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| author | Colin Ian King <colin.king@canonical.com> | 2021-09-29 15:18:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-20 12:45:05 +0300 |
| commit | 91a340768b012f5b910a203a805b97a345b3db37 (patch) | |
| tree | c45ef23e2136d3e755e4fa39d2b21f53ee3dd8ae | |
| parent | a7b45024f66f9ec769e8dbb1a51ae83cd05929c7 (diff) | |
| download | linux-91a340768b012f5b910a203a805b97a345b3db37.tar.xz | |
drm/msm: Fix null pointer dereference on pointer edp
commit 2133c4fc8e1348dcb752f267a143fe2254613b34 upstream.
The initialization of pointer dev dereferences pointer edp before
edp is null checked, so there is a potential null pointer deference
issue. Fix this by only dereferencing edp after edp has been null
checked.
Addresses-Coverity: ("Dereference before null check")
Fixes: ab5b0107ccf3 ("drm/msm: Initial add eDP support in msm drm driver (v5)")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210929121857.213922-1-colin.king@canonical.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/msm/edp/edp_ctrl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c b/drivers/gpu/drm/msm/edp/edp_ctrl.c index 0d9657cc70db..937b4abb1552 100644 --- a/drivers/gpu/drm/msm/edp/edp_ctrl.c +++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c @@ -1116,7 +1116,7 @@ void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on) int msm_edp_ctrl_init(struct msm_edp *edp) { struct edp_ctrl *ctrl = NULL; - struct device *dev = &edp->pdev->dev; + struct device *dev; int ret; if (!edp) { @@ -1124,6 +1124,7 @@ int msm_edp_ctrl_init(struct msm_edp *edp) return -EINVAL; } + dev = &edp->pdev->dev; ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); if (!ctrl) return -ENOMEM; |