From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christian Brauner <christian.brauner@ubuntu.com>
Subject: Re: KASAN: slab-out-of-bounds Read in bitmap_ip_ext_cleanup
Date: Mon, 20 Jan 2020 14:19:31 +0100
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To: syzbot <syzbot+6491ea8f6dddbf04930e@syzkaller.appspotmail.com>
Cc: a@unstable.cc, akpm@linux-foundation.org, allison@lohutok.net, arnd@arndb.de, axboe@kernel.dk, b.a.t.m.a.n@lists.open-mesh.org, bp@alien8.de, catalin.marinas@arm.com, chris@zankel.net, christian@brauner.io, coreteam@netfilter.org, davem@davemloft.net, elena.reshetova@intel.com, florent.fourcot@wifirst.fr, fw@strlen.de, geert@linux-m68k.org, hare@suse.com, heiko.carstens@de.ibm.com, hpa@zytor.com, info@metux.net, jcmvbkbc@gmail.com, jeremy@azazel.net, johannes.berg@intel.com, kadlec@netfilter.org, linux-api@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux@armlinux.org.uk, mareklindner@neomailbox.ch, mingo@redhat.com, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, peterz@infradead.
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On Sun, Jan 19, 2020 at 05:35:01PM -0800, syzbot wrote:
> syzbot has bisected this bug to:
> 
> commit d68dbb0c9ac8b1ff52eb09aa58ce6358400fa939
> Author: Christian Brauner <christian@brauner.io>
> Date:   Thu Jun 20 23:26:35 2019 +0000
> 
>     arch: handle arches who do not yet define clone3
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1456fed1e00000
> start commit:   09d4f10a net: sched: act_ctinfo: fix memory leak
> git tree:       net
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=1656fed1e00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1256fed1e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7e89bd00623fe71e
> dashboard link: https://syzkaller.appspot.com/bug?extid=6491ea8f6dddbf04930e
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=141af959e00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1067fa85e00000
> 
> Reported-by: syzbot+6491ea8f6dddbf04930e@syzkaller.appspotmail.com
> Fixes: d68dbb0c9ac8 ("arch: handle arches who do not yet define clone3")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

This bisect seems bogus.

Christian