syzbot


WARNING in __nf_unregister_net_hook (2)
Status: fixed on 2020/09/16 22:51
Reported-by: syzbot+2570f2c036e3da5db176@syzkaller.appspotmail.com
Fix commit: 1e9451cbda45 netfilter: nf_tables: fix nat hook table deletion
First crash: 514d, last: 514d

Cause bisection: introduced by (bisect log) :
commit db8ab38880e06dedbfc879e75f5b0ddc495f4eb6
Author: Florian Westphal <fw@strlen.de>
Date: Thu Feb 28 11:02:52 2019 +0000

  netfilter: nf_tables: merge ipv4 and ipv6 nat chain types

Crash: WARNING in __nf_unregister_net_hook (log)
Repro: C syz .config
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __nf_unregister_net_hook (4) C error 47 48d 242d 21/22 upstream: reported C repro on 2021/04/10 14:49
upstream WARNING in __nf_unregister_net_hook 1 594d 590d 0/22 auto-closed as invalid on 2020/06/22 17:41
upstream WARNING in __nf_unregister_net_hook (3) 1 447d 447d 0/22 auto-closed as invalid on 2020/12/16 11:13

Sample crash report:

Crashes (9):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2020/07/12 14:06 upstream 0aea6d5c5be3 115e1930 .config log report syz C
ci-upstream-kasan-gce-root 2020/07/12 11:25 upstream 0aea6d5c5be3 115e1930 .config log report syz C
ci-upstream-kasan-gce 2020/07/12 11:00 upstream 0aea6d5c5be3 115e1930 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/07/12 10:50 upstream 0aea6d5c5be3 115e1930 .config log report syz C
ci-upstream-kasan-gce-386 2020/07/12 12:58 upstream 0aea6d5c5be3 115e1930 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/07/12 11:33 net 1df0d8960499 115e1930 .config log report syz C
ci-upstream-net-kasan-gce 2020/07/12 10:08 net-next 71930d61025e 115e1930 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/07/12 17:10 linux-next d31958b30ea3 115e1930 .config log report syz C
ci-upstream-net-kasan-gce 2020/07/12 09:57 net-next 71930d61025e 115e1930 .config log report