syzbot


INFO: task hung in vlan_ioctl_handler

Status: upstream: reported on 2024/01/25 03:05
Reported-by: syzbot+ad9baa313f195b39cf0e@syzkaller.appspotmail.com
First crash: 125d, last: 5d19h
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in vlan_ioctl_handler (2) 3 2d01h 3d16h 0/3 upstream: reported on 2024/05/25 22:51
upstream INFO: task can't die in vlan_ioctl_handler net 98 4d12h 730d 0/26 upstream: reported on 2022/05/30 07:14
linux-5.15 INFO: task hung in vlan_ioctl_handler 2 231d 272d 0/3 auto-obsoleted due to no activity on 2024/01/18 16:24

Sample crash report:
INFO: task dhcpcd:3217 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:24248 pid:3217  ppid:1      flags:0x00004002
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
 vlan_ioctl_handler+0x114/0x980 net/8021q/vlan.c:553
 sock_ioctl+0x53c/0x770 net/socket.c:1285
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f42d7d79d49

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/23 19:56 linux-6.1.y 4078fa637fcd 4c2072ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in vlan_ioctl_handler
2024/02/17 17:14 linux-6.1.y 8b4118fabd6e 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: task hung in vlan_ioctl_handler
2024/01/25 03:05 linux-6.1.y 8fd7f4462453 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in vlan_ioctl_handler
* Struck through repros no longer work on HEAD.