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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2019-07-29 11:36:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 19:53:09 +0300 |
| commit | 59a8932a1fb63abb00a9e2cb6781d031d45b7c99 (patch) | |
| tree | 4a295f0b9f731a92cc2e1acc957fe99cbe18c2b0 /drivers | |
| parent | 96aed711d302f50162c4a25762e2fde6bf189396 (diff) | |
| download | linux-59a8932a1fb63abb00a9e2cb6781d031d45b7c99.tar.xz | |
gpu: drm: radeon: Fix a possible null-pointer dereference in radeon_connector_set_property()
[ Upstream commit f3eb9b8f67bc28783eddc142ad805ebdc53d6339 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 c5e1aa5f1d8e..efa875120071 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -764,7 +764,7 @@ 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; const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc); |