syzbot


INFO: task hung in sit_exit_batch_net

Status: auto-obsoleted due to no activity on 2024/09/25 01:30
Reported-by: syzbot+fa7d54d0a43030567c75@syzkaller.appspotmail.com
First crash: 102d, last: 102d
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in sit_exit_batch_net net 2 1848d 1857d 0/28 closed as invalid on 2019/10/23 07:54
upstream INFO: task hung in sit_exit_batch_net (3) net 1 822d 822d 0/28 auto-closed as invalid on 2022/09/26 13:51
upstream INFO: task hung in sit_exit_batch_net (2) net 1 1398d 1398d 0/28 auto-closed as invalid on 2021/02/27 16:17
linux-4.19 INFO: task hung in sit_exit_batch_net 2 998d 1034d 0/1 auto-closed as invalid on 2022/05/03 11:37
upstream INFO: task hung in sit_exit_batch_net (4) net 2 675d 682d 0/28 auto-obsoleted due to no activity on 2023/02/12 17:49

Sample crash report:
INFO: task kworker/u4:2:41 blocked for more than 143 seconds.
      Not tainted 6.1.94-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:2    state:D stack:22336 pid:41    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 sit_exit_batch_net+0xc0/0x480 net/ipv6/sit.c:1883
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x763/0xb60 net/core/net_namespace.c:604
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/17 01:30 linux-6.1.y eb44d83053d6 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in sit_exit_batch_net
* Struck through repros no longer work on HEAD.