linux-kernel - Re: KASAN: slab-out-of-bounds Read in br_mrp

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Message-ID: <20200521140803.GI30374@kadam>
Date:   Thu, 21 May 2020 17:08:03 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     syzbot <syzbot+9c6f0f1f8e32223df9a4@...kaller.appspotmail.com>
Cc:     bridge@...ts.linux-foundation.org, davem@...emloft.net,
        horatiu.vultur@...rochip.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        nikolay@...ulusnetworks.com, roopa@...ulusnetworks.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: slab-out-of-bounds Read in br_mrp_parse

On Wed, May 20, 2020 at 11:23:18AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    dda18a5c selftests/bpf: Convert bpf_iter_test_kern{3, 4}.c..
> git tree:       bpf-next
                  ^^^^^^^^

I can figure out what this is from reading Next/Trees but it would be
more useful if it were easier to script.

> console output: https://syzkaller.appspot.com/x/log.txt?x=10c4e63c100000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=668983fd3dd1087e
> dashboard link: https://syzkaller.appspot.com/bug?extid=9c6f0f1f8e32223df9a4
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17eaba3c100000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=128598f6100000
> 

regards,
dan carpenter