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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Tomi Valkeinen <tomi.valkeinen@ti.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: David Airlie <airlied@linux.ie>,
	kernel-janitors@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH] drm/omap: Use after free in omap_connector_destroy()
Date: Mon, 01 Oct 2018 16:45:05 +0000	[thread overview]
Message-ID: <20181001164505.GB29248@mwanda> (raw)

We can free "omap_connector" until the end of the function.

Fixes: 949ea2ef3fed ("drm/omap: Don't call HPD registration operations recursively")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index 98f5ca29444a..b81302c4bf9e 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -164,10 +164,11 @@ static void omap_connector_destroy(struct drm_connector *connector)
 
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
-	kfree(omap_connector);
 
 	omapdss_device_put(omap_connector->output);
 	omapdss_device_put(omap_connector->display);
+
+	kfree(omap_connector);
 }
 
 #define MAX_EDID  512

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Tomi Valkeinen <tomi.valkeinen@ti.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: David Airlie <airlied@linux.ie>,
	kernel-janitors@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH] drm/omap: Use after free in omap_connector_destroy()
Date: Mon, 1 Oct 2018 19:45:05 +0300	[thread overview]
Message-ID: <20181001164505.GB29248@mwanda> (raw)

We can free "omap_connector" until the end of the function.

Fixes: 949ea2ef3fed ("drm/omap: Don't call HPD registration operations recursively")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index 98f5ca29444a..b81302c4bf9e 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -164,10 +164,11 @@ static void omap_connector_destroy(struct drm_connector *connector)
 
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
-	kfree(omap_connector);
 
 	omapdss_device_put(omap_connector->output);
 	omapdss_device_put(omap_connector->display);
+
+	kfree(omap_connector);
 }
 
 #define MAX_EDID  512
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             reply	other threads:[~2018-10-01 16:45 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-01 16:45 Dan Carpenter [this message]
2018-10-01 16:45 ` [PATCH] drm/omap: Use after free in omap_connector_destroy() Dan Carpenter
2018-10-01 23:50 ` Laurent Pinchart
2018-10-01 23:50   ` Laurent Pinchart

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