Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix bo->pin leaking in amdgpu_bo_create_reserved amdgpu_bo_create_reserved() only allocates a new BO when *bo_ptr (struct amdgpu_bo **bo_ptr as input parameter) is NULL, it simply skips creation when *bo_ptr is non-NULL. But it unconditionally reserves, pins, gart allocates and maps the BO afterwards. When the same non-NULL BO pointer is passed in again, for example firmware buffers that live in adev and are re-loaded on every resume / cp_resume / start under AMDGPU_FW_LOAD_DIRECT, amdgpu_bo_pin() just increases pin_count unconditionally, however the matching teardown only unpins once, so pin_count never drops to zero, so TTM is not able to move, swap or evict a BO, causing BO leaks. This commit fixes this issue by only pinning the bo once at creation, and repeated calls no longer take additional pin references. (cherry picked from commit 3ddc0ae76202c447b6aec61e907b852bc94671cf)
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
53766e5adac75872e9d413cdbfd0e47ae40701f9 to < 7aea619d9f186dcf0f1289879e9edb69d2b56639affected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < b572d0814c1366701ca704286589fab025802566affected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < e06e0885725a16304b7723aeb478a78cca9dc96aaffected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < 51eeef1949c11d3dcb5f422a5d9b3f09ebe8a1bcaffected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < 2f390b4c83011452753fd84972f657d2b00a952baffected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < ba7b6444097a73ccd3d3ac9e2be4ebb73d226460affected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < 9743f60013273987abf415dc47474683d22aaee9affected53766e5adac75872e9d413cdbfd0e47ae40701f9 to < a2f895f3c852063258d62e9f74b081de07ca95dfaffected
Linux Linux
Default version status: affected
4.14affected0 to < 4.14unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/7aea619d9f186dcf0f1289879e9edb69d2b56639 ↗
- https://git.kernel.org/stable/c/b572d0814c1366701ca704286589fab025802566 ↗
- https://git.kernel.org/stable/c/e06e0885725a16304b7723aeb478a78cca9dc96a ↗
- https://git.kernel.org/stable/c/51eeef1949c11d3dcb5f422a5d9b3f09ebe8a1bc ↗
- https://git.kernel.org/stable/c/2f390b4c83011452753fd84972f657d2b00a952b ↗
- https://git.kernel.org/stable/c/ba7b6444097a73ccd3d3ac9e2be4ebb73d226460 ↗
- https://git.kernel.org/stable/c/9743f60013273987abf415dc47474683d22aaee9 ↗
- https://git.kernel.org/stable/c/a2f895f3c852063258d62e9f74b081de07ca95df ↗