syzbot


INFO: task hung in __netlink_dump_start

Status: auto-obsoleted due to no activity on 2024/09/29 18:06
Reported-by: syzbot+0f57424862bc32fdfcc5@syzkaller.appspotmail.com
First crash: 310d, last: 165d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in __netlink_dump_start (2) net 5 1060d 1142d 0/28 closed as invalid on 2022/02/07 19:19
linux-4.19 INFO: task hung in __netlink_dump_start 1 1642d 1642d 0/1 auto-closed as invalid on 2020/10/04 12:25
upstream INFO: task hung in __netlink_dump_start net 2 1510d 1524d 0/28 auto-closed as invalid on 2021/01/13 23:36
linux-5.15 INFO: task hung in __netlink_dump_start 20 26d 290d 0/3 upstream: reported on 2024/02/18 03:22
linux-4.19 INFO: task hung in __netlink_dump_start (2) 1 1012d 1012d 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 148d 2111d 26/28 fixed on 2024/07/09 19:14
linux-6.1 INFO: task hung in __netlink_dump_start (2) origin:lts-only syz 3 12d 64d 0/3 upstream: reported syz repro on 2024/10/01 03:35

Sample crash report:
INFO: task dhcpcd:3216 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:dhcpcd          state:D stack:24376 pid:3216  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
 __netlink_dump_start+0x12e/0x6e0 net/netlink/af_netlink.c:2300
 netlink_dump_start include/linux/netlink.h:269 [inline]
 rtnetlink_rcv_msg+0xd4c/0xff0 net/core/rtnetlink.c:6077
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508

Crashes (16):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/21 18:05 linux-6.1.y eb44d83053d6 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/06/11 14:26 linux-6.1.y 88690811da69 b7d9eb04 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/06/09 18:52 linux-6.1.y 88690811da69 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/06/04 20:33 linux-6.1.y 88690811da69 11f2afa5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/05/31 18:45 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 __netlink_dump_start
2024/05/31 18:38 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 __netlink_dump_start
2024/05/31 11:34 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 __netlink_dump_start
2024/05/28 12:50 linux-6.1.y 88690811da69 f550015e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/03/19 06:53 linux-6.1.y d7543167affd baa80228 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/03/05 09:29 linux-6.1.y a3eb3a74aa8c 5fc53669 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/02/01 23:42 linux-6.1.y e5c3b988b827 81024119 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in __netlink_dump_start
2024/01/28 21:16 linux-6.1.y 883d1a956208 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: task hung in __netlink_dump_start
2024/06/16 10:57 linux-6.1.y ae9f2a70d69e f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/05/27 11:48 linux-6.1.y 88690811da69 761766e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/05/25 22:58 linux-6.1.y 88690811da69 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in __netlink_dump_start
2024/05/22 03:08 linux-6.1.y 4078fa637fcd 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in __netlink_dump_start
* Struck through repros no longer work on HEAD.