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drm/amdgpu: Fix error codes if copy_to_user() fails

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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: 4d82724f7f ("drm/amdgpu: Add mapping info option for GEM_OP ioctl")
Fixes: f9db1fc52c ("drm/amdgpu: Add ioctl to get all gem handles for a process")
Reviewed-By: David Francis <David.Francis@amd.com>
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dan Carpenter
2025-09-04 21:58:49 +03:00
committed by Alex Deucher
parent b7c5334af6
commit 64cc12f979
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
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@@ -1066,7 +1066,8 @@ 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;
@@ -1158,7 +1159,8 @@ 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);