linux-kernel - Re: [PATCH] drm/v3d: Fix null pointer dereference of pointer perfmon

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Message-ID: <20220426125749.5i5nbtlcvwvmhzfh@mail.igalia.com>
Date:   Tue, 26 Apr 2022 11:58:30 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     Juan A. Suárez <jasuarez@...lia.com>
Cc:     Colin Ian King <colin.i.king@...il.com>,
        Emma Anholt <emma@...olt.net>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/v3d: Fix null pointer dereference of pointer perfmon

On 04/25, Juan A. Suárez wrote:
> On Sun, 2022-04-24 at 19:35 +0100, Colin Ian King wrote:
> > In the unlikely event that pointer perfmon is null the WARN_ON return
> > path
> > occurs after the pointer has already been deferenced. Fix this by
> > only
> > dereferencing perfmon after it has been null checked.
> > 
> 
> Good catch!
> 
> Reviewed-by: Juan A. Suarez <jasuarez@...lia.com>

Applied to drm-misc-next.

Thanks,

Melissa
> 
> 
> 	J.A.
> 

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