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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "sandbox/linux/services/credentials.h" | 5 #include "sandbox/linux/services/credentials.h" |
| 6 | 6 |
| 7 #include <errno.h> | 7 #include <errno.h> |
| 8 #include <fcntl.h> | 8 #include <fcntl.h> |
| 9 #include <stdio.h> | 9 #include <stdio.h> |
| 10 #include <sys/stat.h> | 10 #include <sys/stat.h> |
| (...skipping 112 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 123 } | 123 } |
| 124 | 124 |
| 125 // Test the WorkingDirectoryIsRoot() helper. | 125 // Test the WorkingDirectoryIsRoot() helper. |
| 126 TEST(Credentials, CanDetectRoot) { | 126 TEST(Credentials, CanDetectRoot) { |
| 127 ASSERT_EQ(0, chdir("/proc/")); | 127 ASSERT_EQ(0, chdir("/proc/")); |
| 128 ASSERT_FALSE(WorkingDirectoryIsRoot()); | 128 ASSERT_FALSE(WorkingDirectoryIsRoot()); |
| 129 ASSERT_EQ(0, chdir("/")); | 129 ASSERT_EQ(0, chdir("/")); |
| 130 ASSERT_TRUE(WorkingDirectoryIsRoot()); | 130 ASSERT_TRUE(WorkingDirectoryIsRoot()); |
| 131 } | 131 } |
| 132 | 132 |
| 133 SANDBOX_TEST(Credentials, DISABLE_ON_LSAN(DropFileSystemAccessIsSafe)) { | 133 // Disabled on ASAN because of crbug.com/451603. |
| 134 SANDBOX_TEST(Credentials, DISABLE_ON_ASAN(DropFileSystemAccessIsSafe)) { |
| 134 CHECK(Credentials::DropAllCapabilities()); | 135 CHECK(Credentials::DropAllCapabilities()); |
| 135 // Probably missing kernel support. | 136 // Probably missing kernel support. |
| 136 if (!Credentials::MoveToNewUserNS()) return; | 137 if (!Credentials::MoveToNewUserNS()) return; |
| 137 CHECK(Credentials::DropFileSystemAccess()); | 138 CHECK(Credentials::DropFileSystemAccess()); |
| 138 CHECK(!base::DirectoryExists(base::FilePath("/proc"))); | 139 CHECK(!base::DirectoryExists(base::FilePath("/proc"))); |
| 139 CHECK(WorkingDirectoryIsRoot()); | 140 CHECK(WorkingDirectoryIsRoot()); |
| 140 CHECK(base::IsDirectoryEmpty(base::FilePath("/"))); | 141 CHECK(base::IsDirectoryEmpty(base::FilePath("/"))); |
| 141 // We want the chroot to never have a subdirectory. A subdirectory | 142 // We want the chroot to never have a subdirectory. A subdirectory |
| 142 // could allow a chroot escape. | 143 // could allow a chroot escape. |
| 143 CHECK_NE(0, mkdir("/test", 0700)); | 144 CHECK_NE(0, mkdir("/test", 0700)); |
| 144 } | 145 } |
| 145 | 146 |
| 146 // Check that after dropping filesystem access and dropping privileges | 147 // Check that after dropping filesystem access and dropping privileges |
| 147 // it is not possible to regain capabilities. | 148 // it is not possible to regain capabilities. |
| 148 SANDBOX_TEST(Credentials, DISABLE_ON_LSAN(CannotRegainPrivileges)) { | 149 SANDBOX_TEST(Credentials, DISABLE_ON_ASAN(CannotRegainPrivileges)) { |
| 149 CHECK(Credentials::DropAllCapabilities()); | 150 CHECK(Credentials::DropAllCapabilities()); |
| 150 // Probably missing kernel support. | 151 // Probably missing kernel support. |
| 151 if (!Credentials::MoveToNewUserNS()) return; | 152 if (!Credentials::MoveToNewUserNS()) return; |
| 152 CHECK(Credentials::DropFileSystemAccess()); | 153 CHECK(Credentials::DropFileSystemAccess()); |
| 153 CHECK(Credentials::DropAllCapabilities()); | 154 CHECK(Credentials::DropAllCapabilities()); |
| 154 | 155 |
| 155 // The kernel should now prevent us from regaining capabilities because we | 156 // The kernel should now prevent us from regaining capabilities because we |
| 156 // are in a chroot. | 157 // are in a chroot. |
| 157 CHECK(!Credentials::CanCreateProcessInNewUserNS()); | 158 CHECK(!Credentials::CanCreateProcessInNewUserNS()); |
| 158 CHECK(!Credentials::MoveToNewUserNS()); | 159 CHECK(!Credentials::MoveToNewUserNS()); |
| 159 } | 160 } |
| 160 | 161 |
| 161 } // namespace. | 162 } // namespace. |
| 162 | 163 |
| 163 } // namespace sandbox. | 164 } // namespace sandbox. |
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