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disp: msm: sde: protect file private structure with mutex lock

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Access file private data structures inside the
mutex lock only to avoid use-after-free issues.

Change-Id: Ibae25aa31eeb7a7afada3dd0ecc236615223dfc9
Signed-off-by: srikanthreddy ponogoti <sponogot@codeaurora.org>
This commit is contained in:
srikanthreddy ponogoti 2021-10-20 16:41:38 +05:30 • committed by Gerrit - the friendly Code Review server
commit cd3a09b4df
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/msm/msm_drv.c
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@ -1421,7 +1421,7 @@ void msm_mode_object_event_notify(struct drm_mode_object *obj,
static int msm_release(struct inode *inode, struct file *filp)
{
struct drm_file *file_priv = filp->private_data;
struct drm_file *file_priv;
struct drm_minor *minor;
struct drm_device *dev;
struct msm_drm_private *priv;
@ -1433,6 +1433,7 @@ static int msm_release(struct inode *inode, struct file *filp)
mutex_lock(&msm_release_lock);
file_priv = filp->private_data;
if (!file_priv) {
ret = -EINVAL;
goto end;