mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

drm/amdgpu: Fix potential fence use-after-free v2 

[ Upstream commit 2e54154b9f ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
shanzhulig 2023-06-27 18:10:47 -07:00 committed by Greg Kroah-Hartman
parent 6eb77ac68f
commit f5db29ce25
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -1625,15 +1625,15 @@ 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));