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| author | Gustavo A. R. Silva | 2018-02-02 13:42:33 +0100 |
|---|---|---|
| committer | Rob Clark | 2018-03-19 11:33:34 +0100 |
| commit | 52749d601a6055da3352842575408fcba6f1da46 (patch) | |
| tree | 883b3ead98a4bae0e37c2b1b3ade00d17cb95d2a /drivers/gpu/drm/msm/dsi | |
| parent | drm/msm/adreno/a5xx_debugfs: fix potential NULL pointer dereference (diff) | |
| download | kernel-qcow2-linux-52749d601a6055da3352842575408fcba6f1da46.tar.gz kernel-qcow2-linux-52749d601a6055da3352842575408fcba6f1da46.tar.xz kernel-qcow2-linux-52749d601a6055da3352842575408fcba6f1da46.zip | |
drm/msm/dsi: Fix potential NULL pointer dereference in msm_dsi_modeset_init
_dev_ is being dereferenced before it is null checked, hence there
is a potential null pointer dereference.
Fix this by moving the pointer dereference after _dev_ has been
null checked.
Fixes: d4e7f38d70ef ("drm/msm/dsi: check msm_dsi and dsi pointers before use")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/dsi')
| -rw-r--r-- | drivers/gpu/drm/msm/dsi/dsi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index ee7e090e27b4..b744bcc7d8ad 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -192,13 +192,14 @@ void __exit msm_dsi_unregister(void) int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, struct drm_encoder *encoder) { - struct msm_drm_private *priv = dev->dev_private; + struct msm_drm_private *priv; struct drm_bridge *ext_bridge; int ret; if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev)) return -EINVAL; + priv = dev->dev_private; msm_dsi->dev = dev; ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); |