linux-kernel - Re: [PATCH] arch: tile: fix null pointer dereference on pt

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Date:	Mon, 16 Mar 2015 16:15:50 -0400
From:	Chris Metcalf <cmetcalf@...hip.com>
To:	Colin King <colin.king@...onical.com>,
	Joe Perches <joe@...ches.com>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arch: tile: fix null pointer dereference on pt_regs pointer

On 3/1/2015 3:12 PM, Colin King wrote:
> From: Colin Ian King<colin.king@...onical.com>
>
> Cppcheck reports the following issue:
> [arch/tile/kernel/stack.c:116]: (error) Possible null
>    pointer dereference: p
>
> In this case, on reporting on an odd fault, p is set to NULL
> and immediately afterwords p is dereferenced iff
> !kbt->profile is false.  Rather than doing this check just
> return NULL rather than falling through to the potential
> null pointer dereference (since the original intentional
> outcome would be to return NULL anyhow) for this odd fault
> case.
>
> Signed-off-by: Colin Ian King<colin.king@...onical.com>
> ---
>   arch/tile/kernel/stack.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

Thanks!  I tweaked this a bit and took it into the tile tree.

-- 
Chris Metcalf, EZChip Semiconductor
http://www.ezchip.com

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