From: Dan Carpenter Date: Thu, 4 Sep 2025 18:58:49 +0000 (+0300) Subject: drm/amdgpu: Fix error codes if copy_to_user() fails X-Git-Tag: v6.18-rc1~134^2~13^2~1 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=64cc12f9798f146f2c616db4885d653741d3b3c1;p=thirdparty%2Flinux.git drm/amdgpu: Fix error codes if copy_to_user() fails 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") Reviewed-By: David Francis Signed-off-by: Dan Carpenter Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index 8bec41cdccd77..6301757467805 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -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);