netdev - Re: [syzbot] KASAN: slab-out-of-bounds Read in copy

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Message-ID: <6c7e48b9-5204-352f-18e7-26b13d70f966@redhat.com>
Date:   Wed, 27 Oct 2021 09:08:04 +0200
From:   Laurent Vivier <lvivier@...hat.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        syzbot <syzbot+b86736b5935e0d25b446@...kaller.appspotmail.com>,
        davem@...emloft.net, herbert@...dor.apana.org.au, jiri@...dia.com,
        kuba@...nel.org, leonro@...dia.com, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, mpm@...enic.com, mst@...hat.com,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KASAN: slab-out-of-bounds Read in copy_data

On 27/10/2021 00:34, Eric Dumazet wrote:
> 
> 
> On 10/26/21 9:39 AM, syzbot wrote:
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    9ae1fbdeabd3 Add linux-next specific files for 20211025
>> git tree:       linux-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1331363cb00000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=aeb17e42bc109064
>> dashboard link: https://syzkaller.appspot.com/bug?extid=b86736b5935e0d25b446
>> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=116ce954b00000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=132fcf62b00000
>>
>> The issue was bisected to:
>>
>> commit 22849b5ea5952d853547cc5e0651f34a246b2a4f
>> Author: Leon Romanovsky <leonro@...dia.com>
>> Date:   Thu Oct 21 14:16:14 2021 +0000
>>
>>      devlink: Remove not-executed trap policer notifications
> 
> More likely this came with
> 
> caaf2874ba27b92bca6f0298bf88bad94067ec37 hwrng: virtio - don't waste entropy
> 

I'm going to have a look.

Thanks,
Laurent