INFO: task syz-executor.0:13916 blocked for more than 143 seconds.
Not tainted 5.0.0-next-20190306 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27592 13916 7861 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
request_wait_answer+0x42f/0x7c0 fs/fuse/dev.c:554
__fuse_request_send+0x12b/0x1d0 fs/fuse/dev.c:574
fuse_request_send+0x60/0xa0 fs/fuse/dev.c:587
fuse_simple_request+0x2f6/0x740 fs/fuse/dev.c:645
fuse_do_getattr+0x24b/0xc80 fs/fuse/dir.c:895
fuse_perm_getattr+0x3d/0x60 fs/fuse/dir.c:1078
fuse_permission+0x3d5/0x530 fs/fuse/dir.c:1115
do_inode_permission fs/namei.c:384 [inline]
inode_permission+0x36d/0x570 fs/namei.c:449
may_lookup fs/namei.c:1700 [inline]
link_path_walk.part.0+0x9d6/0x1340 fs/namei.c:2082
link_path_walk fs/namei.c:2070 [inline]
path_openat+0x202/0x46e0 fs/namei.c:3532
do_filp_open+0x1a1/0x280 fs/namei.c:3563
do_sys_open+0x3fe/0x5d0 fs/open.c:1063
__do_sys_openat fs/open.c:1090 [inline]
__se_sys_openat fs/open.c:1084 [inline]
__x64_sys_openat+0x9d/0x100 fs/open.c:1084
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458079
Code: 0f b6 4a 28 48 8b 52 30 c6 81 c9 02 00 00 01 48 8b 4b 10 4c 8b 53 08 48 8b 1b 49 39 ca 0f 87 23 01 00 00 48 89 74 24 38 48 89 <7c> 24 30 4c 89 44 24 28 44 88 4c 24 27 48 89 54 24 50 48 89 44 24
RSP: 002b:00007ff0ea995c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458079
RDX: 0000000000000002 RSI: 0000000020000500 RDI: ffffffffffffff9c
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff0ea9966d4
R13: 00000000004c40f2 R14: 00000000004d75b8 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1043:
#0: 0000000049f20fcd (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5052
1 lock held by rsyslogd/7736:
#0: 0000000096321a44 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/7826:
#0: 00000000555675ef (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000da723e8f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7827:
#0: 0000000044b3c8e3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000004e06cd7f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7828:
#0: 0000000077438070 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000018e409d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7829:
#0: 000000002fe527b8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000df50a56d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7830:
#0: 00000000af18ce1e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000084ace57 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7831:
#0: 000000003843b5dc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000000107013d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/7832:
#0: 00000000b61f5026 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000c7359266 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
3 locks held by kworker/u4:7/13169:
#0: 0000000045d4e134 (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:10011 [inline]
#0: 0000000045d4e134 (&rq->lock){-.-.}, at: pick_next_task_fair+0x1214/0x19a0 kernel/sched/fair.c:7062
#1: 0000000049f20fcd (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:6059
#2: 000000002501e4bb (&base->lock){-.-.}, at: lock_timer_base+0x56/0x1b0 kernel/time/timer.c:937
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1043 Comm: khungtaskd Not tainted 5.0.0-next-20190306 #4
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.0.0-next-20190306 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_serial_out+0x73/0x90 drivers/tty/serial/8250/8250_port.c:456
Code: 00 49 8d 7c 24 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 19 41 03 5c 24 38 44 89 e8 89 da ee <5b> 41 5c 41 5d 5d c3 e8 d1 b2 2e fe eb c0 e8 2a b3 2e fe eb e0 0f
RSP: 0018:ffff8880ae807510 EFLAGS: 00000002
RAX: 000000000000005b RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff8379e2e6 RDI: ffffffff8afd5298
RBP: ffff8880ae807528 R08: ffffffff8887e080 R09: ffffed1015d00ea0
R10: ffffed1015d00e9f R11: 0000000000000003 R12: ffffffff8afd5260
R13: 000000000000005b R14: ffffffff8afd5260 R15: 000000000000005b
FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000932e0000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
serial_port_out include/linux/serial_core.h:278 [inline]
serial8250_console_putchar+0x4e/0x60 drivers/tty/serial/8250/8250_port.c:3200
uart_console_write+0x57/0x120 drivers/tty/serial/serial_core.c:1917
serial8250_console_write+0x62b/0x9c0 drivers/tty/serial/8250/8250_port.c:3263
univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:586
call_console_drivers kernel/printk/printk.c:1774 [inline]
console_unlock+0xb1e/0xeb0 kernel/printk/printk.c:2452
vprintk_emit+0x280/0x6d0 kernel/printk/printk.c:1975
vprintk_default+0x28/0x30 kernel/printk/printk.c:2002
vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
printk+0xba/0xed kernel/printk/printk.c:2035
dev_queue_xmit_nit.cold+0x3f/0x4b net/core/dev.c:2049
xmit_one net/core/dev.c:3274 [inline]
dev_hard_start_xmit+0xbb/0x980 net/core/dev.c:3294
__dev_queue_xmit+0x271d/0x3060 net/core/dev.c:3864
dev_queue_xmit+0x18/0x20 net/core/dev.c:3897
hsr_xmit net/hsr/hsr_forward.c:237 [inline]
hsr_forward_do net/hsr/hsr_forward.c:295 [inline]
hsr_forward_skb+0xcfa/0x1bd0 net/hsr/hsr_forward.c:373
send_hsr_supervision_frame+0x8c2/0xf20 net/hsr/hsr_device.c:320
hsr_announce+0x12f/0x430 net/hsr/hsr_device.c:349
call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
expire_timers kernel/time/timer.c:1362 [inline]
__run_timers kernel/time/timer.c:1681 [inline]
__run_timers kernel/time/timer.c:1649 [inline]
run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
__do_softirq+0x266/0x95a kernel/softirq.c:293
invoke_softirq kernel/softirq.c:374 [inline]
irq_exit+0x180/0x1d0 kernel/softirq.c:414
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
RIP: 0010:native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:58
Code: ff ff ff 48 89 c7 48 89 45 d8 e8 f9 32 99 fa 48 8b 45 d8 e9 ce fe ff ff 48 89 df e8 e8 32 99 fa eb 82 90 90 90 90 90 90 fb f4 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f4 c3 90 90 90 90 90 90
RSP: 0018:ffffffff88807d08 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11252b9 RBX: ffffffff8887e080 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff8887e8fc
RBP: ffffffff88807d38 R08: ffffffff8887e080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff889295b8 R14: 0000000000000000 R15: 0000000000000000
arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:567
default_idle_call+0x36/0x90 kernel/sched/idle.c:93
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
do_idle+0x386/0x570 kernel/sched/idle.c:262
cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:353
rest_init+0x245/0x37b init/main.c:450
arch_call_rest_init+0xe/0x1b
start_kernel+0x816/0x84f init/main.c:747
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470
x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243