syzbot


unregister_netdevice: waiting for DEV to become free (9)

Status: upstream: reported syz repro on 2026/05/10 20:18
Subsystems: net
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+e2af46126e0644cbebdd@syzkaller.appspotmail.com
First crash: 41d, last: 24m
Cause bisection: failed (error log, bisect log)
  
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
a56d6cd1-f683-41b2-b18b-8d85afb9c4f7 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ unregister_netdevice: waiting for DEV to become free (9) 2026/05/18 11:45 2026/05/18 11:45 2026/05/18 12:38 55156e845761fb36809c4b3701a920dddce23332

			
		
Discussions (3)
Title Replies (including bot) Last reply
[PATCH net] net: neighbour: reject neighbor creation on IFF_NOARP devices 1 (1) 2026/05/15 15:05
[PATCH net v2] ipv6: addrconf: skip autoconf on unregistering devices 6 (6) 2026/05/14 13:39
[syzbot] [net?] unregister_netdevice: waiting for DEV to become free (9) 0 (9) 2026/05/14 11:58
Similar bugs (17)
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 2253d 2315d 15/29 fixed on 2020/04/15 17:19
upstream unregister_netdevice: waiting for DEV to become free (6) 2 C error 13128 1562d 1680d 20/29 fixed on 2022/03/08 16:11
upstream unregister_netdevice: waiting for DEV to become free 2 C 170521 2869d 2981d 8/29 fixed on 2018/08/08 18:10
linux-4.14 unregister_netdevice: waiting for DEV to become free 2 C done 120 2176d 2615d 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 10442 2h26m 1197d 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 2397d 2624d 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 2459d 2624d 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 1198d 2134d 0/1 upstream: reported C repro on 2020/08/13 09:52
android-414 unregister_netdevice: waiting for DEV to become free 2 1231 2400d 2622d 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 1925d 2128d 19/29 fixed on 2021/03/10 01:48
linux-6.6 unregister_netdevice: waiting for DEV to become free origin:lts-only 2 C inconclusive 734 8h09m 364d 0/2 upstream: reported C repro on 2025/06/18 00:40
linux-6.1 unregister_netdevice: waiting for DEV to become free origin:upstream missing-backport 2 C inconclusive 5281 8h23m 1197d 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 443850 42d 1103d 29/29 fixed on 2026/05/06 19:02
upstream unregister_netdevice: waiting for DEV to become free (2) 2 C done 385621 2315d 2862d 15/29 fixed on 2020/02/14 01:19
linux-4.19 unregister_netdevice: waiting for DEV to become free 2 C 5316 1198d 2624d 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 1680d 1925d 20/29 fixed on 2021/11/10 00:50
upstream unregister_netdevice: waiting for DEV to become free (7) 2 C inconclusive 20422 1105d 1307d 22/29 fixed on 2023/06/08 14:41
Last patch testing requests (8)
Created Duration User Patch Repo Result
2026/05/14 11:58 28m raoxu@uniontech.com git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2026/05/14 11:12 29m raoxu@uniontech.com patch git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2026/05/14 08:24 27m raoxu@uniontech.com patch git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2026/05/14 06:48 16m raoxu@uniontech.com git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main error
2026/05/14 04:02 1h14m raoxu@uniontech.com patch git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main error
2026/05/14 02:36 7m raoxu@uniontech.com patch git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main error
2026/05/14 02:08 8m raoxu@uniontech.com patch git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main error
2026/05/14 01:51 7m raoxu@uniontech.com patch git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git main error

Sample crash report:
unregister_netdevice: waiting for netdevsim3 to become free. Usage count = 2

Crashes (2256):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/30 09:08 upstream 9215e74f228f 6b4a8443 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root unregister_netdevice: waiting for DEV to become free
2026/05/23 14:03 upstream 79bd2dded182 c69befb3 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/05/30 12:12 net 78ef59e7a645 6b4a8443 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/05/21 04:45 net-next 0ae361f7e43c 41b8c833 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 13:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c2a9495bd873 1d2f3589 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/15 00:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c2a9495bd873 1d2f3589 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/06 22:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ffe7bef3786c cc095639 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/06 09:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ffe7bef3786c cc095639 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/05/31 15:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 4b4362973b6f 6b4a8443 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/05/16 00:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5cbb61bf4168 81fb92f3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/05/15 16:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5cbb61bf4168 9cd3beaa .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/05/15 12:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5cbb61bf4168 9cd3beaa .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/05/10 15:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5cbb61bf4168 29233ece .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/17 03:01 upstream 6b5a2b7d9bc1 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root unregister_netdevice: waiting for DEV to become free
2026/06/17 02:51 upstream 6b5a2b7d9bc1 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root unregister_netdevice: waiting for DEV to become free
2026/06/16 07:42 upstream 0e0611827f33 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root unregister_netdevice: waiting for DEV to become free
2026/06/15 16:23 upstream 0e0611827f33 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root unregister_netdevice: waiting for DEV to become free
2026/06/15 02:53 upstream 8cd9520d35a6 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/14 20:43 upstream e21ee273e6fa 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root unregister_netdevice: waiting for DEV to become free
2026/06/09 08:40 upstream 2d3090a8aeb5 656e94c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs unregister_netdevice: waiting for DEV to become free
2026/05/20 20:09 upstream 27fa82620cba 62fb93a2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root unregister_netdevice: waiting for DEV to become free
2026/06/13 03:19 upstream 1dadb7e7eb5a 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 unregister_netdevice: waiting for DEV to become free
2026/06/16 16:38 upstream b1cbabe84ca1 a3998659 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/06/16 12:05 upstream b1cbabe84ca1 a3998659 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/06/16 00:51 upstream 0e0611827f33 50bb0618 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/06/14 19:22 upstream 8cd9520d35a6 4f06757f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 unregister_netdevice: waiting for DEV to become free
2026/06/17 15:52 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 14:49 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 13:46 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 13:37 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 12:23 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 11:01 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 10:59 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 09:49 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 08:37 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 07:53 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 06:38 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 04:28 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 01:35 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 00:06 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 22:59 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 22:55 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 19:44 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 18:33 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 16:54 net fbc6a80cb5d3 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 15:38 net fbc6a80cb5d3 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 14:37 net fbc6a80cb5d3 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 13:29 net fbc6a80cb5d3 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 12:13 net fbc6a80cb5d3 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 10:58 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 09:44 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 08:37 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 06:36 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 05:32 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 04:25 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 03:24 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 03:23 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 02:03 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/16 01:01 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 23:46 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 22:44 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 22:09 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 21:09 net 62821d481975 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 19:42 net 47186409c092 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 19:06 net 47186409c092 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 18:02 net 47186409c092 50bb0618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/13 14:50 bpf e7ae89a0c97c 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/15 15:18 net-next 2319688890d9 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/05/16 19:37 linux-next e98d21c170b0 a15a64a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root unregister_netdevice: waiting for DEV to become free
2026/05/08 15:18 linux-next e98d21c170b0 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/17 05:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c2a9495bd873 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/16 21:28 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master b1cbabe84ca1 a3998659 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-compat unregister_netdevice: waiting for DEV to become free
2026/06/09 09:06 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 2d3090a8aeb5 656e94c6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64 unregister_netdevice: waiting for DEV to become free
* Struck through repros no longer work on HEAD.