kernel msg: ebtables bug: please report to author: EBT_ENTRY_OR_ENTRIES shouldn't be set in distinguisher
random: crng init done
INFO: task syz-executor2:6812 blocked for more than 120 seconds.
Not tainted 4.17.0-rc4+ #45
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2 D21736 6812 4538 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2848 [inline]
__schedule+0x801/0x1e30 kernel/sched/core.c:3490
schedule+0xef/0x430 kernel/sched/core.c:3549
blk_mq_freeze_queue_wait+0x1ce/0x460 block/blk-mq.c:152
blk_freeze_queue+0x4a/0x80 block/blk-mq.c:181
blk_mq_freeze_queue+0x15/0x20 block/blk-mq.c:190
loop_clr_fd+0x226/0xb80 drivers/block/loop.c:1047
lo_ioctl+0x642/0x2130 drivers/block/loop.c:1404
__blkdev_driver_ioctl block/ioctl.c:303 [inline]
blkdev_ioctl+0x9b6/0x2020 block/ioctl.c:601
block_ioctl+0xee/0x130 fs/block_dev.c:1877
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
__do_sys_ioctl fs/ioctl.c:708 [inline]
__se_sys_ioctl fs/ioctl.c:706 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455979
RSP: 002b:00007fa2f3d0ec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa2f3d0f6d4 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000002a9 R14: 00000000006f8078 R15: 0000000000000000
Showing all locks held in the system:
2 locks held by khungtaskd/893:
#0: 000000001a313f68 (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline]
#0: 000000001a313f68 (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 kernel/hung_task.c:249
#1: 0000000058e138c9 (tasklist_lock){.+.+}, at: debug_show_all_locks+0xde/0x34a kernel/locking/lockdep.c:4470
2 locks held by getty/4459:
#0: 00000000dbbc5f5f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000ac45e36c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4460:
#0: 0000000044ba86ae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000c9b1dbf3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4461:
#0: 000000006ae7a105 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 0000000070871c0b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4462:
#0: 000000004b388905 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 000000008036e3e2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4463:
#0: 0000000033069ca0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000972621ea (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4464:
#0: 00000000bd38770a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 0000000044d73738 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
2 locks held by getty/4465:
#0: 0000000067fef469 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365
#1: 00000000078af9c2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131
1 lock held by syz-executor0/4533:
#0: 00000000ec54feb5 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x2130 drivers/block/loop.c:1391
1 lock held by syz-executor2/6812:
#0: 00000000ec54feb5 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8d/0x2130 drivers/block/loop.c:1391
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 893 Comm: khungtaskd Not tainted 4.17.0-rc4+ #45
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+0x1b9/0x294 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x151/0x192 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:138 [inline]
check_hung_task kernel/hung_task.c:132 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline]
watchdog+0xc10/0xf60 kernel/hung_task.c:249
kthread+0x345/0x410 kernel/kthread.c:238
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.17.0-rc4+ #45
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x7f/0x5140 kernel/locking/lockdep.c:3290
RSP: 0018:ffff8801dae06f70 EFLAGS: 00000082
RAX: ffffed003b5c0e02 RBX: 1ffff1003b5c0e6b RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8801dae2c698
RBP: ffff8801dae07300 R08: 0000000000000001 R09: 0000000000000001
R10: ffffed003b5c58e1 R11: ffffffff88c75dc0 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801dae2c698
FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001afe31000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
rq_lock_irqsave kernel/sched/sched.h:1783 [inline]
update_blocked_averages+0x124/0x1750 kernel/sched/fair.c:7664
_nohz_idle_balance+0x59a/0x7e0 kernel/sched/fair.c:9657
nohz_idle_balance kernel/sched/fair.c:9710 [inline]
run_rebalance_domains+0x2be/0x4a0 kernel/sched/fair.c:9893
__do_softirq+0x2e0/0xaf5 kernel/softirq.c:285
invoke_softirq kernel/softirq.c:365 [inline]
irq_exit+0x1d1/0x200 kernel/softirq.c:405
scheduler_ipi+0x52b/0xa30 kernel/sched/core.c:1778
smp_reschedule_interrupt+0xed/0x660 arch/x86/kernel/smp.c:277
reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:887
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54
RSP: 0018:ffffffff88c07bc0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: dffffc0000000000 RBX: 1ffffffff1180f7b RCX: 0000000000000000
RDX: 1ffffffff11a3170 RSI: 0000000000000001 RDI: ffffffff88d18b80
RBP: ffffffff88c07bc0 R08: ffffed003b5c46c3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88c07c78 R14: ffffffff897bf3a0 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
default_idle+0xc2/0x440 arch/x86/kernel/process.c:354
arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:345
default_idle_call+0x6d/0x90 kernel/sched/idle.c:93
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
do_idle+0x395/0x560 kernel/sched/idle.c:262
cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:368
rest_init+0xe1/0xe4 init/main.c:441
start_kernel+0x906/0x92d init/main.c:737
x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:445
x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:426
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242
Code: f9 9b 88 48 c1 e8 03 48 89 84 24 98 00 00 00 48 01 d0 48 c7 84 24 b0 00 00 00 70 ac 5c 81 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 40 08 f2 f2 f2 f2 c7 40 0c 04 f2 f2 f2 c7 40 10 f2 f2 f2 f2
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.141 msecs