INFO: task hung in ip6_mroute

INFO: task hung in ip6_mroute_setsockopt

Status: auto-obsoleted due to no activity on 2024/10/03 10:41
Reported-by: syzbot+f2d223f626f02a267fb1@syzkaller.appspotmail.com
First crash: 422d, last: 422d

▶ ▼ Similar bugs (2)

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in ip6_mroute_setsockopt (2) net	1				3	242d	326d	0/29	auto-obsoleted due to no activity on 2025/03/22 11:08
upstream	INFO: task hung in ip6_mroute_setsockopt net	1				7	428d	454d	0/29	auto-obsoleted due to no activity on 2024/09/18 07:06

Sample crash report:

INFO: task syz.2.417:4970 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:syz.2.417       state:D stack:24512 pid:4970  ppid:3549   flags:0x00004004
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
 ip6_mroute_setsockopt+0xcb8/0x11d0 net/ipv6/ip6mr.c:1697

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/06/25 10:40	linux-6.1.y	eb44d83053d6	04bd2a30	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan	INFO: task hung in ip6_mroute_setsockopt

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