From: Liviu Dudau <liviu.dudau@arm.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: David Airlie <airlied@linux.ie>,
kernel-janitors@vger.kernel.org, dri-devel@lists.freedesktop.org,
"James (Qian) Wang" <james.qian.wang@arm.com>
Subject: Re: [PATCH] drm/komeda: Potential error pointer dereference
Date: Fri, 03 May 2019 14:41:14 +0000 [thread overview]
Message-ID: <20190503144114.GF15144@e110455-lin.cambridge.arm.com> (raw)
In-Reply-To: <20190503122525.GA29695@mwanda>
On Fri, May 03, 2019 at 03:25:25PM +0300, Dan Carpenter wrote:
> We need to check whether drm_atomic_get_crtc_state() returns an error
> pointer before dereferencing "crtc_st".
>
> Fixes: 7d31b9e7a550 ("drm/komeda: Add komeda_plane/plane_helper_funcs")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
I'll pull this and send it as a fix after -rc1.
Best regards,
Liviu
> ---
> drivers/gpu/drm/arm/display/komeda/komeda_plane.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> index 07ed0cc1bc44..c7e5fc6e5500 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> @@ -64,7 +64,7 @@ komeda_plane_atomic_check(struct drm_plane *plane,
> return 0;
>
> crtc_st = drm_atomic_get_crtc_state(state->state, state->crtc);
> - if (!crtc_st->enable) {
> + if (IS_ERR(crtc_st) || !crtc_st->enable) {
> DRM_DEBUG_ATOMIC("Cannot update plane on a disabled CRTC.\n");
> return -EINVAL;
> }
> --
> 2.18.0
>
--
==========
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
next prev parent reply other threads:[~2019-05-03 14:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-03 12:25 [PATCH] drm/komeda: Potential error pointer dereference Dan Carpenter
2019-05-03 14:41 ` Liviu Dudau [this message]
2019-05-20 5:37 ` james qian wang (Arm Technology China)
2019-05-20 5:43 ` james qian wang (Arm Technology China)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190503144114.GF15144@e110455-lin.cambridge.arm.com \
--to=liviu.dudau@arm.com \
--cc=airlied@linux.ie \
--cc=dan.carpenter@oracle.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=james.qian.wang@arm.com \
--cc=kernel-janitors@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox