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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2019-07-29 11:36:44 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-08-02 18:30:38 +0300 |
| commit | f3eb9b8f67bc28783eddc142ad805ebdc53d6339 (patch) | |
| tree | fa46fcc6ca7d572aef45d1443c4f8dceedfad5c6 /drivers/gpu/drm/radeon/radeon_connectors.c | |
| parent | e3bf125bdbb6efed2d650effbc3c13320602d64a (diff) | |
| download | linux-f3eb9b8f67bc28783eddc142ad805ebdc53d6339.tar.xz | |
gpu: drm: radeon: Fix a possible null-pointer dereference in radeon_connector_set_property()
In radeon_connector_set_property(), there is an if statement on line 743
to check whether connector->encoder is NULL:
if (connector->encoder)
When connector->encoder is NULL, it is used on line 755:
if (connector->encoder->crtc)
Thus, a possible null-pointer dereference may occur.
To fix this bug, connector->encoder is checked before being used.
This bug is found by a static analysis tool STCheck written by us.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_connectors.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_connectors.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index c60d1a44d22a..b684cd719612 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -752,7 +752,7 @@ static int radeon_connector_set_property(struct drm_connector *connector, struct radeon_encoder->output_csc = val; - if (connector->encoder->crtc) { + if (connector->encoder && connector->encoder->crtc) { struct drm_crtc *crtc = connector->encoder->crtc; struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc); |