netdev - Re: KASAN: slab-out-of-bounds Read in bitmap_ip_ext

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Message-ID: <20200120131930.pbhbsrm4bk4lq3d7@wittgenstein>
Date:   Mon, 20 Jan 2020 14:19:31 +0100
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     syzbot <syzbot+6491ea8f6dddbf04930e@...kaller.appspotmail.com>
Cc:     a@...table.cc, akpm@...ux-foundation.org, allison@...utok.net,
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Subject: Re: KASAN: slab-out-of-bounds Read in bitmap_ip_ext_cleanup

On Sun, Jan 19, 2020 at 05:35:01PM -0800, syzbot wrote:
> syzbot has bisected this bug to:
> 
> commit d68dbb0c9ac8b1ff52eb09aa58ce6358400fa939
> Author: Christian Brauner <christian@...uner.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@...kaller.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