INFO: task syz-executor.5:5558 blocked for more than 143 seconds.
Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D27688 5558 7642 0x00000004
Call Trace:
context_switch kernel/sched/core.c:3367 [inline]
__schedule+0x937/0x1ff0 kernel/sched/core.c:4083
rwsem_down_write_slowpath+0x90a/0xf90 kernel/locking/rwsem.c:1216
__sched_text_start+0x8/0x8
schedule+0xd0/0x2a0 kernel/sched/core.c:4158
rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235
pcpu_alloc+0xfed/0x13b0 mm/percpu.c:1703
rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199
lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729
lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
__down_write kernel/locking/rwsem.c:1389 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1532
atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1504 [inline]
atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline]
__down_write kernel/locking/rwsem.c:1387 [inline]
down_write+0xb2/0x150 kernel/locking/rwsem.c:1532
__down_write kernel/locking/rwsem.c:1389 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1532
__down_timeout+0x2d0/0x2d0
pcpu_alloc+0x128/0x13b0 mm/percpu.c:1740
register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729
raw_init+0x296/0x340 net/can/raw.c:339
raw_sock_no_ioctlcmd+0x10/0x10 net/can/raw.c:843
can_create+0x27c/0x500 net/can/af_can.c:168
__sock_create+0x3cb/0x730 net/socket.c:1433
sock_create net/socket.c:1484 [inline]
__sys_socket+0xef/0x200 net/socket.c:1526
move_addr_to_kernel+0x70/0x70 net/socket.c:195
__do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline]
__se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline]
__x64_sys_clock_gettime+0x165/0x240 kernel/time/posix-timers.c:1082
__ia32_sys_clock_settime+0x260/0x260 kernel/time/posix-timers.c:1410
trace_hardirqs_off_caller+0x55/0x230 kernel/trace/trace_preemptirq.c:73
__do_sys_socket net/socket.c:1535 [inline]
__se_sys_socket net/socket.c:1533 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1533
__trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline]
lockdep_hardirqs_on+0x463/0x620 kernel/locking/lockdep.c:3702
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.5:5614 blocked for more than 143 seconds.
Not tainted 5.7.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D29600 5614 7642 0x00000004
Call Trace:
context_switch kernel/sched/core.c:3367 [inline]
__schedule+0x937/0x1ff0 kernel/sched/core.c:4083
rwsem_down_write_slowpath+0x90a/0xf90 kernel/locking/rwsem.c:1216
__sched_text_start+0x8/0x8
schedule+0xd0/0x2a0 kernel/sched/core.c:4158
rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235
pcpu_alloc+0xfed/0x13b0 mm/percpu.c:1703
rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199
lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729
lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
__down_write kernel/locking/rwsem.c:1389 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1532
atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1504 [inline]
atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline]
__down_write kernel/locking/rwsem.c:1387 [inline]
down_write+0xb2/0x150 kernel/locking/rwsem.c:1532
__down_write kernel/locking/rwsem.c:1389 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1532
__down_timeout+0x2d0/0x2d0
pcpu_alloc+0x128/0x13b0 mm/percpu.c:1740
register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729
raw_init+0x296/0x340 net/can/raw.c:339
raw_sock_no_ioctlcmd+0x10/0x10 net/can/raw.c:843
can_create+0x27c/0x500 net/can/af_can.c:168
__sock_create+0x3cb/0x730 net/socket.c:1433
sock_create net/socket.c:1484 [inline]
__sys_socket+0xef/0x200 net/socket.c:1526
move_addr_to_kernel+0x70/0x70 net/socket.c:195
__do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline]
__se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline]
__x64_sys_clock_gettime+0x165/0x240 kernel/time/posix-timers.c:1082
__ia32_sys_clock_settime+0x260/0x260 kernel/time/posix-timers.c:1410
trace_hardirqs_off_caller+0x55/0x230 kernel/trace/trace_preemptirq.c:73
__do_sys_socket net/socket.c:1535 [inline]
__se_sys_socket net/socket.c:1533 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1533
__trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline]
lockdep_hardirqs_on+0x463/0x620 kernel/locking/lockdep.c:3702
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
Showing all locks held in the system:
1 lock held by khungtaskd/1140:
#0: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754
4 locks held by kworker/u4:5/2953:
1 lock held by in:imklog/6722:
1 lock held by syz-executor.5/5558:
#0: ffffffff8a57aaf0 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729
1 lock held by syz-executor.5/5614:
#0: ffffffff8a57aaf0 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1140 Comm: khungtaskd Not tainted 5.7.0-rc6-syzkaller #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+0x188/0x20d lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
lapic_can_unplug_cpu.cold+0x3b/0x3b
nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xa8c/0x1010 kernel/hung_task.c:289
reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243
kthread+0x388/0x470 kernel/kthread.c:268
kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2953 Comm: kworker/u4:5 Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__lock_acquire+0xe1e/0x4c50 kernel/locking/lockdep.c:4225
Code: 03 8f 0a e9 94 0b 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 0f 85 7b 31 00 00 49 81 3e 80 94 bd 8b <0f> 84 bd f2 ff ff 83 fe 01 0f 87 c5 f2 ff ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc900088178f8 EFLAGS: 00000006
RAX: dffffc0000000000 RBX: ffff88809e66c100 RCX: 0000000000000000
RDX: 1ffffffff130c7d3 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff8a899887 R11: fffffbfff1513310 R12: ffff88809e66c100
R13: 0000000000000000 R14: ffffffff89863e98 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7aec1e000 CR3: 0000000094220000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628
mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620
__trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline]
lockdep_hardirqs_on+0x463/0x620 kernel/locking/lockdep.c:3702
trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41
lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
spin_lock include/linux/spinlock.h:353 [inline]
nf_conntrack_lock+0x12/0x70 net/netfilter/nf_conntrack_core.c:91
lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
print_usage_bug+0x240/0x240 kernel/locking/lockdep.c:101
lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:353 [inline]
nf_conntrack_lock+0x12/0x70 net/netfilter/nf_conntrack_core.c:91
spin_lock include/linux/spinlock.h:353 [inline]
nf_conntrack_lock+0x12/0x70 net/netfilter/nf_conntrack_core.c:91
get_next_corpse net/netfilter/nf_conntrack_core.c:2139 [inline]
nf_ct_iterate_cleanup+0x227/0x4c0 net/netfilter/nf_conntrack_core.c:2184
nf_ct_port_nlattr_to_tuple+0x190/0x190 net/netfilter/nf_conntrack_core.c:1979
nf_conntrack_cleanup_net_list+0x81/0x250 net/netfilter/nf_conntrack_core.c:2371
print_tuple+0x540/0x540 net/netfilter/nf_conntrack_standalone.c:88
ops_exit_list.isra.0+0x103/0x150 net/core/net_namespace.c:189
cleanup_net+0x511/0xa50 net/core/net_namespace.c:603
unregister_pernet_device+0x70/0x70 net/core/net_namespace.c:1325
rcu_read_lock_any_held.part.0+0x50/0x50 arch/x86/include/asm/paravirt.h:754
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
_raw_spin_unlock_irq+0x1f/0x80 kernel/locking/spinlock.c:199
process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
pwq_dec_nr_in_flight+0x310/0x310 kernel/workqueue.c:1198
rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329
worker_thread+0x96/0xe20 kernel/workqueue.c:2414
process_one_work+0x16a0/0x16a0 kernel/workqueue.c:2273
kthread+0x388/0x470 kernel/kthread.c:268
kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351