INFO: task hung in addrconf_del_ifaddr

Status: auto-obsoleted due to no activity on 2024/09/25 13:16
Reported-by: syzbot+d50e25632993525a9781@syzkaller.appspotmail.com
First crash: 802d, last: 802d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in addrconf_del_ifaddr (2) net 1 3 804d 830d 0/29 auto-obsoleted due to no activity on 2024/09/14 06:06
upstream INFO: task hung in addrconf_del_ifaddr net 1 1 3074d 3072d 0/29 auto-closed as invalid on 2019/02/22 10:34

Sample crash report:
INFO: task syz-executor.1:6537 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:syz-executor.1  state:D stack:25880 pid: 6537 ppid:  5480 flags:0x00004006
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
 addrconf_del_ifaddr+0xfb/0x1c0 net/ipv6/addrconf.c:3110
 inet6_ioctl+0x1ca/0x240 net/ipv6/af_inet6.c:588
 sock_do_ioctl+0x11d/0x5a0 net/socket.c:1140
 sock_ioctl+0x47f/0x770 net/socket.c:1257

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/17 13:15 linux-5.15.y 4878aadf2d15 1f11cfd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in addrconf_del_ifaddr
* Struck through repros no longer work on HEAD.