diff options
| author | Dan Carpenter <[email protected]> | 2018-08-10 18:50:32 +0800 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2018-08-27 11:10:42 -0500 |
| commit | ff30e9e8509cb877dc7cbc776b36c70f5bdd290f (patch) | |
| tree | a890dbb842f5a75983309beac1dfc651309f6c03 | |
| parent | e51ee68ff2eef2a0117a26ec28d64f86081df4e8 (diff) | |
drm/amdgpu: fix integer overflow test in amdgpu_bo_list_create()
We accidentally left out the size of the amdgpu_bo_list struct. It
could lead to memory corruption on 32 bit systems. You'd have to
pick the absolute maximum and set "num_entries == 59652323" then size
would wrap to 16 bytes.
Fixes: 920990cb080a ("drm/amdgpu: allocate the bo_list array after the list")
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Huang Rui <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>
Signed-off-by: Huang Rui <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c index d472a2c8399f..b80243d3972e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c @@ -67,7 +67,8 @@ int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp, unsigned i; int r; - if (num_entries > SIZE_MAX / sizeof(struct amdgpu_bo_list_entry)) + if (num_entries > (SIZE_MAX - sizeof(struct amdgpu_bo_list)) + / sizeof(struct amdgpu_bo_list_entry)) return -EINVAL; size = sizeof(struct amdgpu_bo_list); |