INFO: task syz-executor.1:12863 blocked for more than 143 seconds.
Not tainted 5.13.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27872 pid:12863 ppid: 11387 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4339 [inline]
__schedule+0x916/0x23e0 kernel/sched/core.c:5147
schedule+0xcf/0x270 kernel/sched/core.c:5226
rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write_common kernel/locking/rwsem.c:1258 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1407
unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1949
bcm_release+0x94/0x780 net/can/bcm.c:1474
__sock_release+0xcd/0x280 net/socket.c:599
sock_close+0x18/0x20 net/socket.c:1258
__fput+0x288/0x920 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xbfc/0x2a60 kernel/exit.c:826
do_group_exit+0x125/0x310 kernel/exit.c:923
get_signal+0x47f/0x2150 kernel/signal.c:2835
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x171/0x280 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007f5fee4c4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: 0000000000000004 RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffe478ff7cf R14: 00007f5fee4c4300 R15: 0000000000022000
Showing all locks held in the system:
4 locks held by kworker/u4:1/25:
#0: ffff88801267a138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801267a138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff88801267a138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff88801267a138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff88801267a138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff88801267a138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247
#1: ffffc90000e17da8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251
#2: ffffffff8d690c10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557
#3: ffffffff8bf7f930 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x430 kernel/rcu/tree.c:4018
1 lock held by khungtaskd/1607:
#0: ffffffff8bf76820 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333
1 lock held by systemd-journal/4838:
3 locks held by kworker/u4:12/11854:
2 locks held by syz-executor.1/12863:
#0: ffff8880783f8210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline]
#0: ffff8880783f8210 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:598
#1: ffffffff8d690c10 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1949
1 lock held by syz-executor.4/13570:
#0: ffffffff8d690c10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:470
1 lock held by syz-executor.0/13573:
#0: ffffffff8d690c10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:470
1 lock held by syz-executor.1/13574:
#0: ffffffff8d690c10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:470
1 lock held by syz-executor.3/13610:
#0: ffffffff8d690c10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:470
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1607 Comm: khungtaskd Not tainted 5.13.0-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:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xd48/0xfb0 kernel/hung_task.c:294
kthread+0x3b1/0x4a0 kernel/kthread.c:313
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4838 Comm: systemd-journal Not tainted 5.13.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__unwind_start+0x3f/0x800 arch/x86/kernel/unwind_orc.c:628
Code: 00 00 55 48 89 f5 31 f6 53 48 89 cb 48 83 ec 18 e8 d6 6c 85 00 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 5b 06 00 00 80 3d 98 95 da 09 00 49 89 6f 28 0f 84 18 02 00
RSP: 0018:ffffc90001617a58 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc90001617b30 RCX: 0000000000000000
RDX: 1ffff920002c2f5a RSI: 0000000000000000 RDI: ffffc90001617b08
RBP: ffff888019e72040 R08: 0000000000000001 R09: ffffc90001617aa8
R10: fffff520002c2f60 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90001617ad0 R14: ffff888019e72040 R15: ffffc90001617aa8
FS: 00007fe28887a8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2844c6000 CR3: 0000000019f94000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:428 [inline]
__kasan_slab_alloc+0x81/0xa0 mm/kasan/common.c:461
kasan_slab_alloc include/linux/kasan.h:236 [inline]
slab_post_alloc_hook mm/slab.h:524 [inline]
slab_alloc mm/slab.c:3323 [inline]
kmem_cache_alloc+0x275/0x530 mm/slab.c:3507
prepare_creds+0x3b/0x730 kernel/cred.c:258
access_override_creds fs/open.c:355 [inline]
do_faccessat+0x3f4/0x850 fs/open.c:419
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe287b359c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffef7ba6de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffef7ba9d00 RCX: 00007fe287b359c7
RDX: 00007fe2885a6a00 RSI: 0000000000000000 RDI: 00005638778959a3
RBP: 00007ffef7ba6e20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffef7ba9d00 R15: 00007ffef7ba7310