Bitcoin-Qt: expand GCC Stack-Smashing Protector usage (non Windows)
This patch currently excludes our Windows executable! - change to use -fstack-protector-all - the minimum size of buffers (i.e. arrays) that will receive stack smashing protection was changed to 1 byte (GCC default: 8) - warn about functions that will not be protected against stack smashing by adding -Wstack-protector
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1 changed files with 8 additions and 7 deletions
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@ -30,6 +30,13 @@ contains(RELEASE, 1) {
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}
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}
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!win32 {
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# for extra security against potential buffer overflows: enable GCCs Stack Smashing Protection
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QMAKE_CXXFLAGS *= -fstack-protector-all --param ssp-buffer-size=1
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QMAKE_LFLAGS *= -fstack-protector-all --param ssp-buffer-size=1
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# We need to exclude this for Windows cross compile with MinGW 4.2.x, as it will result in a non-working executable!
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# This can be enabled for Windows, when we switch to MinGW >= 4.4.x.
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}
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# for extra security on Windows: enable ASLR and DEP via GCC linker flags
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win32:QMAKE_LFLAGS *= -Wl,--dynamicbase -Wl,--nxcompat
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@ -82,12 +89,6 @@ contains(BITCOIN_NEED_QT_PLUGINS, 1) {
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QTPLUGIN += qcncodecs qjpcodecs qtwcodecs qkrcodecs qtaccessiblewidgets
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}
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!windows {
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# for extra security against potential buffer overflows
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QMAKE_CXXFLAGS += -fstack-protector
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QMAKE_LFLAGS += -fstack-protector
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# do not enable this on windows cross compile with mingw 4.2.x, as it will result in a non-working executable!
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}
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# regenerate src/build.h
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!windows|contains(USE_BUILD_INFO, 1) {
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@ -99,7 +100,7 @@ contains(BITCOIN_NEED_QT_PLUGINS, 1) {
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DEFINES += HAVE_BUILD_INFO
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}
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QMAKE_CXXFLAGS_WARN_ON = -fdiagnostics-show-option -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter
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QMAKE_CXXFLAGS_WARN_ON = -fdiagnostics-show-option -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter -Wstack-protector
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# Input
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DEPENDPATH += src src/json src/qt
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