Patch "drm/nouveau: add nv_encoder pointer check for NULL" has been added to the 5.15-stable tree

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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 5.15-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-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit eaabbbf1f7d4148f7036de4a4a453657abe1da23
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 f5c79d367f290..7f8607b97707e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -729,7 +729,8 @@ 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;
 }
 



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