INFO: task syz-executor.3:28164 blocked for more than 143 seconds.
Not tainted 5.7.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D25848 28164 7531 0x80004006
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
rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199
lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
__sock_release+0x280/0x280 net/socket.c:605
__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
unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
__sock_release+0x280/0x280 net/socket.c:605
raw_release+0x53/0x730 net/can/raw.c:354
fcntl_setlk+0xcc0/0xcc0 fs/locks.c:2542
__sock_release+0x280/0x280 net/socket.c:605
__sock_release+0xcd/0x280 net/socket.c:605
sock_close+0x18/0x20 net/socket.c:1283
__fput+0x33e/0x880 fs/file_table.c:280
task_work_run+0xf4/0x1b0 kernel/task_work.c:123
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xb34/0x2dd0 kernel/exit.c:796
find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458
mm_update_next_owner+0x7a0/0x7a0 kernel/exit.c:375
lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
do_group_exit+0x125/0x340 kernel/exit.c:894
get_signal+0x47b/0x24e0 kernel/signal.c:2739
find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458
do_signal+0x81/0x2240 arch/x86/kernel/signal.c:784
lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
rcu_read_lock_any_held.part.0+0x50/0x50 arch/x86/include/asm/paravirt.h:754
get_sigframe.isra.0+0x730/0x730 arch/x86/kernel/signal.c:268
rcu_read_unlock_sched include/linux/rcupdate.h:732 [inline]
__fd_install+0x1e6/0x600 fs/file.c:613
__sys_socket+0x16d/0x200 net/socket.c:438
move_addr_to_kernel+0x70/0x70 net/socket.c:195
exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:161
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305
entry_SYSCALL_64_after_hwframe+0x49/0xb3
INFO: task syz-executor.0:28271 blocked for more than 143 seconds.
Not tainted 5.7.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D26144 28271 7180 0x80004006
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
rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199
lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934
unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
lock_release+0x800/0x800 kernel/locking/lockdep.c:4689
__sock_release+0x280/0x280 net/socket.c:605
__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
unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
__sock_release+0x280/0x280 net/socket.c:605
raw_release+0x53/0x730 net/can/raw.c:354
fcntl_setlk+0xcc0/0xcc0 fs/locks.c:2542
__sock_release+0x280/0x280 net/socket.c:605
__sock_release+0xcd/0x280 net/socket.c:605
sock_close+0x18/0x20 net/socket.c:1283
__fput+0x33e/0x880 fs/file_table.c:280
task_work_run+0xf4/0x1b0 kernel/task_work.c:123
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xb34/0x2dd0 kernel/exit.c:796
find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458
mm_update_next_owner+0x7a0/0x7a0 kernel/exit.c:375
lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
do_group_exit+0x125/0x340 kernel/exit.c:894
get_signal+0x47b/0x24e0 kernel/signal.c:2739
find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458
do_signal+0x81/0x2240 arch/x86/kernel/signal.c:784
lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579
rcu_read_lock_any_held.part.0+0x50/0x50 arch/x86/include/asm/paravirt.h:754
get_sigframe.isra.0+0x730/0x730 arch/x86/kernel/signal.c:268
rcu_read_unlock_sched include/linux/rcupdate.h:732 [inline]
__fd_install+0x1e6/0x600 fs/file.c:613
__sys_socket+0x16d/0x200 net/socket.c:438
move_addr_to_kernel+0x70/0x70 net/socket.c:195
exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:161
prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305
entry_SYSCALL_64_after_hwframe+0x49/0xb3
Showing all locks held in the system:
3 locks held by kworker/u4:0/7:
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239
#1: ffffc90000cdfdc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243
#2: ffffffff8a576f30 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50 net/core/net_namespace.c:565
1 lock held by khungtaskd/1143:
#0: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754
1 lock held by in:imklog/7069:
#0: ffff8880999d4930 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826
2 locks held by syz-executor.3/28164:
#0: ffff888087027210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline]
#0: ffff888087027210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:604
#1: ffffffff8a576f30 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
2 locks held by syz-executor.0/28271:
#0: ffff88804d6df210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline]
#0: ffff88804d6df210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:604
#1: ffffffff8a576f30 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1143 Comm: khungtaskd Not tainted 5.7.0-rc5-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: 4244 Comm: systemd-journal Not tainted 5.7.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0033:0x7fe3f038f510
Code: 8d 0d 44 b5 0e 00 48 8d 35 94 75 0e 00 48 8d 3d ee b0 0e 00 ba 62 0c 00 00 e8 8c b4 ff ff 48 89 fb e9 ee fd ff ff 0f 1f 40 00 <48> 8b 05 e1 d9 31 00 48 8b 00 48 85 c0 75 79 48 85 ff 74 7c 48 8b
RSP: 002b:00007ffe43759058 EFLAGS: 00000246
RAX: 000000000000000d RBX: 0000563c80dd0df0 RCX: fffffffffffffe00
RDX: 00000000000001a0 RSI: 00000000ffffffff RDI: 0000563c80dd0630
RBP: 0000000000000000 R08: 00000000000001e0 R09: 00000000ffffffff
R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000fffffffe R14: 00007ffe43759350 R15: 0000563c80dd0df0
FS: 00007fe3f11338c0 GS: 0000000000000000