linux-kernel - Re: [EXT] [PATCH] atlantic: fix double-free in aq_ring_tx

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Message-ID: <eb7f2b27-4c8d-f935-18c3-3d70caa0c5c8@marvell.com>
Date:   Fri, 19 Nov 2021 08:39:50 +0100
From:   Igor Russkikh <irusskikh@...vell.com>
To:     Zekun Shen <bruceshenzk@...il.com>
CC:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <brendandg@....edu>
Subject: Re: [EXT] [PATCH] atlantic: fix double-free in aq_ring_tx_clean


> We found this bug while fuzzing the device driver. Using and freeing
> the dangling pointer buff->skb would cause use-after-free and
> double-free.
> 
> This bug is triggerable with compromised/malfunctioning devices. We
> found the bug with QEMU emulation and tested the patch by emulation.
> We did NOT test on a real device.
> 
> Attached is the bug report.
> 

Reviewed-by: Igor Russkikh <irusskikh@...vell.com>

Thank you for submitting this!

Igor