linux-kernel - Re: [PATCH] remoteproc: avoid array index out of bounds in debugfs file

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Date:   Tue, 29 Mar 2022 10:46:14 +0800
From:   Miles Chen <miles.chen@...iatek.com>
To:     <xiaobing.shi@...iatek.com>
CC:     <bjorn.andersson@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-remoteproc@...r.kernel.org>, <mathieu.poirier@...aro.org>,
        <matthias.bgg@...il.com>
Subject: Re: [PATCH] remoteproc: avoid array index out of bounds in debugfs file

Hi Xiaobing,

> There is a negative offset of an on-stack array that causes an out of
> bounds issue when someone called with a zero 'count' argument to
> syswrite().
> 
> 	buf[count - 1]
> 
> We should add an extra check in rproc_coredump_write() to prevent the
> access.
> 
> Signed-off-by: Xiaobing shi <xiaobing.shi@...iatek.com>

Thanks for the patch.
However, Alistair has fixed this issue:
https://lore.kernel.org/all/20220119232139.1125908-1-adelva@google.com/

Thanks,
Miles