Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: swiotlb: Preserve allocation virtual address for dynamic pools swiotlb_alloc_tlb() can allocate from the DMA atomic pool when a decrypted pool is needed from atomic context. With CONFIG_DMA_DIRECT_REMAP, the atomic pool is backed by remapped virtual addresses, which are not the same as the direct-map addresses returned by phys_to_virt(). swiotlb_init_io_tlb_pool() currently reconstructs the pool virtual address from the physical start address. For atomic-pool backed allocations this stores the wrong address in pool->vaddr. Later, swiotlb_free_tlb() passes that address to dma_free_from_pool(), which will fail to recognize the chunk Pass the virtual address returned by the allocation path into swiotlb_init_io_tlb_pool(), and store that address in pool->vaddr. This keeps the pool free path using the same virtual address as the allocator.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 79636caad3618e2b38457f6e298c9b31ba82b489 before 68bf3ebd8e7020dae58e8aa14c7d482738bff9a8; affected 79636caad3618e2b38457f6e298c9b31ba82b489 before 45507dcb0847e96add4455274b12df0eca6590b4; affected 79636caad3618e2b38457f6e298c9b31ba82b489 before 35e0103177826430b5df888b1506239d41e76ab5; affected 79636caad3618e2b38457f6e298c9b31ba82b489 before c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319; affected 79636caad3618e2b38457f6e298c9b31ba82b489 before 57d29044d0f29a76c6ec0c112c8c7371d5608dc7 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/68bf3ebd8e7020dae58e8aa14c7d482738bff9a8
- https://git.kernel.org/stable/c/45507dcb0847e96add4455274b12df0eca6590b4
- https://git.kernel.org/stable/c/35e0103177826430b5df888b1506239d41e76ab5
- https://git.kernel.org/stable/c/c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319
- https://git.kernel.org/stable/c/57d29044d0f29a76c6ec0c112c8c7371d5608dc7