CVE-2023-52586

In the Linux kernel, the following vulnerability has been resolved:
drm/msm/dpu: Add mutex lock in control vblank irq Add a mutex lock to
control vblank irq to synchronize vblank enable/disable operations
happening from different threads to prevent race conditions while
registering/unregistering the vblank irq callback. v4: -Removed
vblank_ctl_lock from dpu_encoder_virt, so it is only a parameter of
dpu_encoder_phys. -Switch from atomic refcnt to a simple int counter as
mutex has now been added v3: Mistakenly did not change wording in last
version. It is done now. v2: Slightly changed wording of commit message
Patchwork: https://patchwork.freedesktop.org/patch/571854/