In the Linux kernel, the following vulnerability has been resolved: drm/imagination: take paired job reference For paired jobs, have the fragment job take a reference on the geometry job, so that the geometry job cannot be freed until the fragment job has finished with it. The geometry job structure is accessed when the fragment job is being prepared by the GPU scheduler. Taking the reference prevents the geometry job being freed until the fragment job no longer requires it. Fixes a use after free bug detected by KASAN: [ 124.256386] BUG: KASAN: slab-use-after-free in pvr_queue_prepare_job+0x108/0x868 [powervr] [ 124.264893] Read of size 1 at addr ffff0000084cb960 by task kworker/u16:4/63
https://git.kernel.org/stable/c/c90b95e12eb88d23740e5ea2c43d71675d17ac8d
https://git.kernel.org/stable/c/b5a6f97a78e2fc008fd6503b7040cb7e1120b873
https://git.kernel.org/stable/c/4ba2abe154ef68f9612eee9d6fbfe53a1736b064