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| author | Ma Ke <make24@iscas.ac.cn> | 2024-06-27 10:42:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-11 13:47:14 +0300 |
| commit | 1f32535238493008587a8c5cb17eb2ca097592ef (patch) | |
| tree | d9238cdde495278b4062d168a5a5b86bfbc09e4a | |
| parent | cbbe17a324437c0ff99881a3ee453da45b228a00 (diff) | |
| download | linux-1f32535238493008587a8c5cb17eb2ca097592ef.tar.xz | |
drm/nouveau: fix null pointer dereference in nouveau_connector_get_modes
commit 80bec6825b19d95ccdfd3393cf8ec15ff2a749b4 upstream.
In nouveau_connector_get_modes(), the return value of drm_mode_duplicate()
is assigned to mode, which will lead to a possible NULL pointer
dereference on failure of drm_mode_duplicate(). Add a check to avoid npd.
Cc: stable@vger.kernel.org
Fixes: 6ee738610f41 ("drm/nouveau: Add DRM driver for NVIDIA GPUs")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240627074204.3023776-1-make24@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_connector.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index d6dd79541f6a..bdf5262ebd35 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -980,6 +980,9 @@ nouveau_connector_get_modes(struct drm_connector *connector) struct drm_display_mode *mode; mode = drm_mode_duplicate(dev, nv_connector->native_mode); + if (!mode) + return 0; + drm_mode_probed_add(connector, mode); ret = 1; } |