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
__synchronize_srcu+0x197/0x250 kernel/rcu/srcutree.c:925
synchronize_srcu_expedited kernel/rcu/srcutree.c:950 [inline]
synchronize_srcu+0x239/0x3e8 kernel/rcu/srcutree.c:1001
mmu_notifier_unregister+0x2cf/0x440 mm/mmu_notifier.c:372
kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:745 [inline]
kvm_put_kvm+0x553/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:770
kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2500
__fput+0x2e5/0x8d0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x14a/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411fc1
Code: 83 e0 fe 48 39 d0 0f 84 45 01 00 00 48 81 c4 b0 00 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 00 31 c0 4d 85 f6 41 b9 90 f0 <41> 00 0f 95 c0 41 b8 25 f1 41 00 b9 a1 00 00 00 89 44 24 08 48 8d
RSP: 002b:00007ffd8ae0e6c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000411fc1
RDX: 0000000000000000 RSI: 0000000000740d08 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000740d00 R09: 0000000000276d3e
R10: 00007ffd8ae0e5e0 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffd8ae0e700 R14: 0000000000000000 R15: 00007ffd8ae0e710
Showing all locks held in the system:
1 lock held by khungtaskd/1029:
#0: 000000006fb00bc2 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5061
1 lock held by rsyslogd/7682:
#0: 000000002edafa91 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/7772:
#0: 00000000c7152828 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000004316a7ca (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7773:
#0: 000000005959a9dd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000c83c760c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7774:
#0: 0000000006532aa8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000007b0faf4b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7775:
#0: 00000000c034f96f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000042c78069 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7776:
#0: 0000000006d982eb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000a7f0b8e7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7777:
#0: 0000000008381bae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000cd0a0d34 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7778:
#0: 000000002281a70c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000004e58b9dd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
3 locks held by kworker/1:0/3372:
1 lock held by kworker/u4:0/11540:
#0: 0000000012875d27 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1168 [inline]
#0: 0000000012875d27 (&rq->lock){-.-.}, at: __schedule+0x1fc/0x1cc0 kernel/sched/core.c:3456
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1029 Comm: khungtaskd Not tainted 5.1.0-rc1-next-20190322 #9
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: