diff options
| author | Ma Ke <make_ruc2021@163.com> | 2023-10-11 04:21:43 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-10-13 18:33:15 +0300 |
| commit | 2c1fe3c480f9e1deefd50d4b18be4a046011ee1f (patch) | |
| tree | d4da537da5f5e38853045ab9e6639c7624d5eb2c /drivers/gpu/drm/radeon | |
| parent | ffa88b0019c20d0bacda7cd1463af86ec744d52e (diff) | |
| download | linux-2c1fe3c480f9e1deefd50d4b18be4a046011ee1f.tar.xz | |
drm/radeon: fix a possible null pointer dereference
In radeon_tv_get_modes(), the return value of drm_cvt_mode()
is assigned to mode, which will lead to a NULL pointer
dereference on failure of drm_cvt_mode(). Add a check to
avoid null point dereference.
Signed-off-by: Ma Ke <make_ruc2021@163.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_connectors.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index d2f02c3dfce2..b84b58926106 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -1119,6 +1119,8 @@ static int radeon_tv_get_modes(struct drm_connector *connector) else { /* only 800x600 is supported right now on pre-avivo chips */ tv_mode = drm_cvt_mode(dev, 800, 600, 60, false, false, false); + if (!tv_mode) + return 0; tv_mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; drm_mode_probed_add(connector, tv_mode); } |