INFO: task hung in fib6_rules_net_exit

INFO: task hung in fib6_rules_net_exit_batch

Status: closed as invalid on 2023/09/07 14:58
Subsystems: net
[Documentation on labels]
First crash: 753d, last: 753d

▶ ▼ Similar bugs (3)

Kernel	Title	Count	Last	Reported	Patched	Status
linux-6.1	INFO: task hung in fib6_rules_net_exit_batch	2	393d	400d	0/3	auto-obsoleted due to no activity on 2024/09/12 02:11
upstream	INFO: task hung in fib6_rules_net_exit_batch (2) net	10	379d	403d	0/29	auto-obsoleted due to no activity on 2024/08/06 23:39
upstream	INFO: task hung in fib6_rules_net_exit_batch (3) net	8	148d	283d	0/29	auto-obsoleted due to no activity on 2025/05/05 09:06

Sample crash report:

INFO: task kworker/u4:4:56 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc5-syzkaller-00915-ge7c5433c5aaa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4    state:D stack:23320 pid:56    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 fib6_rules_net_exit_batch+0x15/0xe0 net/ipv6/fib6_rules.c:500

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/06/10 01:32	net-next	e7c5433c5aaa	7086cdb9	.config	console log	report			info		ci-upstream-net-kasan-gce	INFO: task hung in fib6_rules_net_exit_batch

* ~~Struck through~~ repros no longer work on HEAD.