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: 50d, last: 1h53m
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 (4)
Title Replies (including bot) Last reply
[syzbot] Monthly net report (Jun 2026) 0 (1) 2026/06/23 20:32
[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 2262d 2323d 15/29 fixed on 2020/04/15 17:19
upstream unregister_netdevice: waiting for DEV to become free (6) 2 C error 13128 1570d 1689d 20/29 fixed on 2022/03/08 16:11
upstream unregister_netdevice: waiting for DEV to become free 2 C 170521 2878d 2989d 8/29 fixed on 2018/08/08 18:10
linux-4.14 unregister_netdevice: waiting for DEV to become free 2 C done 120 2185d 2624d 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 10484 1h46m 1206d 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 2405d 2632d 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 2467d 2632d 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 1206d 2142d 0/1 upstream: reported C repro on 2020/08/13 09:52
android-414 unregister_netdevice: waiting for DEV to become free 2 1231 2408d 2631d 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 1934d 2136d 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 744 1d17h 373d 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 5345 8h37m 1206d 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 50d 1112d 29/29 fixed on 2026/05/06 19:02
upstream unregister_netdevice: waiting for DEV to become free (2) 2 C done 385621 2324d 2871d 15/29 fixed on 2020/02/14 01:19
linux-4.19 unregister_netdevice: waiting for DEV to become free 2 C 5316 1206d 2633d 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 1689d 1934d 20/29 fixed on 2021/11/10 00:50
upstream unregister_netdevice: waiting for DEV to become free (7) 2 C inconclusive 20422 1113d 1315d 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 (2526):
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
2026/06/24 16:32 net-next b85966adbf5d c1da772e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/05/21 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
2026/06/22 00:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 92e3f6ef4ffb 43bfcdb0 .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 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
2026/06/24 20:42 upstream 840ef6c78e6a c1da772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root unregister_netdevice: waiting for DEV to become free
2026/06/23 08:12 upstream 4708cac0e22c 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto unregister_netdevice: waiting for DEV to become free
2026/06/23 00:19 upstream ef0c9f75a195 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root unregister_netdevice: waiting for DEV to become free
2026/06/22 17:39 upstream ef0c9f75a195 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 08:40 upstream 8cd8cf7a07e5 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root unregister_netdevice: waiting for DEV to become free
2026/06/14 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
2026/06/21 13:44 upstream 390d73adf896 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 unregister_netdevice: waiting for DEV to become free
2026/06/25 18:32 upstream ab9de95c9cf9 432fd51a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/06/23 13:46 upstream 502d801f0ab0 4b1d8f01 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/06/22 10:05 upstream ef0c9f75a195 ab2703f0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream unregister_netdevice: waiting for DEV to become free
2026/06/24 22:51 upstream f0e6f20cb52b cfa969bf .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 unregister_netdevice: waiting for DEV to become free
2026/06/26 00:34 net 02f144fbb4c8 432fd51a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 10:29 net 6bd81a5b4e0d cfa969bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 08:28 net 6bd81a5b4e0d cfa969bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 01:21 net d87363b0edfc cfa969bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 21:46 net d87363b0edfc c1da772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 02:31 net e82d8cc4321c 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 19:21 net a986fde914d8 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 18:14 net a986fde914d8 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 16:21 net a986fde914d8 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 02:48 net d07d80b6a129 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 02:27 net d07d80b6a129 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 01:20 net d07d80b6a129 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 21:55 net d07d80b6a129 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 06:46 net 1579342d7113 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/21 21:18 net 96e7f9122aae 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/21 19:46 net 96e7f9122aae 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/19 00:51 bpf e771677c937d a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 23:18 net-next b85966adbf5d 432fd51a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 19:42 net-next b85966adbf5d 432fd51a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 15:41 net-next b85966adbf5d 432fd51a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 07:18 net-next b85966adbf5d cfa969bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/25 06:14 net-next b85966adbf5d cfa969bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 19:30 net-next b85966adbf5d c1da772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 16:39 net-next b85966adbf5d c1da772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 14:32 net-next b85966adbf5d c1da772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 12:45 net-next b85966adbf5d c1da772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 09:45 net-next b85966adbf5d 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 06:46 net-next b85966adbf5d 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 04:33 net-next b85966adbf5d 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/24 00:52 net-next b85966adbf5d 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 20:31 net-next b85966adbf5d 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 12:25 net-next b85966adbf5d 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 09:42 net-next b85966adbf5d 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 05:39 bpf-next a975094bf98c 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/23 03:59 net-next b85966adbf5d 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 20:18 bpf-next a975094bf98c 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 18:56 net-next b85966adbf5d 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 14:42 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 13:41 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 11:18 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 04:57 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/22 02:06 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/21 23:45 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/21 22:30 net-next b85966adbf5d 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce unregister_netdevice: waiting for DEV to become free
2026/06/19 12:45 linux-next 598c7067dd8b d7ffd47b .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
2026/06/25 21:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 92e3f6ef4ffb 432fd51a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/24 07:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 92e3f6ef4ffb 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/23 22:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 92e3f6ef4ffb 042555ff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/21 15:05 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 390d73adf896 43bfcdb0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte unregister_netdevice: waiting for DEV to become free
2026/06/19 20:21 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 9ecfb2f7287a 023e42b5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64 unregister_netdevice: waiting for DEV to become free
2026/06/18 02:52 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 4b99990cdf95 b62b3ded .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-compat unregister_netdevice: waiting for DEV to become free
* Struck through repros no longer work on HEAD.