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unregister_netdevice: waiting for DEV to become free

Status: upstream: reported C repro on 2025/06/18 00:40
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+009b6836b8e397538463@syzkaller.appspotmail.com
First crash: 185d, last: 1h24m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/06/26 linux-6.6.y (ToT) 6282921b6825 C [report] unregister_netdevice: waiting for DEV to become free
2025/06/26 upstream (ToT) ee88bddf7f2f C Didn't crash
▶ ▼ Similar bugs (16)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream unregister_netdevice: waiting for DEV to become free (3) 2 C 1864 2074d 2135d 15/29 fixed on 2020/04/15 17:19
upstream unregister_netdevice: waiting for DEV to become free (6) 2 C error 13128 1382d 1501d 20/29 fixed on 2022/03/08 16:11
upstream unregister_netdevice: waiting for DEV to become free 2 C 170521 2690d 2801d 8/29 fixed on 2018/08/08 18:10
linux-4.14 unregister_netdevice: waiting for DEV to become free 2 C done 120 1997d 2436d 1/1 fixed on 2020/08/02 06:53
linux-5.15 unregister_netdevice: waiting for DEV to become free missing-backport origin:upstream 2 C done 9398 4h24m 1018d 0/3 upstream: reported C repro on 2023/03/07 22:57
android-49 unregister_netdevice: waiting for DEV to become free 2 C 52164 2217d 2444d 0/3 public: reported C repro on 2019/04/11 08:44
android-44 unregister_netdevice: waiting for DEV to become free 2 C 4307 2279d 2444d 0/2 public: reported C repro on 2019/04/11 08:44
linux-4.14 unregister_netdevice: waiting for DEV to become free (2) fat hfsplus bfs vfs gfs2 udf xfs reiserfs sysv btrfs f2fs 2 C 651522 1018d 1954d 0/1 upstream: reported C repro on 2020/08/13 09:52
android-414 unregister_netdevice: waiting for DEV to become free 2 1231 2220d 2443d 0/1 auto-closed as invalid on 2020/02/19 10:10
upstream unregister_netdevice: waiting for DEV to become free (4) 2 C done 50394 1745d 1948d 19/29 fixed on 2021/03/10 01:48
linux-6.1 unregister_netdevice: waiting for DEV to become free origin:upstream missing-backport 2 C inconclusive 3868 32m 1018d 0/3 upstream: reported C repro on 2023/03/07 18:05
upstream unregister_netdevice: waiting for DEV to become free (8) net 2 C done 427688 now 924d 2/29 upstream: reported C repro on 2023/06/10 01:34
upstream unregister_netdevice: waiting for DEV to become free (2) 2 C done 385621 2136d 2683d 15/29 fixed on 2020/02/14 01:19
linux-4.19 unregister_netdevice: waiting for DEV to become free 2 C 5316 1018d 2445d 0/1 upstream: reported C repro on 2019/04/10 19:11
upstream unregister_netdevice: waiting for DEV to become free (5) 2 C done 40035 1501d 1745d 20/29 fixed on 2021/11/10 00:50
upstream unregister_netdevice: waiting for DEV to become free (7) 2 C inconclusive 20422 925d 1127d 22/29 fixed on 2023/06/08 14:41
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/09/30 08:26 1h51m fix candidate upstream OK (0) job log

Sample crash report:
unregister_netdevice: waiting for vcan0 to become free. Usage count = 2

Crashes (357):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/15 13:42 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 05:51 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 01:44 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/04 12:42 linux-6.6.y 4791134e4aeb d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/11/12 08:45 linux-6.6.y 0a805b6ea8cd 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf unregister_netdevice: waiting for DEV to become free
2025/11/12 04:27 linux-6.6.y 0a805b6ea8cd 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf unregister_netdevice: waiting for DEV to become free
2025/09/01 16:21 linux-6.6.y cc1a1c5b404a 807a3b61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/06/25 15:26 linux-6.6.y 6282921b6825 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf unregister_netdevice: waiting for DEV to become free
2025/12/20 00:11 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/19 20:11 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/19 18:47 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/19 06:32 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/19 03:36 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/19 00:20 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/18 22:31 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/18 07:25 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/18 04:25 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/18 03:01 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/17 21:12 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/17 13:34 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/17 11:28 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/16 15:59 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/16 05:33 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/16 04:30 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/15 05:04 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/15 03:42 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/14 23:22 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/14 19:26 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/14 16:21 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/14 10:55 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/14 05:15 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/14 02:54 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 18:07 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 16:06 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 13:22 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 10:34 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 07:43 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 06:37 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 06:19 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 02:36 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 01:34 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/13 00:05 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 19:43 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 17:58 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 14:13 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 05:11 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/12 04:01 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/11 22:02 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/11 19:13 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/11 16:32 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/11 05:21 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/11 02:16 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/10 23:37 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/10 13:08 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/10 01:21 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/09 12:26 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2025/12/08 07:45 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf unregister_netdevice: waiting for DEV to become free
2025/06/18 00:39 linux-6.6.y c2603c511feb e77fae15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan-perf unregister_netdevice: waiting for DEV to become free
* Struck through repros no longer work on HEAD.