diff options
| author | shanzhulig <shanzhulig@gmail.com> | 2023-06-27 18:10:47 -0700 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-06-30 13:12:16 -0400 |
| commit | 2e54154b9f27262efd0cb4f903cc7d5ad1fe9628 (patch) | |
| tree | f5437b73169a7273988e8a834b5ec41576b279df /drivers/gpu | |
| parent | b75efe88b20c2be28b67e2821a794cc183e32374 (diff) | |
drm/amdgpu: Fix potential fence use-after-free v2
fence Decrements the reference count before exiting.
Avoid Race Vulnerabilities for fence use-after-free.
v2 (chk): actually fix the use after free and not just move it.
Signed-off-by: shanzhulig <shanzhulig@gmail.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index b34f9f8d33d2..040f4cb6ab2d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1654,15 +1654,15 @@ static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev, continue; r = dma_fence_wait_timeout(fence, true, timeout); + if (r > 0 && fence->error) + r = fence->error; + dma_fence_put(fence); if (r < 0) return r; if (r == 0) break; - - if (fence->error) - return fence->error; } memset(wait, 0, sizeof(*wait)); |