INFO: task hung in rtnl_newlink

Status: closed as invalid on 2026/10/06 01:41
Subsystems: net
[Documentation on labels]
First crash: 863d, last: 1d13h
Cause bisection: introduced by (bisect log) :
commit d15121be7485655129101f3960ae6add40204463
Author: Paolo Abeni <pabeni@redhat.com>
Date: Mon May 8 06:17:44 2023 +0000

  Revert "softirq: Let ksoftirqd do its job"

Crash: no output from test machine (log)
Repro: syz .config
  
▶ ▼ ✨ AI Jobs (9)
ID Workflow Result Correct Bug Created Started Finished Revision
fba0854e assessment-security 💥 INFO: task hung in rtnl_newlink 2026/10/05 09:53 2026/10/05 09:53 2026/10/05 10:18 57bbd979
1698b39f assessment-security 💥 INFO: task hung in rtnl_newlink 2026/09/04 07:40 2026/09/04 07:40 2026/09/04 08:02 801f0966
457e278b assessment-security 💥 INFO: task hung in rtnl_newlink 2026/08/05 00:05 2026/08/05 00:05 2026/08/05 00:05 d4abbeac
fdb98cda assessment-security 💥 INFO: task hung in rtnl_newlink 2026/07/05 07:16 2026/07/05 07:16 2026/07/05 07:35 93f57954
08eeebc9 assessment-security 💥 INFO: task hung in rtnl_newlink 2026/06/18 07:10 2026/06/18 07:10 2026/06/18 07:38 b62b3ded
75dfa1f1 assessment-security 💥 INFO: task hung in rtnl_newlink 2026/06/10 02:56 2026/06/10 02:56 2026/06/10 03:16 c36c07f6
a6094250 assessment-security 💥 INFO: task hung in rtnl_newlink 2026/06/04 05:35 2026/06/04 05:35 2026/06/04 05:51 62fe1528
ab8b3429 assessment-security 💥 INFO: task hung in rtnl_newlink 2026/06/02 00:55 2026/06/02 00:55 2026/06/02 01:24 386cc6da
75979b02 assessment-security 💥 INFO: task hung in rtnl_newlink 2026/05/20 09:07 2026/05/20 09:07 2026/05/20 09:34 0909d65f
▶ ▼ Similar bugs (13)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-12 INFO: task hung in rtnl_newlink 1 1 457d 457d 0/1 auto-obsoleted due to no activity on 2025/10/05 10:51
linux-4.19 INFO: task hung in rtnl_newlink 1 1 2043d 2043d 0/1 auto-closed as invalid on 2021/07/01 14:20
upstream INFO: rcu detected stall in sys_newfstatat (4) prio:high mm tomoyo 1 syz, C error 645 1d07h 1443d 0/29 upstream: reported C repro on 2022/10/25 00:38
linux-6.1 INFO: rcu detected stall in sys_newfstatat origin:upstream 1 syz, C done 8 669d 1206d 3/3 fixed on 2025/01/19 08:56
linux-6.1 INFO: rcu detected stall in sys_newfstatat (2) origin:lts-only 1 syz inconclusive 7 49d 587d 0/3 upstream: reported syz repro on 2025/02/26 19:28
linux-5.15 INFO: rcu detected stall in sys_newfstatat (2) origin:lts-only 1 syz, C done 16 94d 397d 0/3 upstream: reported C repro on 2025/09/04 12:06
upstream BUG: workqueue lockup (5) prio:low kernel 1 syz, C done 17899 3h57m 2457d 0/29 upstream: reported C repro on 2020/01/14 22:04
linux-6.6 INFO: rcu detected stall in sys_newfstatat (2) 1 7 11d 149d 0/2 upstream: reported on 2026/05/10 20:40
linux-5.15 INFO: rcu detected stall in sys_newfstatat 1 19 519d 912d 0/3 auto-obsoleted due to no activity on 2025/08/14 00:29
linux-6.6 INFO: rcu detected stall in sys_newfstatat 1 7 254d 356d 0/2 auto-obsoleted due to no activity on 2026/05/05 12:53
upstream INFO: rcu detected stall in sys_newfstatat (2) kernfs 1 1 1698d 1698d 0/29 auto-closed as invalid on 2022/05/13 02:53
upstream INFO: rcu detected stall in newfstatat (3) usb 1 syz, C done 284 16h12m 1215d 0/29 upstream: reported C repro on 2023/06/10 09:07
upstream INFO: rcu detected stall in sys_newfstatat (3) tomoyo 1 1 1585d 1585d 0/29 auto-closed as invalid on 2022/09/03 09:55
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/05/27 17:36 1h00m retest repro linux-next log
2026/05/27 17:22 21m retest repro upstream error
2026/05/27 17:22 20m retest repro upstream error
2026/02/23 14:30 24m retest repro upstream no crash log
2026/02/23 14:20 19m retest repro linux-next report log
2026/02/23 08:01 20m retest repro upstream report log
2026/02/23 08:01 19m retest repro upstream report log
2025/10/23 22:38 21m retest repro upstream report log
2025/10/23 22:20 8m retest repro linux-next error
2025/10/23 21:24 19m retest repro upstream report log

Sample crash report:
INFO: task syz-executor335:5342 blocked for more than 143 seconds.
      Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor335 state:D stack:19864 pid:5342  tgid:5342  ppid:5341   task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
 rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4020
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:728
 __sys_sendto+0x363/0x4c0 net/socket.c:2182
 __do_sys_sendto net/socket.c:2189 [inline]
 __se_sys_sendto net/socket.c:2185 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2185
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9f9d8643f3
RSP: 002b:00007ffccbbce0e8 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f9f9d8ed300 RCX: 00007f9f9d8643f3
RDX: 000000000000002c RSI: 00007f9f9d8ed350 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007ffccbbce104 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f9f9d8ed350 R15: 0000000000000000
 </TASK>
INFO: task syz-executor335:5347 blocked for more than 148 seconds.
      Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor335 state:D stack:21008 pid:5347  tgid:5347  ppid:5344   task_flags:0x400140 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnl_nets_lock net/core/rtnetlink.c:335 [inline]
 rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4020
 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:728
 __sys_sendto+0x363/0x4c0 net/socket.c:2182

Crashes (272):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/01 22:00 upstream 69e858e0b8b2 0dff8567 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: task hung in rtnl_newlink
2026/09/07 02:14 net-next 31f961de2f90 4f7b22a0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/02 07:26 net-next c8ea08ba34f2 587f6b29 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/23 11:04 upstream 50d05c7c76c9 abce1216 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in rtnl_newlink
2025/03/16 21:12 upstream cb82ca153949 e2826670 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: task hung in rtnl_newlink
2026/09/06 13:36 net-next 31f961de2f90 4f7b22a0 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2024/12/24 18:20 linux-next 8155b4ef3466 444551c4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in rtnl_newlink
2026/10/05 17:46 upstream 67f0943b394d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in rtnl_newlink
2026/10/03 12:39 upstream e767a4ea70a3 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in rtnl_newlink
2026/10/02 13:33 upstream ce1e0223d8ad 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in rtnl_newlink
2026/09/30 09:14 upstream 6f8319e3e9a4 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in rtnl_newlink
2026/09/29 03:54 upstream 72d3fcf802c4 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in rtnl_newlink
2026/09/28 23:24 upstream 72d3fcf802c4 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in rtnl_newlink
2026/09/28 10:07 upstream 72d3fcf802c4 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in rtnl_newlink
2026/09/26 02:56 upstream aa98230e410f f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in rtnl_newlink
2026/09/26 01:33 upstream aa98230e410f f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in rtnl_newlink
2026/09/25 12:18 upstream 165768bb7026 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in rtnl_newlink
2026/09/24 20:54 upstream 62f4c998b297 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in rtnl_newlink
2026/09/22 14:41 upstream f0100363d8c3 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in rtnl_newlink
2026/04/14 05:15 upstream 26ff969926a0 1a086e7c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in rtnl_newlink
2026/01/20 10:51 upstream 24d479d26b25 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in rtnl_newlink
2025/08/26 11:37 upstream b6add54ba618 bf27483f .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in rtnl_newlink
2024/12/20 16:20 upstream 8faabc041a00 1ac6aa80 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in rtnl_newlink
2026/02/09 08:00 upstream e98f34af6116 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in rtnl_newlink
2026/10/05 21:47 net aaaaf87ea99b 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/05 15:18 net aaaaf87ea99b 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/05 11:38 net 5158353121ba 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/05 09:12 net 5158353121ba 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/04 23:09 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/04 12:26 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/02 21:17 net 71a77ab76e74 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/02 00:46 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/01 20:45 net 3cdeaef1754a 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/01 09:31 net 3cdeaef1754a 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/30 16:00 net 2e7ea988a032 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/30 14:14 net 2e7ea988a032 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/30 12:52 net 2e7ea988a032 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/30 07:46 net 54518e0e827f 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/29 12:50 net 6b2462f07cb7 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/29 10:49 net 6b2462f07cb7 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/29 09:40 net 6b2462f07cb7 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/28 09:06 net a7bfaba4823e a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/27 23:49 net a7bfaba4823e a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/27 17:08 net a7bfaba4823e a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/27 06:50 net a7bfaba4823e a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/27 04:49 net a7bfaba4823e a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/26 14:46 net aadf655e8ea9 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/25 23:29 net 11536ee3d3e0 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/24 16:42 net ab1404ac8115 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/24 06:07 net ab1404ac8115 0a1606bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/21 01:18 net c82b797abe66 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/09/20 21:18 net c82b797abe66 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in rtnl_newlink
2026/10/04 17:51 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/10/04 15:12 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/30 22:13 net-next 47a144672573 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/29 21:53 net-next 6e23f90f2b8c 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/27 14:30 net-next 014d795c7383 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/24 09:30 net-next a9e94a7faa56 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/22 02:26 net-next 2fba93180872 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/20 12:13 net-next a4e22e9253e7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in rtnl_newlink
2026/09/15 22:25 linux-next 9d80aa4617b3 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in rtnl_newlink
2026/09/13 20:40 linux-next a9d7ced84989 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in rtnl_newlink
2026/01/13 08:08 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 56a512a9b410 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: task hung in rtnl_newlink
2026/09/26 12:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in rtnl_newlink
2026/08/09 10:29 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 06cf61899d64 5d63f80b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 INFO: task hung in rtnl_newlink
2025/08/03 09:02 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next fda589c28604 7368264b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 INFO: task hung in rtnl_newlink
* Struck through repros no longer work on HEAD.