GPUSWERRATA-1564 and GPUSWERRATA-1527 GPUSWERRATA-1564: Freed imported user memory can be accessed via vmap GPUSWERRATA-1527: Userspace can trigger a data abort by using protected memory for kmap/kbase_vmap(), which can lead to DoS Change-Id: I326d1a25cbbfb2574c48a6328ba5b0549bc14100 Provenance: https://code.ipdelivery.arm.com/c/GPU/mali-ddk/+/4939 Bug: 270579983 Signed-off-by: Guus Sliepen <[email protected]>