This is a note to let you know that I've just added the patch titled
drm/nouveau: add nv_encoder pointer check for NULL
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-nouveau-add-nv_encoder-pointer-check-for-null.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5d06b3dca71efae7082397676711792a1f03dbda
Author: Natalia Petrova <n.petrova@xxxxxxxxxx>
Date: Fri May 12 13:33:20 2023 +0300
drm/nouveau: add nv_encoder pointer check for NULL
[ Upstream commit 55b94bb8c42464bad3d2217f6874aa1a85664eac ]
Pointer nv_encoder could be dereferenced at nouveau_connector.c
in case it's equal to NULL by jumping to goto label.
This patch adds a NULL-check to avoid it.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 3195c5f9784a ("drm/nouveau: set encoder for lvds")
Signed-off-by: Natalia Petrova <n.petrova@xxxxxxxxxx>
Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
[Fixed patch title]
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230512103320.82234-1-n.petrova@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 048a04701910e..85a20fe2709af 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -730,7 +730,8 @@ nouveau_connector_detect_lvds(struct drm_connector *connector, bool force)
#endif
nouveau_connector_set_edid(nv_connector, edid);
- nouveau_connector_set_encoder(connector, nv_encoder);
+ if (nv_encoder)
+ nouveau_connector_set_encoder(connector, nv_encoder);
return status;
}
