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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 <errno.h> | 5 #include <errno.h> |
6 #include <fcntl.h> | 6 #include <fcntl.h> |
7 #include <sys/ptrace.h> | 7 #include <sys/ptrace.h> |
8 #include <sys/stat.h> | 8 #include <sys/stat.h> |
9 #include <sys/types.h> | 9 #include <sys/types.h> |
10 #include <unistd.h> | 10 #include <unistd.h> |
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23 | 23 |
24 namespace { | 24 namespace { |
25 | 25 |
26 bool HasLinux32Bug() { | 26 bool HasLinux32Bug() { |
27 #if defined(__i386__) | 27 #if defined(__i386__) |
28 // On 3.2 kernels, yama doesn't work for 32-bit binaries on 64-bit kernels. | 28 // On 3.2 kernels, yama doesn't work for 32-bit binaries on 64-bit kernels. |
29 // This is fixed in 3.4. | 29 // This is fixed in 3.4. |
30 bool is_kernel_64bit = | 30 bool is_kernel_64bit = |
31 base::SysInfo::OperatingSystemArchitecture() == "x86_64"; | 31 base::SysInfo::OperatingSystemArchitecture() == "x86_64"; |
32 bool is_linux = base::SysInfo::OperatingSystemName() == "Linux"; | 32 bool is_linux = base::SysInfo::OperatingSystemName() == "Linux"; |
33 bool is_3_dot_2 = StartsWithASCII( | 33 bool is_3_dot_2 = base::StartsWithASCII( |
34 base::SysInfo::OperatingSystemVersion(), "3.2", /*case_sensitive=*/false); | 34 base::SysInfo::OperatingSystemVersion(), "3.2", /*case_sensitive=*/false); |
35 if (is_kernel_64bit && is_linux && is_3_dot_2) | 35 if (is_kernel_64bit && is_linux && is_3_dot_2) |
36 return true; | 36 return true; |
37 #endif // defined(__i386__) | 37 #endif // defined(__i386__) |
38 return false; | 38 return false; |
39 } | 39 } |
40 | 40 |
41 bool CanPtrace(pid_t pid) { | 41 bool CanPtrace(pid_t pid) { |
42 int ret; | 42 int ret; |
43 ret = ptrace(PTRACE_ATTACH, pid, NULL, NULL); | 43 ret = ptrace(PTRACE_ATTACH, pid, NULL, NULL); |
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163 if (Yama::IsEnforcing()) { | 163 if (Yama::IsEnforcing()) { |
164 // Check that process1 is protected by Yama, even though it has | 164 // Check that process1 is protected by Yama, even though it has |
165 // been created from a process that disabled Yama. | 165 // been created from a process that disabled Yama. |
166 CHECK(!CanSubProcessPtrace(process1.GetPid())); | 166 CHECK(!CanSubProcessPtrace(process1.GetPid())); |
167 } | 167 } |
168 } | 168 } |
169 | 169 |
170 } // namespace | 170 } // namespace |
171 | 171 |
172 } // namespace sandbox | 172 } // namespace sandbox |
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