syzbot

 sign-in | mailing list | source | docs
🐞 Open [854]
🐞 Fixed [139]
🐞 Invalid [974]
⬇ Missing Backports [75]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

INFO: task hung in dev_ioctl

Status: auto-obsoleted due to no activity on 2024/09/25 07:18
Reported-by: syzbot+58387a7b87f2c977178f@syzkaller.appspotmail.com
First crash: 579d, last: 563d
▶ ▼ Similar bugs (14)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in dev_ioctl (4) net 1 1 1689d 1689d 0/29 auto-closed as invalid on 2021/08/15 15:56
linux-4.14 INFO: task hung in dev_ioctl 1 1 1352d 1352d 0/1 auto-closed as invalid on 2022/08/17 13:11
android-49 INFO: task hung in dev_ioctl 1 1 2734d 2734d 0/3 auto-closed as invalid on 2019/02/22 12:59
upstream INFO: task hung in dev_ioctl (2) net 1 1 2448d 2448d 0/29 closed as invalid on 2019/05/08 13:05
android-414 INFO: task hung in dev_ioctl 1 2 2651d 2671d 0/1 auto-closed as invalid on 2019/03/27 22:33
android-414 INFO: task hung in dev_ioctl (2) 1 1 2224d 2224d 0/1 auto-closed as invalid on 2020/03/28 22:15
upstream INFO: task hung in rtnetlink_rcv_msg net 1 C inconclusive inconclusive 1970 541d 2504d 26/29 fixed on 2024/07/09 19:14
upstream INFO: task hung in dev_ioctl (7) net 1 syz 6 298d 298d 0/29 closed as invalid on 2025/04/08 14:38
upstream INFO: task hung in dev_ioctl (8) net 1 1 109d 109d 0/29 auto-obsoleted due to no activity on 2025/12/12 19:44
upstream INFO: task hung in dev_ioctl net 1 2 2649d 2677d 0/29 auto-closed as invalid on 2019/03/30 00:48
upstream INFO: task hung in dev_ioctl (6) net 1 12 442d 467d 0/29 auto-obsoleted due to no activity on 2024/12/04 23:50
upstream INFO: task hung in dev_ioctl (3) net 1 7 1826d 1954d 0/29 auto-closed as invalid on 2021/04/01 04:28
linux-5.15 INFO: task hung in dev_ioctl 1 2 583d 588d 0/3 auto-obsoleted due to no activity on 2024/09/05 06:34
upstream INFO: task hung in dev_ioctl (5) net 1 20 1533d 1578d 0/29 auto-closed as invalid on 2022/01/19 01:57

Sample crash report:
INFO: task syz-executor.1:6010 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-executor.1  state:D stack:29096 pid:6010  ppid:4700   flags:0x00004006
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
 dev_ioctl+0x59c/0xf70 net/core/dev_ioctl.c:612
 sock_ioctl+0x68f/0x770 net/socket.c:1248
 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: 0033:0x7fabc827cea9
RSP: 002b:00007fabc8f5f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/17 07:18 linux-6.1.y eb44d83053d6 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in dev_ioctl
2024/06/05 17:50 linux-6.1.y 88690811da69 5aa1a7c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in dev_ioctl
2024/05/31 11:33 linux-6.1.y 88690811da69 0c378259 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in dev_ioctl
* Struck through repros no longer work on HEAD.