1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * SPDX-License-Identifier: GPL-2.0
4 *
5 * Legacy blkg rwstat helpers enabled by CONFIG_BLK_CGROUP_RWSTAT.
6 * Do not use in new code.
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 */
14
15 #include <cstdio>
16 #include <cstdint>
17 #include <unistd.h>
18 #include <fcntl.h>
19
20 namespace OHOS {
ForceShrinkAnonFuzzer(const uint8_t * data,size_t size)21 bool ForceShrinkAnonFuzzer(const uint8_t *data, size_t size)
22 {
23 const char *forceShrinkAnon = "/dev/memcg/memory.force_shrink_anon";
24 int fd = open(forceShrinkAnon, O_RDWR);
25 if (fd < 0) {
26 return false;
27 }
28
29 int ret = write(fd, data, size);
30 if (ret < 0) {
31 printf("%s write fail\n", forceShrinkAnon);
32 close(fd);
33 return false;
34 }
35
36 close(fd);
37 return true;
38 }
39 } // namespace OHOS
40
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)41 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
42 {
43 OHOS::ForceShrinkAnonFuzzer(data, size);
44 return 0;
45 }
46