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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: 208d, last: 13h03m
▶ ▼ 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 2097d 2159d 15/29 fixed on 2020/04/15 17:19
upstream unregister_netdevice: waiting for DEV to become free (6) 2 C error 13128 1405d 1524d 20/29 fixed on 2022/03/08 16:11
upstream unregister_netdevice: waiting for DEV to become free 2 C 170521 2713d 2824d 8/29 fixed on 2018/08/08 18:10
linux-4.14 unregister_netdevice: waiting for DEV to become free 2 C done 120 2020d 2459d 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 9463 11h03m 1041d 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 2241d 2468d 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 2302d 2468d 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 1042d 1978d 0/1 upstream: reported C repro on 2020/08/13 09:52
android-414 unregister_netdevice: waiting for DEV to become free 2 1231 2244d 2466d 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 1769d 1971d 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 4143 11h16m 1041d 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 438529 now 947d 20/29 upstream: reported C repro on 2023/06/10 01:34
upstream unregister_netdevice: waiting for DEV to become free (2) 2 C done 385621 2159d 2706d 15/29 fixed on 2020/02/14 01:19
linux-4.19 unregister_netdevice: waiting for DEV to become free 2 C 5316 1042d 2468d 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 1524d 1769d 20/29 fixed on 2021/11/10 00:50
upstream unregister_netdevice: waiting for DEV to become free (7) 2 C inconclusive 20422 949d 1151d 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 (531):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/01 20:24 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
2025/12/26 01:09 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
2025/12/15 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
2026/01/12 00:25 linux-6.6.y c596736dadab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan unregister_netdevice: waiting for DEV to become free
2026/01/11 14:51 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
2026/01/11 06:52 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
2026/01/10 23:50 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
2026/01/10 20:46 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
2026/01/10 19:46 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
2026/01/10 12:21 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
2026/01/09 22:40 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
2026/01/09 14:41 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
2026/01/09 06:23 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
2026/01/08 23:38 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
2026/01/08 17:27 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
2026/01/08 14:43 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
2026/01/08 12:36 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
2026/01/08 11:10 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
2026/01/08 06:59 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
2026/01/08 02:35 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
2026/01/07 20:19 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
2026/01/07 18:28 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
2026/01/07 09:17 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
2026/01/07 07:54 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
2026/01/07 06:17 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
2026/01/07 02:11 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
2026/01/06 23:30 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
2026/01/06 10:06 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
2026/01/06 08:55 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
2026/01/06 07:35 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
2026/01/06 04:39 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
2026/01/05 23:09 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
2026/01/05 19:42 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
2026/01/05 12:35 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
2026/01/05 09:43 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
2026/01/05 03:08 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
2026/01/05 01:30 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
2026/01/04 16:52 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
2026/01/04 15:17 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
2026/01/04 12:50 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
2026/01/03 23:34 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
2026/01/03 13:17 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
2026/01/03 10:45 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
2026/01/03 03:23 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
2026/01/03 02:34 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
2026/01/02 23:47 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
2025/06/18 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.