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authorJia-Ju Bai <baijiaju1990@gmail.com>2019-07-29 11:36:44 +0300
committerAlex Deucher <alexander.deucher@amd.com>2019-08-02 18:30:38 +0300
commitf3eb9b8f67bc28783eddc142ad805ebdc53d6339 (patch)
treefa46fcc6ca7d572aef45d1443c4f8dceedfad5c6 /drivers
parente3bf125bdbb6efed2d650effbc3c13320602d64a (diff)
downloadlinux-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')
-rw-r--r--drivers/gpu/drm/radeon/radeon_connectors.c2
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);