The "num_syncobj_handles" is a u32 value that comes from the user via the
ioctl. On 32bit systems the "sizeof(uint32_t) * num_syncobj_handles"
multiplication can have an integer overflow. Use size_mul() to fix that.
Fixes: 38c67ec9aa4b ("drm/amdgpu: Add input fence to sync bo map/unmap")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 2c68118fe9fd..0ecc88df7208 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -58,7 +58,7 @@ amdgpu_gem_add_input_fence(struct drm_file *filp,
return 0;
syncobj_handles = memdup_user(u64_to_user_ptr(syncobj_handles_array),
- sizeof(uint32_t) * num_syncobj_handles);
+ size_mul(sizeof(uint32_t), num_syncobj_handles));
if (IS_ERR(syncobj_handles))
return PTR_ERR(syncobj_handles);
--
2.47.2
