linux-kernel - Re: [syzbot] WARNING: zero-size vmalloc in corrupted

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Message-ID: <20210623191928.69d279d1@gmail.com>
Date:   Wed, 23 Jun 2021 19:19:28 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     syzbot <syzbot+c2f6f09fe907a838effb@...kaller.appspotmail.com>
Cc:     akpm@...ux-foundation.org, coreteam@...filter.org,
        davem@...emloft.net, dsahern@...nel.org, fw@...len.de,
        kadlec@...filter.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, syzkaller-bugs@...glegroups.com,
        yoshfuji@...ux-ipv6.org
Subject: Re: [syzbot] WARNING: zero-size vmalloc in corrupted

On Wed, 23 Jun 2021 02:15:23 -0700
syzbot <syzbot+c2f6f09fe907a838effb@...kaller.appspotmail.com> wrote:

> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    13311e74 Linux 5.13-rc7
> git tree:       upstream
> console output:
> https://syzkaller.appspot.com/x/log.txt?x=15d01e58300000 kernel
> config:  https://syzkaller.appspot.com/x/.config?x=42ecca11b759d96c
> dashboard link:
> https://syzkaller.appspot.com/bug?extid=c2f6f09fe907a838effb syz
> repro:
> https://syzkaller.appspot.com/x/repro.syz?x=14bb89e8300000 C
> reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17cc51b8300000
> 
> The issue was bisected to:
> 
> commit f9006acc8dfe59e25aa75729728ac57a8d84fc32
> Author: Florian Westphal <fw@...len.de>
> Date:   Wed Apr 21 07:51:08 2021 +0000
> 
>     netfilter: arp_tables: pass table pointer via nf_hook_ops
> 
> bisection log:
> https://syzkaller.appspot.com/x/bisect.txt?x=13b88400300000 final
> oops:     https://syzkaller.appspot.com/x/report.txt?x=10788400300000
> console output:
> https://syzkaller.appspot.com/x/log.txt?x=17b88400300000
> 

This one is similar to previous zero-size vmalloc, I guess :)

#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master


With regards,
Pavel Skripkin

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