Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Do not reallocate GA log buffers on resume Commit c5e1a1eb9279 ("iommu/amd: Simplify and Consolidate Virtual APIC (AVIC) Enablement") moved the GA log allocation from iommu_init_pci() to enable_iommus_vapic(), which is called on every resume. iommu_init_ga_log() assigns iommu->ga_log and iommu->ga_log_tail unconditionally. Each resume therefore replaces the boot-time pointers and leaks both old allocations. The function also uses GFP_KERNEL from a syscore resume callback, where interrupts are disabled and the non-boot CPUs are offline. Return early if both buffers are already allocated. Clear the pointers in free_ga_log() so a partial allocation failure cannot leave ga_log dangling.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b before 8b95269d7a43b737c2c0e2fa77bf00cc8a3a4434; affected c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b before ff85cdc2889e1c885eed218ee5bc0b59e0235b3f; affected c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b before 94458b80d3b203c1c9e2c98aa7319b7713e006c0; affected c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b before b6be275d19cee01f8f1f08a2ff18337103d05d40; affected c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b before 00a7dd64888d6dd72110b40e2824a088cf7b7386 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8b95269d7a43b737c2c0e2fa77bf00cc8a3a4434
- https://git.kernel.org/stable/c/ff85cdc2889e1c885eed218ee5bc0b59e0235b3f
- https://git.kernel.org/stable/c/94458b80d3b203c1c9e2c98aa7319b7713e006c0
- https://git.kernel.org/stable/c/b6be275d19cee01f8f1f08a2ff18337103d05d40
- https://git.kernel.org/stable/c/00a7dd64888d6dd72110b40e2824a088cf7b7386