INFO: task kworker/u8:5:64 blocked for more than 143 seconds.
Not tainted 6.11.0-rc2-syzkaller-00011-geb5e56d14912 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:5 state:D stack:22144 pid:64 tgid:64 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
__flush_workqueue+0x39e/0x1200 kernel/workqueue.c:3969
peer_remove_after_dead+0xb8/0x2d0 drivers/net/wireguard/peer.c:116
wg_peer_remove_all+0x27c/0x3a0 drivers/net/wireguard/peer.c:183
wg_destruct+0x1c3/0x3d0 drivers/net/wireguard/device.c:254
netdev_run_todo+0x760/0x12d0 net/core/dev.c:10754
default_device_exit_batch+0x860/0xae0 net/core/dev.c:11890
ops_exit_list+0x128/0x180 net/core/net_namespace.c:178
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640
process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by kthreadd/2:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x4379/0x8de0 kernel/fork.c:2470
1 lock held by khungtaskd/30:
#0: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb5ca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
4 locks held by kworker/u8:5/64:
#0: ffff8880166e3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc900015f7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffffffff8fa0b790 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594
#3: ffff88801f635428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x151/0x3d0 drivers/net/wireguard/device.c:249
2 locks held by kworker/u8:8/2541:
#0: ffff888015889148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc90008fe7d80 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
1 lock held by dhcpcd/4885:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x4379/0x8de0 kernel/fork.c:2470
2 locks held by getty/4974:
#0: ffff88802b89a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by kworker/0:2H/13308:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x54e/0x2bb0 kernel/exit.c:839
1 lock held by syz-executor/19561:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x54e/0x2bb0 kernel/exit.c:839
5 locks held by kworker/0:10/23505:
6 locks held by syz-executor/24635:
1 lock held by syz.2.6483/24678:
1 lock held by syz.3.6492/24710:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x54e/0x2bb0 kernel/exit.c:839
1 lock held by syz.3.6492/24711:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x54e/0x2bb0 kernel/exit.c:839
3 locks held by syz-executor/24712:
#0: ffffffff8fa0b790 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffff888061546f18 (k-sk_lock-AF_RXRPC){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#1: ffff888061546f18 (k-sk_lock-AF_RXRPC){+.+.}-{0:0}, at: rxrpc_bind+0xa8/0x5a0 net/rxrpc/af_rxrpc.c:145
#2: ffff888069a281e8 (&rxnet->local_mutex){+.+.}-{3:3}, at: rxrpc_lookup_local+0xcb/0x1220 net/rxrpc/local_object.c:262
3 locks held by syz-executor/24716:
#0: ffffffff8fa0b790 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:504
#1: ffff888061545958 (k-sk_lock-AF_RXRPC){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#1: ffff888061545958 (k-sk_lock-AF_RXRPC){+.+.}-{0:0}, at: rxrpc_bind+0xa8/0x5a0 net/rxrpc/af_rxrpc.c:145
#2: ffff88806ca341e8 (&rxnet->local_mutex){+.+.}-{3:3}, at: rxrpc_lookup_local+0xcb/0x1220 net/rxrpc/local_object.c:262
1 lock held by syz.0.6494/24717:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x54e/0x2bb0 kernel/exit.c:839
1 lock held by syz.0.6494/24719:
#0: ffffffff8de05810 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x54e/0x2bb0 kernel/exit.c:839
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc2-syzkaller-00011-geb5e56d14912 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf4e/0x1280 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 24678 Comm: syz.2.6483 Not tainted 6.11.0-rc2-syzkaller-00011-geb5e56d14912 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:write_comp_data+0x0/0x90 kernel/kcov.c:230
Code: 48 8b 05 83 64 79 7e 48 8b 80 10 16 00 00 c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <49> 89 d2 49 89 f8 49 89 f1 65 48 8b 15 4f 64 79 7e 65 8b 05 50 64
RSP: 0018:ffffc900033c7da0 EFLAGS: 00000202
RAX: 0000000000000002 RBX: 0000000000000002 RCX: ffffffff818b153d
RDX: 000000007fc00000 RSI: 0000000000050000 RDI: 0000000000000005
RBP: ffffffff8b51dcc0 R08: 0000000000000005 R09: 0000000000030000
R10: 000000007fc00000 R11: 0000000000000000 R12: 000000007fc00000
R13: 0000000000000005 R14: 0000000000000006 R15: 000000007fff0000
FS: 00007f7b8c71c6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 0000000064e08000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:341
__seccomp_filter+0x37d/0xf40 kernel/seccomp.c:1239
__secure_computing+0x26c/0x3f0 kernel/seccomp.c:1367
syscall_trace_enter+0x8b/0x240 kernel/entry/common.c:52
syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
do_syscall_64+0x1ee/0x250 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b8b9779f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7b8c71c0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f7b8bb06060 RCX: 00007f7b8b9779f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7b8bb06060
RBP: 00007f7b8bb06058 R08: 00007f7b8c71c6c0 R09: 00007f7b8c71c6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7b8bb06064
R13: 000000000000006e R14: 00007fffb015e940 R15: 00007fffb015ea28