linux-kernel - Re: KASAN: use-after-free Read in skb_release

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Message-ID: <20200331174116.GA1844017@kroah.com>
Date:   Tue, 31 Mar 2020 19:41:16 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     syzbot <syzbot+a66a7c2e996797bb4acb@...kaller.appspotmail.com>
Cc:     davem@...emloft.net, festevam@...il.com, grundler@...omium.org,
        hayeswang@...ltek.com, johan.hedberg@...il.com,
        kernel@...gutronix.de, linux-arm-kernel@...ts.infradead.org,
        linux-bluetooth@...r.kernel.org, linux-imx@....com,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        marcel@...tmann.org, nishadkamdar@...il.com, peter.chen@....com,
        pmalani@...omium.org, s.hauer@...gutronix.de, shawnguo@...nel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in skb_release_data (2)

On Tue, Mar 31, 2020 at 10:36:01AM -0700, syzbot wrote:
> syzbot suspects this bug was fixed by commit:
> 
> commit d9958306d4be14f4c7466242b38ed3893a7b1386
> Author: Nishad Kamdar <nishadkamdar@...il.com>
> Date:   Sun Mar 15 10:55:07 2020 +0000
> 
>     USB: chipidea: Use the correct style for SPDX License Identifier
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16d4940be00000
> start commit:   63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f
> dashboard link: https://syzkaller.appspot.com/bug?extid=a66a7c2e996797bb4acb
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13c25a81e00000
> 
> If the result looks correct, please mark the bug fixed by replying with:
> 
> #syz fix: USB: chipidea: Use the correct style for SPDX License Identifier

I really doubt a comment change fixed a syzbot bug :)