Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11, < d5872c81c70163a3ba9eb4da9a94c92b03067576; >= 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11, < 6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2; >= 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11, < bd1adb2e5101db649121b59e601c92773a302a70; >= 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11, < ae806a95b28fcecb913430cfa45a252e91a945d6; >= 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11, < 0a9a0e8a97da70a0336c9115178aaf1be29bcfb1; >= 50ea50cf6f6d31d3235ad1853c5dbea766a3ed11, < 520e345ffe05aabef1db82beda4288afb1757ff2 |
| Linux | Linux | 5.14 |
References
- https://git.kernel.org/stable/c/0a9a0e8a97da70a0336c9115178aaf1be29bcfb1
- https://git.kernel.org/stable/c/520e345ffe05aabef1db82beda4288afb1757ff2
- https://git.kernel.org/stable/c/6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2
- https://git.kernel.org/stable/c/ae806a95b28fcecb913430cfa45a252e91a945d6
- https://git.kernel.org/stable/c/bd1adb2e5101db649121b59e601c92773a302a70
- https://git.kernel.org/stable/c/d5872c81c70163a3ba9eb4da9a94c92b03067576
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received