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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 "content/zygote/zygote_main.h" | 5 #include "content/zygote/zygote_main.h" |
6 | 6 |
7 #include <dlfcn.h> | 7 #include <dlfcn.h> |
8 #include <fcntl.h> | 8 #include <fcntl.h> |
9 #include <pthread.h> | 9 #include <pthread.h> |
10 #include <signal.h> | 10 #include <signal.h> |
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33 #include "content/common/font_config_ipc_linux.h" | 33 #include "content/common/font_config_ipc_linux.h" |
34 #include "content/common/sandbox_linux/sandbox_debug_handling_linux.h" | 34 #include "content/common/sandbox_linux/sandbox_debug_handling_linux.h" |
35 #include "content/common/sandbox_linux/sandbox_linux.h" | 35 #include "content/common/sandbox_linux/sandbox_linux.h" |
36 #include "content/common/zygote_commands_linux.h" | 36 #include "content/common/zygote_commands_linux.h" |
37 #include "content/public/common/content_switches.h" | 37 #include "content/public/common/content_switches.h" |
38 #include "content/public/common/main_function_params.h" | 38 #include "content/public/common/main_function_params.h" |
39 #include "content/public/common/sandbox_linux.h" | 39 #include "content/public/common/sandbox_linux.h" |
40 #include "content/public/common/zygote_fork_delegate_linux.h" | 40 #include "content/public/common/zygote_fork_delegate_linux.h" |
41 #include "content/zygote/zygote_linux.h" | 41 #include "content/zygote/zygote_linux.h" |
42 #include "crypto/nss_util.h" | 42 #include "crypto/nss_util.h" |
43 #include "sandbox/linux/services/credentials.h" | |
44 #include "sandbox/linux/services/init_process_reaper.h" | 43 #include "sandbox/linux/services/init_process_reaper.h" |
45 #include "sandbox/linux/services/libc_urandom_override.h" | 44 #include "sandbox/linux/services/libc_urandom_override.h" |
46 #include "sandbox/linux/services/namespace_sandbox.h" | 45 #include "sandbox/linux/services/namespace_sandbox.h" |
47 #include "sandbox/linux/services/thread_helpers.h" | 46 #include "sandbox/linux/services/thread_helpers.h" |
48 #include "sandbox/linux/suid/client/setuid_sandbox_client.h" | 47 #include "sandbox/linux/suid/client/setuid_sandbox_client.h" |
49 #include "third_party/icu/source/i18n/unicode/timezone.h" | 48 #include "third_party/icu/source/i18n/unicode/timezone.h" |
50 #include "third_party/skia/include/ports/SkFontConfigInterface.h" | 49 #include "third_party/skia/include/ports/SkFontConfigInterface.h" |
51 | 50 |
52 #if defined(OS_LINUX) | 51 #if defined(OS_LINUX) |
53 #include <sys/prctl.h> | 52 #include <sys/prctl.h> |
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74 namespace content { | 73 namespace content { |
75 | 74 |
76 namespace { | 75 namespace { |
77 | 76 |
78 void CloseFds(const std::vector<int>& fds) { | 77 void CloseFds(const std::vector<int>& fds) { |
79 for (const auto& it : fds) { | 78 for (const auto& it : fds) { |
80 PCHECK(0 == IGNORE_EINTR(close(it))); | 79 PCHECK(0 == IGNORE_EINTR(close(it))); |
81 } | 80 } |
82 } | 81 } |
83 | 82 |
84 void RunTwoClosures(const base::Closure* first, const base::Closure* second) { | |
85 first->Run(); | |
86 second->Run(); | |
87 } | |
88 | |
89 } // namespace | 83 } // namespace |
90 | 84 |
91 // See http://code.google.com/p/chromium/wiki/LinuxZygote | 85 // See http://code.google.com/p/chromium/wiki/LinuxZygote |
92 | 86 |
93 static void ProxyLocaltimeCallToBrowser(time_t input, struct tm* output, | 87 static void ProxyLocaltimeCallToBrowser(time_t input, struct tm* output, |
94 char* timezone_out, | 88 char* timezone_out, |
95 size_t timezone_out_len) { | 89 size_t timezone_out_len) { |
96 Pickle request; | 90 Pickle request; |
97 request.WriteInt(LinuxSandbox::METHOD_LOCALTIME); | 91 request.WriteInt(LinuxSandbox::METHOD_LOCALTIME); |
98 request.WriteString( | 92 request.WriteString( |
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406 if (getpid() == 1) { | 400 if (getpid() == 1) { |
407 // The setuid sandbox has created a new PID namespace and we need | 401 // The setuid sandbox has created a new PID namespace and we need |
408 // to assume the role of init. | 402 // to assume the role of init. |
409 CHECK(CreateInitProcessReaper(post_fork_parent_callback)); | 403 CHECK(CreateInitProcessReaper(post_fork_parent_callback)); |
410 } | 404 } |
411 | 405 |
412 CHECK(SandboxDebugHandling::SetDumpableStatusAndHandlers()); | 406 CHECK(SandboxDebugHandling::SetDumpableStatusAndHandlers()); |
413 return true; | 407 return true; |
414 } | 408 } |
415 | 409 |
416 static void DropAllCapabilities(int proc_fd) { | |
417 CHECK(sandbox::Credentials::DropAllCapabilities(proc_fd)); | |
418 } | |
419 | |
420 static void EnterNamespaceSandbox(LinuxSandbox* linux_sandbox, | 410 static void EnterNamespaceSandbox(LinuxSandbox* linux_sandbox, |
421 base::Closure* post_fork_parent_callback) { | 411 base::Closure* post_fork_parent_callback) { |
422 linux_sandbox->EngageNamespaceSandbox(); | 412 linux_sandbox->EngageNamespaceSandbox(); |
423 | 413 |
424 if (getpid() == 1) { | 414 if (getpid() == 1) { |
425 base::Closure drop_all_caps_callback = | 415 CHECK(CreateInitProcessReaper(post_fork_parent_callback)); |
426 base::Bind(&DropAllCapabilities, linux_sandbox->proc_fd()); | |
427 base::Closure callback = base::Bind( | |
428 &RunTwoClosures, &drop_all_caps_callback, post_fork_parent_callback); | |
429 CHECK(CreateInitProcessReaper(&callback)); | |
430 } | 416 } |
431 } | 417 } |
432 | 418 |
433 #if defined(SANITIZER_COVERAGE) | 419 #if defined(SANITIZER_COVERAGE) |
434 const size_t kSanitizerMaxMessageLength = 1 * 1024 * 1024; | 420 const size_t kSanitizerMaxMessageLength = 1 * 1024 * 1024; |
435 | 421 |
436 // A helper process which collects code coverage data from the renderers over a | 422 // A helper process which collects code coverage data from the renderers over a |
437 // socket and dumps it to a file. See http://crbug.com/336212 for discussion. | 423 // socket and dumps it to a file. See http://crbug.com/336212 for discussion. |
438 static void SanitizerCoverageHelper(int socket_fd, int file_fd) { | 424 static void SanitizerCoverageHelper(int socket_fd, int file_fd) { |
439 scoped_ptr<char[]> buffer(new char[kSanitizerMaxMessageLength]); | 425 scoped_ptr<char[]> buffer(new char[kSanitizerMaxMessageLength]); |
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610 const bool namespace_sandbox_engaged = sandbox_flags & kSandboxLinuxUserNS; | 596 const bool namespace_sandbox_engaged = sandbox_flags & kSandboxLinuxUserNS; |
611 CHECK_EQ(using_namespace_sandbox, namespace_sandbox_engaged); | 597 CHECK_EQ(using_namespace_sandbox, namespace_sandbox_engaged); |
612 | 598 |
613 Zygote zygote(sandbox_flags, fork_delegates.Pass(), extra_children, | 599 Zygote zygote(sandbox_flags, fork_delegates.Pass(), extra_children, |
614 extra_fds); | 600 extra_fds); |
615 // This function call can return multiple times, once per fork(). | 601 // This function call can return multiple times, once per fork(). |
616 return zygote.ProcessRequests(); | 602 return zygote.ProcessRequests(); |
617 } | 603 } |
618 | 604 |
619 } // namespace content | 605 } // namespace content |
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