Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set + MIGRATE_PFN_VALID unset) driver still allocates device pages. There is no dma map of src pages and migration. j is 0 and svm_migrate_copy_memory_gart() will return an uninitialized r. That can trigger out_free_vram_pages to drop all VRAM just set up. Initialize r and only call the last svm_migrate_copy_memory_gart if j > 0. Current code postponed the last page to the final copy. This patch flushes on the last page when reach to the end of current drm_buddy_block; avoids another svm_migrate_copy_memory_gart.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 before 6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2; affected 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 before bd1adb2e5101db649121b59e601c92773a302a70; affected 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 before ae806a95b28fcecb913430cfa45a252e91a945d6; affected 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 before 0a9a0e8a97da70a0336c9115178aaf1be29bcfb1; affected 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11 before 520e345ffe05aabef1db82beda4288afb1757ff2 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2
- https://git.kernel.org/stable/c/bd1adb2e5101db649121b59e601c92773a302a70
- https://git.kernel.org/stable/c/ae806a95b28fcecb913430cfa45a252e91a945d6
- https://git.kernel.org/stable/c/0a9a0e8a97da70a0336c9115178aaf1be29bcfb1
- https://git.kernel.org/stable/c/520e345ffe05aabef1db82beda4288afb1757ff2