CVE-2026-80728

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

Revert "drm/amdgpu: fix aperture mapping leak"

devres teardown is LIFO. The aperture devres node was registered after the DRM device node, so devres release all() unmaps the aperture before the DRM device release callback fires amdgpu device fini sw(). IP sw fini callbacks (e.g. vcn v4 0 sw fini) write to fw shared through a pointer derived from aper base kaddr, causing a kernel page fault on probe failure / rollback:

BUG: unable to handle page fault ... PMD 0 RIP: vcn v4 0 sw fini+0x7b/0x170 [amdgpu] Call Trace: amdgpu device fini sw amdgpu driver release kms devm drm dev init release devres release all

This reverts commit d871e99879cb5fd1fa798b006b4888887e63a17a.

(cherry picked from commit 336e0cd576817ac64a4b394ca2b3680029f3e37f)