INFO: task hung in fib6_rules_net_exit

Status: auto-obsoleted due to no activity on 2024/09/26 07:35
Reported-by: syzbot+babf1188689869af10ef@syzkaller.appspotmail.com
First crash: 798d, last: 783d
▶ ▼ Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in fib6_rules_net_exit 1 1 1664d 1664d 0/1 auto-closed as invalid on 2022/05/19 15:58
linux-4.19 INFO: task hung in fib6_rules_net_exit (2) 1 1 1470d 1470d 0/1 auto-obsoleted due to no activity on 2022/11/29 01:33
upstream INFO: task hung in fib6_rules_net_exit (2) net 1 7 2054d 2145d 0/29 auto-closed as invalid on 2021/03/25 09:49
upstream INFO: task hung in fib6_rules_net_exit net 1 1 3055d 3054d 0/29 closed as dup on 2018/03/31 16:17
android-49 INFO: task hung in fib6_rules_net_exit 1 1 2842d 2675d 0/3 auto-closed as invalid on 2019/04/28 09:31
upstream INFO: task hung in fib6_rules_net_exit (3) net 1 24 1754d 1789d 0/29 auto-closed as invalid on 2022/01/18 22:47
android-49 INFO: task hung in fib6_rules_net_exit (2) 1 1 2503d 2503d 0/3 auto-closed as invalid on 2020/01/31 05:34

Sample crash report:
INFO: task kworker/u4:0:9 blocked for more than 143 seconds.
      Not tainted 5.15.161-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0    state:D stack:19040 pid:    9 ppid:     2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 fib6_rules_net_exit+0xe/0x50 net/ipv6/fib6_rules.c:506
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:599
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/18 07:34 linux-5.15.y 4878aadf2d15 ce6011bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in fib6_rules_net_exit
2024/06/08 14:55 linux-5.15.y c61bd26ae81a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in fib6_rules_net_exit
2024/06/07 18:49 linux-5.15.y c61bd26ae81a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in fib6_rules_net_exit
2024/06/03 12:06 linux-5.15.y c61bd26ae81a 0aba2352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in fib6_rules_net_exit
* Struck through repros no longer work on HEAD.