CVE-2025-71301 PUBLISHED

drm/tests: shmem: Hold reservation lock around vmap/vunmap

Assigner: Linux
Reserved: 08.05.2026 Published: 08.05.2026 Updated: 08.05.2026

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

drm/tests: shmem: Hold reservation lock around vmap/vunmap

Acquire and release the GEM object's reservation lock around vmap and vunmap operations. The tests use vmap_locked, which led to errors such as show below.

[ 122.292030] WARNING: CPU: 3 PID: 1413 at drivers/gpu/drm/drm_gem_shmem_helper.c:390 drm_gem_shmem_vmap_locked+0x3a3/0x6f0

[ 122.468066] WARNING: CPU: 3 PID: 1413 at drivers/gpu/drm/drm_gem_shmem_helper.c:293 drm_gem_shmem_pin_locked+0x1fe/0x350

[ 122.563504] WARNING: CPU: 3 PID: 1413 at drivers/gpu/drm/drm_gem_shmem_helper.c:234 drm_gem_shmem_get_pages_locked+0x23c/0x370

[ 122.662248] WARNING: CPU: 2 PID: 1413 at drivers/gpu/drm/drm_gem_shmem_helper.c:452 drm_gem_shmem_vunmap_locked+0x101/0x330

Only export the new vmap/vunmap helpers for Kunit tests. These are not interfaces for regular drivers.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 954907f7147dc43e0d1cd4d430c21d143d5fdf55 to 6b953d92f2f29e74b125617c6f00300fa1bed97e (excl.)
  • affected from 954907f7147dc43e0d1cd4d430c21d143d5fdf55 to e7b7022f11d3cf281c726117478696b83681bf11 (excl.)
  • affected from 954907f7147dc43e0d1cd4d430c21d143d5fdf55 to cda83b099f117f2a28a77bf467af934cb39e49cf (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.16 is affected
  • unaffected from 0 to 6.16 (excl.)
  • unaffected from 6.18.16 to 6.18.* (incl.)
  • unaffected from 6.19.6 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References