CVE-2024-50174

In the Linux kernel, the following vulnerability has been resolved:

drm/panthor: Fix race when converting group handle to group object

XArray provides it's own internal lock which protects the internal array

when entries are being simultaneously added and removed. However there

is still a race between retrieving the pointer from the XArray and

incrementing the reference count.

To avoid this race simply hold the internal XArray lock when

incrementing the reference count, this ensures there cannot be a racing

call to xa_erase().