From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <3LLokXgkbACsZfgRHSSLYHWWPK.NVVNSLbZLYJVUaLUa.JVT@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com> MIME-Version: 1.0 Date: Sun, 19 Jan 2020 12:21:00 -0800 In-Reply-To: <0000000000006d7b1e059c7db653@google.com> Message-ID: <000000000000cbfd34059c83e917@google.com> Subject: Re: KASAN: use-after-free Read in bitmap_ip_ext_cleanup From: syzbot Content-Type: text/plain; charset="UTF-8" List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, bridge@lists.linux-foundation.org, coreteam@netfilter.org, davem@davemloft.net, florent.fourcot@wifirst.fr, fw@strlen.de, jeremy@azazel.net, johannes.berg@intel.com, kadlec@netfilter.org, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, nikolay@cumulusnetworks.com, pablo@netfilter.org, roopa@cumulusnetworks.com, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com syzbot has bisected this bug to: commit 3d26eb8ad1e9b906433903ce05f775cf038e747f Author: Nikolay Aleksandrov Date: Tue Jul 2 12:00:20 2019 +0000 net: bridge: don't cache ether dest pointer on input bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17bb1cc9e00000 start commit: 9aaa2949 Merge branch '1GbE' of git://git.kernel.org/pub/s.. git tree: net-next final crash: https://syzkaller.appspot.com/x/report.txt?x=147b1cc9e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=107b1cc9e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=66d8660c57ff3c98 dashboard link: https://syzkaller.appspot.com/bug?extid=b554d01b6c7870b17da2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15db12a5e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15316faee00000 Reported-by: syzbot+b554d01b6c7870b17da2@syzkaller.appspotmail.com Fixes: 3d26eb8ad1e9 ("net: bridge: don't cache ether dest pointer on input") For information about bisection process see: https://goo.gl/tpsmEJ#bisection