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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-03-18 16:25:48 +0100 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2016-03-18 16:27:29 +0100 |
| commit | 646679da4d79bf7f8af22c44c7ae8498086a88a6 (patch) | |
| tree | ad44ddf32662d1896b5502224add0676c4dd2904 | |
| parent | fd26f49958a147b00cfa51e054257587ea4d5a28 (diff) | |
| download | VeraCrypt-646679da4d79bf7f8af22c44c7ae8498086a88a6.tar.gz VeraCrypt-646679da4d79bf7f8af22c44c7ae8498086a88a6.zip | |
Linux: Completely fix gcc-5 "Invalid characters encountered" issue on mount. It was caused by an issue of gcc-5 STL implementation that is causing char* pointers retrieved from std::string using c_str method to become invalid in the child of a child process (after two fork calls). The workaround is to first copy the std:string values in the child before calling the second fork.
| -rw-r--r-- | src/Platform/Unix/Process.cpp | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/src/Platform/Unix/Process.cpp b/src/Platform/Unix/Process.cpp index 388bda6b..07703649 100644 --- a/src/Platform/Unix/Process.cpp +++ b/src/Platform/Unix/Process.cpp @@ -53,13 +53,33 @@ namespace VeraCrypt try { int argIndex = 0; + /* Workaround for gcc 5.X issue related to the use of STL (string and list) with muliple fork calls. + * + * The char* pointers retrieved from the elements of parameter "arguments" are no longer valid after + * a second fork is called. "arguments" was created in the parent of the current child process. + * + * The only solution is to copy the elements of "arguments" parameter in a local string array on this + * child process and then use char* pointers retrieved from this local copies before calling fork. + * + * gcc 4.x doesn't suffer from this issue. + * + */ + string argsCopy[array_capacity (args)]; if (!execFunctor) - args[argIndex++] = const_cast <char*> (processName.c_str()); + { + argsCopy[argIndex++] = processName; + } foreach (const string &arg, arguments) { - args[argIndex++] = const_cast <char*> (arg.c_str()); + argsCopy[argIndex++] = arg; } + + for (int i = 0; i < argIndex; i++) + { + args[i] = const_cast <char*> (argsCopy[i].c_str()); + } + args[argIndex] = nullptr; if (inputData) |