In the Linux kernel, the following vulnerability has been resolved: drm/tests: shmem: Hold reservation lock around purge Acquire and release the GEM object's reservation lock around calls to the object's purge operation. The tests use drmgemshmempurgelocked(), which led to errors such as show below. [ 58.709128] WARNING: CPU: 1 PID: 1354 at drivers/gpu/drm/drmgemshmemhelper.c:515 drmgemshmempurgelocked+0x51c/0x740 Only export the new helper drmgemshmempurge() for Kunit tests. This is not an interface for regular drivers.