syzbot


INFO: task hung in __netlink_dump_start

Status: upstream: reported on 2024/02/18 03:22
Reported-by: syzbot+070a3f54367800fa9f28@syzkaller.appspotmail.com
First crash: 148d, last: 19d
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in __netlink_dump_start (2) net 5 918d 1000d 0/27 closed as invalid on 2022/02/07 19:19
linux-4.19 INFO: task hung in __netlink_dump_start 1 1500d 1500d 0/1 auto-closed as invalid on 2020/10/04 12:25
upstream INFO: task hung in __netlink_dump_start net 2 1368d 1383d 0/27 auto-closed as invalid on 2021/01/13 23:36
linux-4.19 INFO: task hung in __netlink_dump_start (2) 1 871d 871d 0/1 auto-closed as invalid on 2022/06/25 14:03
upstream INFO: task hung in rtnetlink_rcv_msg net C inconclusive inconclusive 1970 6d11h 1969d 27/27 fixed on 2024/07/09 19:14
linux-6.1 INFO: task hung in __netlink_dump_start 16 23d 168d 0/3 upstream: reported on 2024/01/28 21:16

Sample crash report:
INFO: task syz-executor.3:3931 blocked for more than 143 seconds.
      Not tainted 5.15.160-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26296 pid: 3931 ppid:  3539 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
 __netlink_dump_start+0x12e/0x6f0 net/netlink/af_netlink.c:2351
 netlink_dump_start include/linux/netlink.h:258 [inline]
 rtnetlink_rcv_msg+0xbfe/0xee0 net/core/rtnetlink.c:5592

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/15 12:30 linux-5.15.y c61bd26ae81a f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/06/12 07:37 linux-5.15.y c61bd26ae81a 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/06/11 23:47 linux-5.15.y c61bd26ae81a 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/06/05 04:45 linux-5.15.y c61bd26ae81a e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/06/05 04:33 linux-5.15.y c61bd26ae81a e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/05/24 22:21 linux-5.15.y 83655231580b a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/05/23 14:27 linux-5.15.y 83655231580b 4c2072ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in __netlink_dump_start
2024/02/18 03:21 linux-5.15.y 6139f2a02fe0 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: task hung in __netlink_dump_start
2024/06/26 12:42 linux-5.15.y 4878aadf2d15 c6d33a01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/06/18 10:37 linux-5.15.y 4878aadf2d15 ce6011bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/06/15 18:30 linux-5.15.y c61bd26ae81a f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/06/12 15:02 linux-5.15.y c61bd26ae81a f815599d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/06/08 05:41 linux-5.15.y c61bd26ae81a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/06/06 07:37 linux-5.15.y c61bd26ae81a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in __netlink_dump_start
* Struck through repros no longer work on HEAD.