From: Natalia Petrova n.petrova@fintech.ru
[ 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@fintech.ru Reviewed-by: Lyude Paul lyude@redhat.com [Fixed patch title] Signed-off-by: Lyude Paul lyude@redhat.com Link: https://patchwork.freedesktop.org/patch/msgid/20230512103320.82234-1-n.petro... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/nouveau/nouveau_connector.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 7478f2a1411e6..b8884272d65e0 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -726,7 +726,8 @@ 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; }