diff options
Diffstat (limited to 'security/sandbox/chromium-shim/patches/after_update/move_shared_memory_duplication_after_initialization.patch')
| -rw-r--r-- | security/sandbox/chromium-shim/patches/after_update/move_shared_memory_duplication_after_initialization.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/security/sandbox/chromium-shim/patches/after_update/move_shared_memory_duplication_after_initialization.patch b/security/sandbox/chromium-shim/patches/after_update/move_shared_memory_duplication_after_initialization.patch new file mode 100644 index 0000000000..f8250b788d --- /dev/null +++ b/security/sandbox/chromium-shim/patches/after_update/move_shared_memory_duplication_after_initialization.patch @@ -0,0 +1,94 @@ +# HG changeset patch +# User Bob Owen <bobowencode@gmail.com> +# Date 1577387989 0 +# Thu Dec 26 19:19:49 2019 +0000 +# Node ID 32adf437117bdca54be4959813acbb604f65137f +# Parent 214214029beb6cca606e11ba519d11cc7dbb37af +Bug 1605867: Don't duplicate IPC shared memory when we might fail to launch the process correctly. r=handyman + +Differential Revision: https://phabricator.services.mozilla.com/D58271 + +diff --git a/security/sandbox/chromium/sandbox/win/src/target_process.cc b/security/sandbox/chromium/sandbox/win/src/target_process.cc +--- a/security/sandbox/chromium/sandbox/win/src/target_process.cc ++++ b/security/sandbox/chromium/sandbox/win/src/target_process.cc +@@ -286,45 +286,28 @@ ResultCode TargetProcess::Init(Dispatche + shared_section_.Set(::CreateFileMappingW(INVALID_HANDLE_VALUE, nullptr, + PAGE_READWRITE | SEC_COMMIT, 0, + shared_mem_size, nullptr)); + if (!shared_section_.IsValid()) { + *win_error = ::GetLastError(); + return SBOX_ERROR_CREATE_FILE_MAPPING; + } + +- DWORD access = FILE_MAP_READ | FILE_MAP_WRITE | SECTION_QUERY; +- HANDLE target_shared_section; +- if (!::DuplicateHandle(::GetCurrentProcess(), shared_section_.Get(), +- sandbox_process_info_.process_handle(), +- &target_shared_section, access, false, 0)) { +- *win_error = ::GetLastError(); +- return SBOX_ERROR_DUPLICATE_SHARED_SECTION; +- } +- + void* shared_memory = ::MapViewOfFile( + shared_section_.Get(), FILE_MAP_WRITE | FILE_MAP_READ, 0, 0, 0); + if (!shared_memory) { + *win_error = ::GetLastError(); + return SBOX_ERROR_MAP_VIEW_OF_SHARED_SECTION; + } + + CopyPolicyToTarget(policy, shared_policy_size, + reinterpret_cast<char*>(shared_memory) + shared_IPC_size); + + ResultCode ret; + // Set the global variables in the target. These are not used on the broker. +- g_shared_section = target_shared_section; +- ret = TransferVariable("g_shared_section", &g_shared_section, +- sizeof(g_shared_section)); +- g_shared_section = nullptr; +- if (SBOX_ALL_OK != ret) { +- *win_error = ::GetLastError(); +- return ret; +- } + g_shared_IPC_size = shared_IPC_size; + ret = TransferVariable("g_shared_IPC_size", &g_shared_IPC_size, + sizeof(g_shared_IPC_size)); + g_shared_IPC_size = 0; + if (SBOX_ALL_OK != ret) { + *win_error = ::GetLastError(); + return ret; + } +@@ -339,16 +322,34 @@ ResultCode TargetProcess::Init(Dispatche + + ipc_server_.reset(new SharedMemIPCServer( + sandbox_process_info_.process_handle(), + sandbox_process_info_.process_id(), thread_pool_, ipc_dispatcher)); + + if (!ipc_server_->Init(shared_memory, shared_IPC_size, kIPCChannelSize)) + return SBOX_ERROR_NO_SPACE; + ++ DWORD access = FILE_MAP_READ | FILE_MAP_WRITE | SECTION_QUERY; ++ HANDLE target_shared_section; ++ if (!::DuplicateHandle(::GetCurrentProcess(), shared_section_.Get(), ++ sandbox_process_info_.process_handle(), ++ &target_shared_section, access, false, 0)) { ++ *win_error = ::GetLastError(); ++ return SBOX_ERROR_DUPLICATE_SHARED_SECTION; ++ } ++ ++ g_shared_section = target_shared_section; ++ ret = TransferVariable("g_shared_section", &g_shared_section, ++ sizeof(g_shared_section)); ++ g_shared_section = nullptr; ++ if (SBOX_ALL_OK != ret) { ++ *win_error = ::GetLastError(); ++ return ret; ++ } ++ + // After this point we cannot use this handle anymore. + ::CloseHandle(sandbox_process_info_.TakeThreadHandle()); + + return SBOX_ALL_OK; + } + + void TargetProcess::Terminate() { + if (!sandbox_process_info_.IsValid()) |