linux-kernel - [PATCH 4.9 23/32] drm/bridge: vga-dac: Fix edid memory leak

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Date:   Tue,  8 May 2018 10:11:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Rob Herring <robh@...nel.org>,
        Sean Paul <seanpaul@...omium.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH 4.9 23/32] drm/bridge: vga-dac: Fix edid memory leak

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sean Paul <seanpaul@...omium.org>

commit 49ceda9de2da4d1827941d06701f3017c27c1855 upstream.

edid should be freed once it's finished being used.

Fixes: 56fe8b6f4991 ("drm/bridge: Add RGB to VGA bridge support")
Cc: Rob Herring <robh@...nel.org>
Cc: Sean Paul <seanpaul@...omium.org>
Cc: Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc: Archit Taneja <architt@...eaurora.org>
Cc: Andrzej Hajda <a.hajda@...sung.com>
Cc: Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Cc: <stable@...r.kernel.org> # v4.9+
Reviewed-by: Maxime Ripard <maxime.ripard@...tlin.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180420190007.1572-1-seanpaul@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/bridge/dumb-vga-dac.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/bridge/dumb-vga-dac.c
+++ b/drivers/gpu/drm/bridge/dumb-vga-dac.c
@@ -53,7 +53,9 @@ static int dumb_vga_get_modes(struct drm
 	}
 
 	drm_mode_connector_update_edid_property(connector, edid);
-	return drm_add_edid_modes(connector, edid);
+	ret = drm_add_edid_modes(connector, edid);
+	kfree(edid);
+	return ret;
 
 fallback:
 	/*