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

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Date:   Mon, 25 Apr 2022 09:10:17 +0200
From:   "Juan A." Suárez <jasuarez@...lia.com>
To:     Colin Ian King <colin.i.king@...il.com>,
        Emma Anholt <emma@...olt.net>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Melissa Wen <mwen@...lia.com>,
        dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/v3d: Fix null pointer dereference of pointer perfmon

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>


	J.A.