Out-of-Bounds Affecting kernel-debug package, versions *

Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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

drm/nouveau: fix several DMA buffer leaks

Nouveau manages GSP-RM DMA buffers with nvkm_gsp_mem objects. Several of these buffers are never dealloced. Some of them can be deallocated right after GSP-RM is initialized, but the rest need to stay until the driver unloads.

Also futher bullet-proof these objects by poisoning the buffer and clearing the nvkm_gsp_mem object when it is deallocated. Poisoning the buffer should trigger an error (or crash) from GSP-RM if it tries to access the buffer after we've deallocated it, because we were wrong about when it is safe to deallocate.

Finally, change the mem->size field to a size_t because that's the same type that dma_alloc_coherent expects.

• https://access.redhat.com/security/cve/CVE-2024-26912
• https://git.kernel.org/stable/c/042b5f83841fbf7ce39474412db3b5e4765a7ea7
• https://git.kernel.org/stable/c/6190d4c08897d748dd25f0b78267a90aa1694e15