syzbot


INFO: task hung in ipv6_sock_ac_close

Status: auto-obsoleted due to no activity on 2024/09/10 18:53
Subsystems: net
[Documentation on labels]
First crash: 245d, last: 245d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in ipv6_sock_ac_close 1 2329d 2329d 0/3 auto-closed as invalid on 2019/03/27 06:43
upstream INFO: task can't die in ipv6_sock_ac_close net 1 1211d 1211d 0/28 auto-closed as invalid on 2021/12/19 14:00

Sample crash report:
INFO: task syz-executor.0:6487 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00243-g144ba8580bcb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:24672 pid:6487  tgid:6487  ppid:5122   flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 ipv6_sock_ac_close+0xc9/0x130 net/ipv6/anycast.c:219
 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:487
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbc/0x240 net/socket.c:1421
 __fput+0x406/0x8b0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f27c447cea9
RSP: 002b:00007ffdc22f8988 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f27c45b5980 RCX: 00007f27c447cea9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f27c45b5980 R08: 00000000819d6dff R09: 0000001d00000000
R10: 0000000080000000 R11: 0000000000000246 R12: 000000000001f7d2
R13: 00007f27c45b412c R14: 0000000000000032 R15: 00007f27c45b5980
 </TASK>
INFO: task syz-executor.4:6489 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00243-g144ba8580bcb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:24672 pid:6489  tgid:6489  ppid:5119   flags:0x00004006

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/12 18:51 net 144ba8580bcb 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in ipv6_sock_ac_close
2024/06/12 18:05 net 144ba8580bcb 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in ipv6_sock_ac_close
2024/06/12 16:24 net 144ba8580bcb 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in ipv6_sock_ac_close
2024/06/12 15:50 net 144ba8580bcb 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in ipv6_sock_ac_close
* Struck through repros no longer work on HEAD.