linux-kernel - Re: [PATCH] media: videobuf2: Fix integer overrun in vb2

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Message-ID: <YEh5TmP/fbHeZc2G@google.com>
Date:   Wed, 10 Mar 2021 16:46:22 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Tomasz Figa <tfiga@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH] media: videobuf2: Fix integer overrun in vb2_mmap

On (21/03/10 08:40), Ricardo Ribalda wrote:
> 
> The plane_length is an unsigned integer. So, if we have a size of
> 0xffffffff bytes we incorrectly allocate 0 bytes instead of 1 << 32.
> 
> Suggested-by: Sergey Senozhatsky <senozhatsky@...omium.org>
> Cc: stable@...r.kernel.org
> Fixes: 7f8414594e47 ("[media] media: videobuf2: fix the length check for mmap")
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>


FWIF,
Reviewed-by: Sergey Senozhatsky <senozhatsky@...omium.org>