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drm/nouveau: add nv_encoder pointer check for NULL

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[ 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: 3195c5f978 ("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.petrova@fintech.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Natalia Petrova 2023-05-12 13:33:20 +03:00 committed by Greg Kroah-Hartman
parent fb725beca6
commit 62aecf23f3
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/nouveau/nouveau_connector.c
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@ -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;
}