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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2019-07-29 16:36:44 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 18:54:59 +0200 |
| commit | 1e662250f4db74614ec28f1080bec3d04f3a4be1 (patch) | |
| tree | 57abff1ca7be92d1ae6b73de8955b0743be93b3b /drivers/gpu/drm | |
| parent | 09a0e83e032672d80dfc7ade5759712342cc4b63 (diff) | |
| download | linux-stable-1e662250f4db74614ec28f1080bec3d04f3a4be1.tar.gz linux-stable-1e662250f4db74614ec28f1080bec3d04f3a4be1.tar.bz2 linux-stable-1e662250f4db74614ec28f1080bec3d04f3a4be1.zip | |
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/gpu/drm')
| -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 337d3a1c2a40..48f752cf7a92 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; struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc); |