syzbot


kernel BUG at net/core/dev.c:NUM!
Status: fixed on 2021/03/10 01:49
Reported-by: syzbot+2393580080a2da190f04@syzkaller.appspotmail.com
Fix commit: 47e4bb147a96 net: sit: unregister_netdevice on newlink's error path
First crash: 329d, last: 324d

Cause bisection: introduced by (bisect log) :
commit c269a24ce057abfc31130960e96ab197ef6ab196
Author: Jakub Kicinski <kuba@kernel.org>
Date: Wed Jan 6 18:40:06 2021 +0000

  net: make free_netdev() more lenient with unregistering devices

Crash: kernel BUG at net/core/dev.c:NUM! (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/01/13 19:41 15m kuba@kernel.org git://git.kernel.org/pub/scm/linux/kernel/git/kuba/linux.git sit-fix OK

Sample crash report:

Crashes (35):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-this-kasan-gce 2021/01/09 12:06 net c49243e88982 a6c52263 .config log report syz C
ci-upstream-net-this-kasan-gce 2021/01/14 05:43 net a95d25dd7b94 269d24e8 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/13 03:11 net 1ee527a79fa6 0cdd6185 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/12 16:55 net 1ee527a79fa6 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/12 07:18 net 938288349ca8 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/11 21:58 net f97844f9c518 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/11 08:34 net f97844f9c518 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/11 04:35 net f97844f9c518 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/10 21:33 net f97844f9c518 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/10 18:00 net f97844f9c518 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/10 02:42 net c49243e88982 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 14:49 net c49243e88982 a6c52263 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 11:03 net c49243e88982 a6c52263 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 10:55 net c49243e88982 a6c52263 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 10:49 net c49243e88982 a6c52263 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 10:40 net c49243e88982 a6c52263 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 10:22 net c49243e88982 a6c52263 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/09 10:21 net c49243e88982 a6c52263 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/14 22:09 linux-next 9152a993930d 65a7a854 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/14 04:57 linux-next aa515cdce7a1 269d24e8 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/13 00:39 linux-next df869cab4b35 0cdd6185 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/13 00:39 linux-next df869cab4b35 0cdd6185 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/13 00:39 linux-next df869cab4b35 0cdd6185 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 10:06 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 09:13 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 09:10 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 09:06 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 08:46 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 08:16 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 07:51 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 07:49 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 07:11 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 05:59 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 05:53 linux-next ef8b014ee4a1 2c1f2513 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/01/11 05:40 linux-next ef8b014ee4a1 2c1f2513 .config log report info