linux-kernel - Re: [PATCH][next] mailbox: PCC: check for negative count for parse failure checking

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Date:   Wed, 30 May 2018 22:21:19 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Jassi Brar <jassisinghbrar@...il.com>, Al Stone <ahs3@...hat.com>,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] mailbox: PCC: check for negative count for parse
 failure checking

On Wed, May 30, 2018 at 06:14:29PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The function acpi_table_parse_enties_array can potentially return a
> negative value if parsing fails. Currently the check on the return
> is not checking for errors, so fix this by adding a -ve check too.
> 

The impact is that kmallocs would immediately fail and give you a big
stack trace.

regards,
dan carpenter