syzbot


WARNING in tcp_enter_loss (2)
Status: fixed on 2020/02/18 10:28
Reported-by: syzbot+c5a3099b94cbdd9cd6da@syzkaller.appspotmail.com
Fix commit: 16ae6aa1 tcp: ignore Fast Open on repair mode
First crash: 934d, last: 880d

Cause bisection: introduced by (bisect log):

commit a0370b3f3f2cfb8b424b04c0545414abaa53f5ee
Author: Yuchung Cheng <ycheng@google.com>
Date: Fri Jan 13 06:11:36 2017 +0000

  tcp: enable RACK loss detection to trigger recovery

Crash: WARNING in corrupted (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log):

commit e523a2562a4457d9aae9b657125d193218631681
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri May 4 04:57:03 2018 +0000

  Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
upstream WARNING in tcp_enter_loss 1 1028d 1023d 0/17 closed as invalid on 2018/02/13 19:39
android-49 WARNING in tcp_enter_loss C 4 885d 532d 0/3 public: reported C repro on 2019/04/14 00:00

Sample crash report:

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-root 2018/04/27 12:15 upstream 0644f186 73417389 .config log report syz C davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-kmsan-gce 2018/05/01 03:04 https://github.com/google/kmsan.git master d2d741e5 d5b114b4 .config log report syz C davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-kasan-gce-386 2018/05/01 18:25 upstream fff75eb2 d5b114b4 .config log report syz davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org
ci-upstream-net-kasan-gce 2018/03/08 13:06 net-next a366e300 acd0caa5 .config log report davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org