| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <gtest/gtest.h> |
| #include <pthread.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/prctl.h> |
| |
| #include "private/ScopeGuard.h" |
| |
| extern "C" pid_t gettid(); |
| |
| static void ProcSelfReadlinkBody() { |
| char buf[100]; |
| char buf2[1024]; |
| int fd = open("/dev/null", O_RDWR | O_CLOEXEC); |
| ASSERT_NE(-1, fd); |
| snprintf(buf, sizeof(buf), "/proc/self/fd/%d", fd); |
| const char* ERRORMSG = "Please apply the following two kernel patches:\n" |
| "* https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=73af963f9f3036dffed55c3a2898598186db1045\n" |
| "* https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=96d0df79f2644fc823f26c06491e182d87a90c2a\n"; |
| ASSERT_NE(-1, readlink(buf, buf2, sizeof(buf2))) << ERRORMSG; |
| ASSERT_STREQ("/dev/null", buf2); |
| close(fd); |
| } |
| |
| static void* ProcSelfReadlink(void*) { |
| ProcSelfReadlinkBody(); |
| return NULL; |
| } |
| |
| TEST(bug_26110743, ProcSelfReadlink) { |
| pthread_t t; |
| ASSERT_EQ(0, pthread_create(&t, NULL, ProcSelfReadlink, NULL)); |
| void* result; |
| ASSERT_EQ(0, pthread_join(t, &result)); |
| ASSERT_EQ(NULL, result); |
| } |
| |
| TEST(bug_26110743, ProcSelfReadlink_NotDumpable) { |
| int dumpable = prctl(PR_GET_DUMPABLE, 0, 0, 0, 0); |
| prctl(PR_SET_DUMPABLE, 0, 0, 0, 0); |
| auto guard = make_scope_guard([&]() { |
| // restore dumpable |
| prctl(PR_SET_DUMPABLE, dumpable, 0, 0, 0); |
| }); |
| |
| pthread_t t; |
| ASSERT_EQ(0, pthread_create(&t, NULL, ProcSelfReadlink, NULL)); |
| void* result; |
| ASSERT_EQ(0, pthread_join(t, &result)); |
| ASSERT_EQ(NULL, result); |
| } |
| |
| static void ProcTaskFdReadlinkBody() { |
| char buf[200]; |
| char buf2[1024]; |
| int fd = open("/dev/null", O_RDWR | O_CLOEXEC); |
| ASSERT_NE(-1, fd); |
| pid_t mypid = getpid(); |
| pid_t mytid = gettid(); |
| ASSERT_NE(mypid, mytid); |
| snprintf(buf, sizeof(buf), "/proc/%d/task/%d/fd/%d", mypid, mytid, fd); |
| const char* ERRORMSG = "Please apply the following kernel patch:\n" |
| "* https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54708d2858e79a2bdda10bf8a20c80eb96c20613\n"; |
| ASSERT_NE(-1, readlink(buf, buf2, sizeof(buf2))) << ERRORMSG; |
| ASSERT_STREQ("/dev/null", buf2); |
| close(fd); |
| } |
| |
| static void* ProcTaskFdReadlink(void*) { |
| ProcTaskFdReadlinkBody(); |
| return NULL; |
| } |
| |
| TEST(bug_26110743, ProcTaskFdReadlink) { |
| pthread_t t; |
| ASSERT_EQ(0, pthread_create(&t, NULL, ProcTaskFdReadlink, NULL)); |
| void* result; |
| ASSERT_EQ(0, pthread_join(t, &result)); |
| ASSERT_EQ(NULL, result); |
| } |
| |
| TEST(bug_26110743, ProcTaskFdReadlink_NotDumpable) { |
| int dumpable = prctl(PR_GET_DUMPABLE, 0, 0, 0, 0); |
| prctl(PR_SET_DUMPABLE, 0, 0, 0, 0); |
| auto guard = make_scope_guard([&]() { |
| // restore dumpable |
| prctl(PR_SET_DUMPABLE, dumpable, 0, 0, 0); |
| }); |
| |
| pthread_t t; |
| ASSERT_EQ(0, pthread_create(&t, NULL, ProcTaskFdReadlink, NULL)); |
| void* result; |
| ASSERT_EQ(0, pthread_join(t, &result)); |
| ASSERT_EQ(NULL, result); |
| } |