The copy_to_user() function returns the number of bytes that it wasn't
able to copy, but we should return -EFAULT to the user.
Fixes: 4d82724f7f2b ("drm/amdgpu: Add mapping info option for GEM_OP ioctl")
Fixes: f9db1fc52ceb ("drm/amdgpu: Add ioctl to get all gem handles for a
process")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 63eb75a579ce..2b58bc805374 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -1067,7 +1067,8 @@ int amdgpu_gem_op_ioctl(struct drm_device *dev, void
*data,
drm_exec_fini(&exec);
if (num_mappings > 0 && num_mappings <= args->num_entries)
- r = copy_to_user(u64_to_user_ptr(args->value),
vm_entries, num_mappings * sizeof(*vm_entries));
+ if (copy_to_user(u64_to_user_ptr(args->value),
vm_entries, num_mappings * sizeof(*vm_entries)))
+ r = -EFAULT;
args->num_entries = num_mappings;
@@ -1159,7 +1160,8 @@ int amdgpu_gem_list_handles_ioctl(struct drm_device *dev,
void *data,
args->num_entries = bo_index;
if (!ret)
- ret = copy_to_user(u64_to_user_ptr(args->entries), bo_entries,
num_bos * sizeof(*bo_entries));
+ if (copy_to_user(u64_to_user_ptr(args->entries), bo_entries,
num_bos * sizeof(*bo_entries)))
+ ret = -EFAULT;
kvfree(bo_entries);
--
2.47.2
