syzbot


WARNING: refcount bug in in_dev_finish_destroy
Status: internal: reported C repro on 2021/03/27 06:54
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 0d7a7b2014b1 ipv6: remove extra dev_hold() for fallback tunnels
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-arm32]
First crash: 119d, last: 112d

Cause bisection: introduced by (bisect log) [merge commit]:
commit d64c6f96ba86bd8b97ed8d6762a8c8cc1770d214
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu Dec 17 21:45:24 2020 +0000

  Merge tag 'net-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Crash: WARNING: ODEBUG bug in netdev_run_todo (log)
Repro: C syz .config

Sample crash report:

Crashes (456):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-kasan-gce 2021/03/27 19:38 net-next a1281601f88e a8529b82 .config log report syz C WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/27 14:28 bpf-next 36e798516078 a8529b82 .config log report syz C WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/27 11:44 net-next a1281601f88e a8529b82 .config log report syz C WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/29 01:14 net-next a1281601f88e a8529b82 .config log report syz WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/28 01:01 bpf-next 36e798516078 a8529b82 .config log report syz WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/27 21:06 net-next a1281601f88e a8529b82 .config log report syz WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/27 14:09 net-next a1281601f88e a8529b82 .config log report syz WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-linux-next-kasan-gce-root 2021/03/27 15:25 linux-next 931294922e65 a8529b82 .config log report syz WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 22:28 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 21:05 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 19:35 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 18:31 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 12:57 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 08:09 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 06:38 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/02 04:23 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 19:31 bpf-next 89d69c5d0fbc 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 17:53 bpf-next e27bfefb21f2 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 16:15 bpf-next e27bfefb21f2 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 13:22 bpf-next e27bfefb21f2 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 07:10 bpf-next e27bfefb21f2 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 05:49 bpf-next e27bfefb21f2 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/04/01 04:39 bpf-next 235fc0e36d35 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/31 23:57 bpf-next 235fc0e36d35 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/31 22:37 bpf-next 235fc0e36d35 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/31 21:30 bpf-next 235fc0e36d35 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 20:17 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 19:05 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 18:02 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 16:37 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 15:46 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/31 14:43 bpf-next 235fc0e36d35 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 13:19 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/31 11:54 bpf-next 2976706f3408 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 10:07 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 08:53 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 07:55 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 06:28 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 04:17 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 03:16 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 02:49 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/31 00:19 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 21:18 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 20:19 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/30 18:58 bpf-next 7aae231ac93b 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 17:52 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 16:49 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 16:06 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 14:39 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 13:30 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 13:09 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 12:00 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/30 10:51 bpf-next 7aae231ac93b 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 09:32 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 08:24 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/30 07:28 bpf-next 7aae231ac93b 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/30 05:44 bpf-next 7aae231ac93b 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 04:42 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 03:12 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-net-kasan-gce 2021/03/30 02:08 net-next 37f368d8d09d 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-bpf-next-kasan-gce 2021/03/27 06:53 bpf-next 36e798516078 a8529b82 .config log report info WARNING: refcount bug in in_dev_finish_destroy
ci-upstream-linux-next-kasan-gce-root 2021/03/30 22:26 linux-next 931294922e65 6a81331a .config log report info WARNING: refcount bug in in_dev_finish_destroy