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* [syzbot] [wireguard?] INFO: task hung in wg_destruct
@ 2024-05-29  1:04 syzbot
  0 siblings, 0 replies; only message in thread
From: syzbot @ 2024-05-29  1:04 UTC (permalink / raw)
  To: Jason, davem, edumazet, kuba, linux-kernel, netdev, pabeni,
	syzkaller-bugs, wireguard


syzbot found the following issue on:

HEAD commit:    e0cce98fe279 Merge tag 'tpmdd-next-6.10-rc2' of git://git...
git tree:       upstream
console output:
kernel config:
dashboard link:
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image:
kernel image:

IMPORTANT: if you fix the issue, please add the following tag to the commit:

INFO: task kworker/u8:2:35 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2    state:D stack:14456 pid:35    tgid:35    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 wg_destruct+0x25/0x2e0 drivers/net/wireguard/device.c:246
 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10692
 default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11760
 ops_exit_list net/core/net_namespace.c:178 [inline]
 cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task kworker/u8:12:8583 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:12   state:D stack:21976 pid:8583  tgid:8583  ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 kernel/sched/core.c:6745

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