Library: Added <minsize> element used for buffer overrun checking
This commit is contained in:
Daniel Marjamäki
parent
88890a851c
commit
a3acc3241e
35
cfg/std.cfg
35
cfg/std.cfg
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@ -73,13 +73,6 @@
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<arg nr="1"><not-null/><not-uninit/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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</function>
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<function name="fgets">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="2"><not-uninit/><not-bool/><valid>0:</valid></arg>
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<arg nr="3"><not-null/><not-uninit/></arg>
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</function>
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<function name="floor"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-null/><not-uninit/></arg></function>
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<function name="fmod"><noreturn>false</noreturn><leak-ignore/><arg nr="1"><not-null/><not-uninit/></arg><arg nr="2"><not-null/><not-uninit/></arg></function>
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<function name="fopen">
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@ -135,7 +128,7 @@
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<function name="fread">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="1"><not-null/><minsize type="mul" arg="2" arg2="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="3"><not-null/><not-uninit/></arg>
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<arg nr="4"><not-null/><not-uninit/></arg>
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@ -184,7 +177,7 @@
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<function name="fgets">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="1"><not-null/><minsize type="argvalue" arg="2"/></arg>
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<arg nr="2"><not-uninit/><not-bool/><valid>0:</valid></arg>
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<arg nr="3"><not-null/><not-uninit/></arg>
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</function>
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@ -196,7 +189,7 @@
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<function name="fwrite">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/><not-uninit/></arg>
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<arg nr="1"><not-null/><not-uninit/><minsize type="mul" arg="2" arg2="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="3"><not-null/><not-uninit/></arg>
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<arg nr="4"><not-null/><not-uninit/></arg>
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@ -294,35 +287,35 @@
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<function name="memchr">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/><not-uninit/></arg>
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<arg nr="1"><not-null/><not-uninit/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-uninit/><not-bool/><valid>0:</valid></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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<function name="memcmp">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/><not-uninit/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="1"><not-null/><not-uninit/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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<function name="memcpy">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="1"><not-null/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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<function name="memmove">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="1"><not-null/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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<function name="memset">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="1"><not-null/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-uninit/></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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@ -505,7 +498,7 @@
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<function name="strcpy">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="1"><not-null/><minsize type="strlen" arg="2"/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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</function>
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<function name="wcscpy">
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@ -535,14 +528,14 @@
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<function name="strncpy">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/></arg>
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<arg nr="1"><not-null/><minsize type="sizeof" arg="2"/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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<function name="strncat">
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<noreturn>false</noreturn>
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<leak-ignore/>
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<arg nr="1"><not-null/><not-uninit/></arg>
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<arg nr="1"><not-null/><not-uninit/><minsize type="argvalue" arg="3"/></arg>
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<arg nr="2"><not-null/><not-uninit/></arg>
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<arg nr="3"><not-bool/><valid>0:</valid></arg>
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</function>
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@ -264,87 +264,65 @@ static bool bailoutIfSwitch(const Token *tok, const unsigned int varid)
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}
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//---------------------------------------------------------------------------
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void CheckBufferOverrun::checkFunctionParameter(const Token &tok, unsigned int par, const ArrayInfo &arrayInfo, const std::list<const Token *>& callstack)
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void CheckBufferOverrun::checkFunctionParameter(const Token &ftok, unsigned int par, const ArrayInfo &arrayInfo, const std::list<const Token *>& callstack)
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{
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// total_size : which parameter in function call takes the total size?
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std::map<std::string, unsigned int> total_size;
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const std::list<Library::ArgumentChecks::MinSize> * const minsizes = _settings->library.argminsizes(ftok.str(),par);
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if (!(Token::simpleMatch(tok.previous(), ".") || Token::Match(tok.tokAt(-2), "!!std ::"))) {
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total_size["fgets"] = 2; // The second argument for fgets can't exceed the total size of the array
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total_size["memcmp"] = 3;
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total_size["memcpy"] = 3;
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total_size["memmove"] = 3;
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total_size["memchr"] = 3;
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if (par == 1) {
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// reading from array
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// if it is zero terminated properly there won't be buffer overruns
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total_size["strncat"] = 3;
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total_size["strncpy"] = 3;
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total_size["memset"] = 3;
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total_size["fread"] = 1001; // parameter 2 * parameter 3
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total_size["fwrite"] = 1001; // parameter 2 * parameter 3
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}
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else if (par == 2) {
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if (_settings->standards.posix) {
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total_size["read"] = 3;
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total_size["pread"] = 3;
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total_size["write"] = 3;
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total_size["recv"] = 3;
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total_size["recvfrom"] = 3;
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total_size["send"] = 3;
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total_size["sendto"] = 3;
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}
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}
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}
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std::map<std::string, unsigned int>::const_iterator it = total_size.find(tok.str());
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if (it != total_size.end()) {
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if (minsizes && !minsizes->empty() && (!(Token::simpleMatch(ftok.previous(), ".") || Token::Match(ftok.tokAt(-2), "!!std ::")))) {
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if (arrayInfo.element_size() == 0)
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return;
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// arg : the index of the "wanted" argument in the function call.
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const unsigned int arg = it->second;
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// Parse function call. When a ',' is seen, arg is decremented.
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// if arg becomes 1 then the current function parameter is the wanted parameter.
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// if arg becomes 1001 then multiply current and next argument.
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const Token *tok2 = tok.tokAt(2)->nextArgument();
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if (arg == 3)
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tok2 = tok2->nextArgument();
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if ((arg == 2 || arg == 3) && tok2) {
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if (Token::Match(tok2, "%num% ,|)")) {
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const MathLib::bigint sz = MathLib::toLongNumber(tok2->str());
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MathLib::bigint elements = 1;
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MathLib::bigint arraySize = arrayInfo.element_size();
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for (unsigned int i = 0; i < arrayInfo.num().size(); ++i)
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elements *= arrayInfo.num(i);
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if (sz < 0 || sz > int(elements * arrayInfo.element_size())) {
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arraySize *= arrayInfo.num(i);
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bool error = true;
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for (std::list<Library::ArgumentChecks::MinSize>::const_iterator minsize = minsizes->begin(); minsize != minsizes->end(); ++minsize) {
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if (!error)
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break;
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error = false;
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const Token *argtok = ftok.tokAt(2);
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for (int argnum = 1; argtok && argnum < minsize->arg; argnum++)
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argtok = argtok->nextArgument();
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if (!argtok)
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break;
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switch (minsize->type) {
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case Library::ArgumentChecks::MinSize::Type::ARGVALUE:
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if (Token::Match(argtok, "%num% ,|)")) {
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const MathLib::bigint sz = MathLib::toLongNumber(argtok->str());
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if (sz > arraySize)
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error = true;
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} else if (argtok->type() == Token::eChar && Token::Match(argtok->next(), ",|)"))
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sizeArgumentAsCharError(argtok);
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break;
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case Library::ArgumentChecks::MinSize::Type::MUL:
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// TODO: handle arbitrary arg2
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if (minsize->arg2 == minsize->arg+1 && Token::Match(argtok, "%num% , %num% ,|)")) {
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const MathLib::bigint sz = MathLib::toLongNumber(argtok->str()) * MathLib::toLongNumber(argtok->strAt(2));
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if (sz > arraySize)
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error = true;
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}
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break;
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case Library::ArgumentChecks::MinSize::Type::STRLEN:
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if (argtok->type() == Token::eString && Token::getStrLength(argtok) >= arraySize)
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error = true;
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break;
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case Library::ArgumentChecks::MinSize::Type::SIZEOF:
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if (argtok->type() == Token::eString && Token::getStrLength(argtok) >= arraySize)
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error = true;
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break;
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case Library::ArgumentChecks::MinSize::Type::NONE:
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break;
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};
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}
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if (error)
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bufferOverrunError(callstack, arrayInfo.varname());
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}
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}
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else if (Token::Match(tok2->next(), ",|)") && tok2->type() == Token::eChar) {
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sizeArgumentAsCharError(tok2);
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}
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} else if (arg == 1001) { // special code. This parameter multiplied with the next must not exceed total_size
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if (Token::Match(tok2, "%num% , %num% ,|)")) {
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const MathLib::bigint sz = MathLib::toLongNumber(MathLib::multiply(tok2->str(), tok2->strAt(2)));
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MathLib::bigint elements = 1;
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for (unsigned int i = 0; i < arrayInfo.num().size(); ++i)
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elements *= arrayInfo.num(i);
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if (sz < 0 || sz > int(elements * arrayInfo.element_size())) {
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bufferOverrunError(&tok, arrayInfo.varname());
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}
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}
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}
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}
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// Calling a user function?
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// only 1-dimensional arrays can be checked currently
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else if (arrayInfo.num().size() == 1) {
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const Function* const func = tok.function();
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const Function* const func = ftok.function();
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if (func && func->hasBody) {
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// Get corresponding parameter..
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@ -361,38 +339,38 @@ void CheckBufferOverrun::checkFunctionParameter(const Token &tok, unsigned int p
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return;
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// Check the parameter usage in the function scope..
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for (const Token* ftok = func->functionScope->classStart; ftok != func->functionScope->classEnd; ftok = ftok->next()) {
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if (Token::Match(ftok, "if|for|switch|while (")) {
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for (const Token* ftok2 = func->functionScope->classStart; ftok2 != func->functionScope->classEnd; ftok2 = ftok2->next()) {
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if (Token::Match(ftok2, "if|for|switch|while (")) {
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// bailout if there is buffer usage..
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if (bailoutIfSwitch(ftok, parameter->declarationId())) {
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if (bailoutIfSwitch(ftok2, parameter->declarationId())) {
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break;
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}
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// no bailout is needed. skip the if-block
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else {
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// goto end of if block..
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ftok = ftok->next()->link()->next()->link();
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if (Token::simpleMatch(ftok, "} else {"))
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ftok = ftok->linkAt(2);
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if (!ftok)
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ftok2 = ftok2->linkAt(1)->linkAt(1);
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if (Token::simpleMatch(ftok2, "} else {"))
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ftok2 = ftok2->linkAt(2);
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if (!ftok2)
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break;
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continue;
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}
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}
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if (ftok->str() == "}")
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if (ftok2->str() == "}")
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break;
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if (ftok->varId() == parameter->declarationId()) {
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if (Token::Match(ftok->previous(), "-- %var%") ||
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Token::Match(ftok, "%var% --"))
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if (ftok2->varId() == parameter->declarationId()) {
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if (Token::Match(ftok2->previous(), "-- %var%") ||
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Token::Match(ftok2, "%var% --"))
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break;
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if (Token::Match(ftok->previous(), ";|{|}|%op% %var% [ %num% ]")) {
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const MathLib::bigint index = MathLib::toLongNumber(ftok->strAt(2));
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if (Token::Match(ftok2->previous(), ";|{|}|%op% %var% [ %num% ]")) {
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const MathLib::bigint index = MathLib::toLongNumber(ftok2->strAt(2));
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if (index >= 0 && arrayInfo.num(0) > 0 && index >= arrayInfo.num(0)) {
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std::list<const Token *> callstack2(callstack);
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callstack2.push_back(ftok);
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callstack2.push_back(ftok2);
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std::vector<MathLib::bigint> indexes;
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indexes.push_back(index);
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@ -403,10 +381,10 @@ void CheckBufferOverrun::checkFunctionParameter(const Token &tok, unsigned int p
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}
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// Calling function..
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if (Token::Match(ftok, "%var% (")) {
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if (Token::Match(ftok2, "%var% (")) {
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ArrayInfo ai(arrayInfo);
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ai.declarationId(parameter->declarationId());
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checkFunctionCall(ftok, ai, callstack);
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checkFunctionCall(ftok2, ai, callstack);
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}
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}
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}
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@ -414,7 +392,7 @@ void CheckBufferOverrun::checkFunctionParameter(const Token &tok, unsigned int p
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// Check 'float x[10]' arguments in declaration
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if (_settings->isEnabled("warning")) {
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const Function* const func = tok.function();
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const Function* const func = ftok.function();
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// If argument is '%type% a[num]' then check bounds against num
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if (func) {
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@ -439,7 +417,7 @@ void CheckBufferOverrun::checkFunctionParameter(const Token &tok, unsigned int p
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arraysize *= arrayInfo.num(i);
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if (Token::Match(tok2, "[,)]") && arraysize > 0 && argsize > arraysize)
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argumentSizeError(&tok, tok.str(), arrayInfo.varname());
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argumentSizeError(&ftok, ftok.str(), arrayInfo.varname());
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}
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}
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}
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@ -169,6 +169,7 @@ Library::Error Library::load(const tinyxml2::XMLDocument &doc)
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bool formatstr = false;
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bool strz = false;
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std::string valid;
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std::list<ArgumentChecks::MinSize> minsizes;
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for (const tinyxml2::XMLElement *argnode = functionnode->FirstChildElement(); argnode; argnode = argnode->NextSiblingElement()) {
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if (strcmp(argnode->Name(), "not-bool") == 0)
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notbool = true;
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@ -206,6 +207,40 @@ Library::Error Library::load(const tinyxml2::XMLDocument &doc)
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valid = argnode->GetText();
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}
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else if (strcmp(argnode->Name(), "minsize") == 0) {
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const char *typeattr = argnode->Attribute("type");
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if (!typeattr)
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return Error(MISSING_ATTRIBUTE, "type");
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ArgumentChecks::MinSize::Type type;
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if (strcmp(typeattr,"strlen")==0)
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type = ArgumentChecks::MinSize::Type::STRLEN;
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else if (strcmp(typeattr,"argvalue")==0)
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type = ArgumentChecks::MinSize::Type::ARGVALUE;
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else if (strcmp(typeattr,"sizeof")==0)
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type = ArgumentChecks::MinSize::Type::SIZEOF;
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else if (strcmp(typeattr,"mul")==0)
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type = ArgumentChecks::MinSize::Type::MUL;
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else
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return Error(BAD_ATTRIBUTE_VALUE, typeattr);
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const char *argattr = argnode->Attribute("arg");
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if (!argattr)
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return Error(MISSING_ATTRIBUTE, "arg");
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if (strlen(argattr) != 1 || argattr[0]<'0' || argattr[0]>'9')
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return Error(BAD_ATTRIBUTE_VALUE, argattr);
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minsizes.push_back(ArgumentChecks::MinSize(type,argattr[0]-'0'));
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if (type == ArgumentChecks::MinSize::Type::MUL) {
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const char *arg2attr = argnode->Attribute("arg2");
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if (!arg2attr)
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return Error(MISSING_ATTRIBUTE, "arg2");
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if (strlen(arg2attr) != 1 || arg2attr[0]<'0' || arg2attr[0]>'9')
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return Error(BAD_ATTRIBUTE_VALUE, arg2attr);
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minsizes.back().arg2 = arg2attr[0] - '0';
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}
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}
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else
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||||
return Error(BAD_ATTRIBUTE, argnode->Name());
|
||||
}
|
||||
|
|
@ -214,7 +249,8 @@ Library::Error Library::load(const tinyxml2::XMLDocument &doc)
|
|||
argumentChecks[name][nr].notuninit = notuninit;
|
||||
argumentChecks[name][nr].formatstr = formatstr;
|
||||
argumentChecks[name][nr].strz = strz;
|
||||
argumentChecks[name][nr].valid = valid;
|
||||
argumentChecks[name][nr].valid.swap(valid);
|
||||
argumentChecks[name][nr].minsizes.swap(minsizes);
|
||||
} else if (strcmp(functionnode->Name(), "ignorefunction") == 0) {
|
||||
_ignorefunction.insert(name);
|
||||
} else if (strcmp(functionnode->Name(), "formatstr") == 0) {
|
||||
|
|
|
|||
|
|
@ -152,6 +152,16 @@ public:
|
|||
bool formatstr;
|
||||
bool strz;
|
||||
std::string valid;
|
||||
|
||||
class MinSize {
|
||||
public:
|
||||
enum Type {NONE,STRLEN,ARGVALUE,SIZEOF,MUL};
|
||||
MinSize(Type t, int a) : type(t), arg(a), arg2(0) {}
|
||||
Type type;
|
||||
int arg;
|
||||
int arg2;
|
||||
};
|
||||
std::list<MinSize> minsizes;
|
||||
};
|
||||
|
||||
// function name, argument nr => argument data
|
||||
|
|
@ -189,6 +199,24 @@ public:
|
|||
return arg ? arg->valid : emptyString;
|
||||
}
|
||||
|
||||
bool hasminsize(const std::string &functionName) const {
|
||||
std::map<std::string, std::map<int, ArgumentChecks> >::const_iterator it1;
|
||||
it1 = argumentChecks.find(functionName);
|
||||
if (it1 == argumentChecks.end())
|
||||
return false;
|
||||
std::map<int,ArgumentChecks>::const_iterator it2;
|
||||
for (it2 = it1->second.begin(); it2 != it1->second.end(); ++it2) {
|
||||
if (!it2->second.minsizes.empty())
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
const std::list<ArgumentChecks::MinSize> *argminsizes(const std::string &functionName, int argnr) const {
|
||||
const ArgumentChecks *arg = getarg(functionName, argnr);
|
||||
return arg ? &arg->minsizes : nullptr;
|
||||
}
|
||||
|
||||
bool markupFile(const std::string &path) const {
|
||||
return _markupExtensions.find(Path::getFilenameExtensionInLowerCase(path)) != _markupExtensions.end();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -72,6 +72,31 @@ private:
|
|||
checkBufferOverrun.writeOutsideBufferSize();
|
||||
}
|
||||
|
||||
void checkstd(const char code[], const char filename[] = "test.cpp") {
|
||||
static bool init;
|
||||
static Settings settings;
|
||||
if (!init) {
|
||||
init = true;
|
||||
LOAD_LIB_2(settings.library, "std.cfg");
|
||||
settings.addEnabled("warning");
|
||||
}
|
||||
|
||||
Tokenizer tokenizer(&settings, this);
|
||||
std::istringstream istr(code);
|
||||
tokenizer.tokenize(istr, filename);
|
||||
|
||||
// Clear the error buffer..
|
||||
errout.str("");
|
||||
|
||||
// Check for buffer overruns..
|
||||
CheckBufferOverrun checkBufferOverrun(&tokenizer, &settings, this);
|
||||
checkBufferOverrun.bufferOverrun();
|
||||
checkBufferOverrun.bufferOverrun2();
|
||||
checkBufferOverrun.arrayIndexThenCheck();
|
||||
checkBufferOverrun.writeOutsideBufferSize();
|
||||
}
|
||||
|
||||
|
||||
void run() {
|
||||
TEST_CASE(noerr1);
|
||||
TEST_CASE(noerr2);
|
||||
|
|
@ -696,7 +721,7 @@ private:
|
|||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
// #3168
|
||||
check("void a(char *p) { memset(p,0,100); }\n"
|
||||
checkstd("void a(char *p) { memset(p,0,100); }\n"
|
||||
"void b() {\n"
|
||||
" char buf[10];\n"
|
||||
" a(buf);"
|
||||
|
|
@ -2071,14 +2096,7 @@ private:
|
|||
ASSERT_EQUALS("", errout.str());
|
||||
}
|
||||
|
||||
void buffer_overrun_1_standard_functions() {
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
" char str[3];\n"
|
||||
" strcpy(str, \"abc\");\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
void buffer_overrun_1_posix_functions() {
|
||||
check("void f(int fd)\n"
|
||||
"{\n"
|
||||
" char str[3];\n"
|
||||
|
|
@ -2114,50 +2132,6 @@ private:
|
|||
"}", false, "test.cpp", false);
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
" char str[3];\n"
|
||||
" fgets(str, 3, stdin);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
" char str[3];\n"
|
||||
" fgets(str, 4, stdin);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
// fread
|
||||
check("void f(FILE* fd)\n"
|
||||
"{\n"
|
||||
"char str[3];\n"
|
||||
"fread(str,1,4,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
check("void f(FILE* fd)\n"
|
||||
"{\n"
|
||||
"char str[3];\n"
|
||||
"fread(str,1,3,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
// fwrite
|
||||
check("void f(FILE* fd)\n"
|
||||
"{\n"
|
||||
"char str[3];\n"
|
||||
"fwrite(str,1,4,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
check("void f(FILE* fd)\n"
|
||||
"{\n"
|
||||
"char str[3];\n"
|
||||
"fwrite(str,1,3,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
"char str[3];\n"
|
||||
|
|
@ -2185,9 +2159,56 @@ private:
|
|||
"sendto(s, str, 4, 0, 0x0, 0x0);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
}
|
||||
|
||||
void buffer_overrun_1_standard_functions() {
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
" char str[3];\n"
|
||||
" strcpy(str, \"abc\");\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
checkstd("void f() {\n"
|
||||
" char str[3];\n"
|
||||
" fgets(str, 3, stdin);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
checkstd("void f() {\n"
|
||||
" char str[3];\n"
|
||||
" fgets(str, 4, stdin);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
// fread
|
||||
checkstd("void f(FILE* fd) {\n"
|
||||
" char str[3];\n"
|
||||
" fread(str,1,4,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
checkstd("void f(FILE* fd) {\n"
|
||||
" char str[3];\n"
|
||||
" fread(str,1,3,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
// fwrite
|
||||
checkstd("void f(FILE* fd) {\n"
|
||||
" char str[3];\n"
|
||||
" fwrite(str,1,4,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
checkstd("void f(FILE* fd) {\n"
|
||||
" char str[3];\n"
|
||||
" fwrite(str,1,3,fd);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
// #4968 - not standard function
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char str[3];\n"
|
||||
" foo.memset(str, 0, 100);\n"
|
||||
" foo::memset(str, 0, 100);\n"
|
||||
|
|
@ -2423,13 +2444,13 @@ private:
|
|||
|
||||
void buffer_overrun_13() {
|
||||
// ticket #836
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char a[10];\n"
|
||||
" memset(a+5, 0, 10);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: a\n", errout.str());
|
||||
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char a[10];\n"
|
||||
" memmove(a, a+5, 10);\n"
|
||||
"}");
|
||||
|
|
@ -2437,21 +2458,21 @@ private:
|
|||
}
|
||||
|
||||
void buffer_overrun_14() {
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = new char[strlen(a)];\n"
|
||||
" strcpy(b, a);\n"
|
||||
" return b;\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = new char[strlen(a) + 1];\n"
|
||||
" strcpy(b, a);\n"
|
||||
" return b;\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = new char[strlen(a)];\n"
|
||||
" a[0] = '\\0';\n"
|
||||
" strcpy(b, a);\n"
|
||||
|
|
@ -2459,7 +2480,7 @@ private:
|
|||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = malloc(strlen(a));\n"
|
||||
" b = realloc(b, 10000);\n"
|
||||
" strcpy(b, a);\n"
|
||||
|
|
@ -2467,14 +2488,14 @@ private:
|
|||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = malloc(strlen(a));\n"
|
||||
" strcpy(b, a);\n"
|
||||
" return b;\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = malloc(strlen(a));\n"
|
||||
" {\n"
|
||||
" strcpy(b, a);\n"
|
||||
|
|
@ -2483,28 +2504,28 @@ private:
|
|||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = malloc(strlen(a) + 1);\n"
|
||||
" strcpy(b, a);\n"
|
||||
" return b;\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f(char *a, char *c) {\n"
|
||||
checkstd("void f(char *a, char *c) {\n"
|
||||
" char *b = realloc(c, strlen(a));\n"
|
||||
" strcpy(b, a);\n"
|
||||
" return b;\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
|
||||
check("void f(char *a, char *c) {\n"
|
||||
checkstd("void f(char *a, char *c) {\n"
|
||||
" char *b = realloc(c, strlen(a) + 1);\n"
|
||||
" strcpy(b, a);\n"
|
||||
" return b;\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char *b = malloc(strlen(a));\n"
|
||||
" sprintf(b, \"%s\", a);\n"
|
||||
" return b;\n"
|
||||
|
|
@ -2610,7 +2631,7 @@ private:
|
|||
}
|
||||
|
||||
void buffer_overrun_22() { // ticket #3124
|
||||
check("class A {\n"
|
||||
checkstd("class A {\n"
|
||||
"public:\n"
|
||||
" char b[5][6];\n"
|
||||
"};\n"
|
||||
|
|
@ -2618,10 +2639,9 @@ private:
|
|||
" A a;\n"
|
||||
" memset(a.b, 0, 5 * 6);\n"
|
||||
"}");
|
||||
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("class A {\n"
|
||||
checkstd("class A {\n"
|
||||
"public:\n"
|
||||
" char b[5][6];\n"
|
||||
"};\n"
|
||||
|
|
@ -2629,23 +2649,22 @@ private:
|
|||
" A a;\n"
|
||||
" memset(a.b, 0, 6 * 6);\n"
|
||||
"}");
|
||||
|
||||
ASSERT_EQUALS("[test.cpp:7]: (error) Buffer is accessed out of bounds: a.b\n", errout.str());
|
||||
}
|
||||
|
||||
void buffer_overrun_23() { // ticket #3153
|
||||
check("void foo() {\n"
|
||||
checkstd("void foo() {\n"
|
||||
" double dest = 23.0;\n"
|
||||
" char* const source = (char*) malloc(sizeof(dest));\n"
|
||||
" memcpy(&dest, source + sizeof(double), sizeof(dest));\n"
|
||||
"}", false, "test.cpp", false);
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds.\n", "", errout.str());
|
||||
|
||||
check("void foo() {\n"
|
||||
checkstd("void foo() {\n"
|
||||
" double dest = 23.0;\n"
|
||||
" char* const source = (char*) malloc(2 * sizeof(dest));\n"
|
||||
" memcpy(&dest, source + sizeof(double), sizeof(dest));\n"
|
||||
"}", false, "test.cpp", false);
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
}
|
||||
|
||||
|
|
@ -3085,36 +3104,33 @@ private:
|
|||
}
|
||||
|
||||
void strncat1() {
|
||||
check("void f(char *a, char *b)\n"
|
||||
"{\n"
|
||||
checkstd("void f(char *a, char *b) {\n"
|
||||
" char str[16];\n"
|
||||
" strncpy(str, a, 10);\n"
|
||||
" strncat(str, b, 10);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:5]: (warning) Dangerous usage of strncat - 3rd parameter is the maximum number of characters to append.\n", errout.str());
|
||||
}
|
||||
|
||||
void strncat2() {
|
||||
check("void f(char *a)\n"
|
||||
"{\n"
|
||||
" char str[5];\n"
|
||||
" strncat(str, a, 5);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (warning) Dangerous usage of strncat - 3rd parameter is the maximum number of characters to append.\n", errout.str());
|
||||
}
|
||||
|
||||
void strncat2() {
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char str[5];\n"
|
||||
" strncat(str, a, 5);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (warning) Dangerous usage of strncat - 3rd parameter is the maximum number of characters to append.\n", errout.str());
|
||||
}
|
||||
|
||||
void strncat3() {
|
||||
check("struct Foo { char a[4]; };\n"
|
||||
"void f(char *a)\n"
|
||||
"{\n"
|
||||
checkstd("struct Foo { char a[4]; };\n"
|
||||
"void f(char *a) {\n"
|
||||
" struct Foo x;\n"
|
||||
" strncat(x.a, a, 5);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:5]: (error) Buffer is accessed out of bounds: x.a\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: x.a\n", errout.str());
|
||||
}
|
||||
|
||||
void strncat4() {
|
||||
check("void f(char *a) {\n"
|
||||
checkstd("void f(char *a) {\n"
|
||||
" char str[5];\n"
|
||||
" strncat(str, \"foobar\", 5);\n"
|
||||
"}");
|
||||
|
|
@ -3123,20 +3139,18 @@ private:
|
|||
|
||||
|
||||
void strcat1() {
|
||||
check("struct Foo { char a[4]; };\n"
|
||||
"void f()\n"
|
||||
"{\n"
|
||||
checkstd("struct Foo { char a[4]; };\n"
|
||||
"void f() {\n"
|
||||
" struct Foo x;\n"
|
||||
" strcat(x.a, \"aa\");\n"
|
||||
" strcat(x.a, \"aa\");\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:6]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:5]: (error) Buffer is accessed out of bounds.\n", errout.str());
|
||||
}
|
||||
|
||||
void strcat2() {
|
||||
check("struct Foo { char a[5]; };\n"
|
||||
"void f()\n"
|
||||
"{\n"
|
||||
checkstd("struct Foo { char a[5]; };\n"
|
||||
"void f() {\n"
|
||||
" struct Foo x;\n"
|
||||
" strcat(x.a, \"aa\");\n"
|
||||
" strcat(x.a, \"aa\");\n"
|
||||
|
|
@ -3145,7 +3159,7 @@ private:
|
|||
}
|
||||
|
||||
void strcat3() {
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" INT str[10];\n"
|
||||
" strcat(str, \"aa\");\n"
|
||||
"}");
|
||||
|
|
@ -3155,51 +3169,45 @@ private:
|
|||
|
||||
// memchr/memset/memcpy/etc
|
||||
void memfunc1() {
|
||||
check("struct S {\n"
|
||||
checkstd("struct S {\n"
|
||||
" char a[5];\n"
|
||||
"};\n"
|
||||
"void f()\n"
|
||||
"{\n"
|
||||
"void f() {\n"
|
||||
" S s;\n"
|
||||
" memset(s.a, 0, 10);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:7]: (error) Buffer is accessed out of bounds: s.a\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:6]: (error) Buffer is accessed out of bounds: s.a\n", errout.str());
|
||||
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
checkstd("void f() {\n"
|
||||
" char str[5];\n"
|
||||
" memset(str, 0, 10);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
checkstd("void f() {\n"
|
||||
" char a[5], b[50];\n"
|
||||
" memcpy(a, b, 10);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: a\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: a\n", errout.str());
|
||||
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
checkstd("void f() {\n"
|
||||
" char a[5], b[50];\n"
|
||||
" memmove(a, b, 10);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: a\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: a\n", errout.str());
|
||||
|
||||
// Ticket #909
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
checkstd("void f() {\n"
|
||||
" char * pch;\n"
|
||||
" char str[] = \"Example string\";\n"
|
||||
" pch = memchr (str, 'p', 16);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:5]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str\n", errout.str());
|
||||
}
|
||||
|
||||
// ticket #2121 - buffer access out of bounds when using uint32_t
|
||||
void memfunc2() {
|
||||
check("void f()\n"
|
||||
"{\n"
|
||||
checkstd("void f() {\n"
|
||||
" unknown_type_t buf[4];\n"
|
||||
" memset(buf, 0, 100);\n"
|
||||
"}");
|
||||
|
|
@ -3208,21 +3216,21 @@ private:
|
|||
|
||||
// ticket #1659 - overflowing variable when using memcpy
|
||||
void memfunc3() {
|
||||
check("void f() { \n"
|
||||
"char str1[]=\"Sample string\";\n"
|
||||
"char str2;\n"
|
||||
"memcpy (&str2,str1,13);\n" // <-- strlen(str1)+1 = 13
|
||||
checkstd("void f() { \n"
|
||||
" char str1[]=\"Sample string\";\n"
|
||||
" char str2;\n"
|
||||
" memcpy (&str2,str1,13);\n" // <-- strlen(str1)+1 = 13
|
||||
"}");
|
||||
TODO_ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: str1\n","", errout.str());
|
||||
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char a[10];\n"
|
||||
" char str1[] = \"abcdef\";\n"
|
||||
" memset(a, 0, 11);\n" // <-- strlen(str1) + 5 = 11
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (error) Buffer is accessed out of bounds: a\n", errout.str());
|
||||
|
||||
check("void f() { \n"
|
||||
checkstd("void f() { \n"
|
||||
"char str1[]=\"Sample string\";\n"
|
||||
"char str2;\n"
|
||||
"memcpy (&str2,str1,15);\n" // <-- strlen(str1) + 1 = 15
|
||||
|
|
@ -3245,7 +3253,7 @@ private:
|
|||
|
||||
|
||||
void varid2() {
|
||||
check("void foo()\n"
|
||||
checkstd("void foo()\n"
|
||||
"{\n"
|
||||
" char str[10];\n"
|
||||
" if (str[0])\n"
|
||||
|
|
@ -3401,7 +3409,7 @@ private:
|
|||
}
|
||||
|
||||
void malloc_memset() {
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char *p = malloc(10);\n"
|
||||
" memset(p,0,100);\n"
|
||||
"}");
|
||||
|
|
@ -3409,18 +3417,18 @@ private:
|
|||
}
|
||||
|
||||
void memset1() {
|
||||
check("void foo()\n"
|
||||
checkstd("void foo()\n"
|
||||
"{\n"
|
||||
" char s[10];\n"
|
||||
" memset(s, 5, '*');\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:4]: (warning) The size argument is given as a char constant.\n", errout.str());
|
||||
|
||||
check("void foo()\n"
|
||||
checkstd("void foo()\n"
|
||||
"{\n"
|
||||
" int* x[5];\n"
|
||||
" memset(x, 0, sizeof(x));\n"
|
||||
"}",false,"test.cpp",false);
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
}
|
||||
|
||||
|
|
@ -3514,33 +3522,32 @@ private:
|
|||
}
|
||||
|
||||
void strncpy1() {
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char c[7];\n"
|
||||
" strncpy(c, \"hello\", 7);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char c[6];\n"
|
||||
" strncpy(c,\"hello\",6);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char c[5];\n"
|
||||
" strncpy(c,\"hello\",6);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: c\n", errout.str());
|
||||
|
||||
check("void f() {\n"
|
||||
checkstd("void f() {\n"
|
||||
" char c[6];\n"
|
||||
" strncpy(c,\"hello!\",7);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer is accessed out of bounds: c\n", errout.str());
|
||||
|
||||
check("struct AB { char a[10]; };\n"
|
||||
"void foo(AB *ab)\n"
|
||||
"{\n"
|
||||
checkstd("struct AB { char a[10]; };\n"
|
||||
"void foo(AB *ab) {\n"
|
||||
" strncpy(x, ab->a, 100);\n"
|
||||
"}");
|
||||
ASSERT_EQUALS("", errout.str());
|
||||
|
|
|
|||
|
|
@ -34,6 +34,7 @@ private:
|
|||
TEST_CASE(function_arg);
|
||||
TEST_CASE(function_arg_any);
|
||||
TEST_CASE(function_arg_valid);
|
||||
TEST_CASE(function_arg_minsize);
|
||||
TEST_CASE(memory);
|
||||
TEST_CASE(memory2); // define extra "free" allocation functions
|
||||
TEST_CASE(resource);
|
||||
|
|
@ -158,6 +159,41 @@ private:
|
|||
ASSERT_EQUALS(false, library.isargvalid("foo", 5, 2));
|
||||
}
|
||||
|
||||
void function_arg_minsize() const {
|
||||
const char xmldata[] = "<?xml version=\"1.0\"?>\n"
|
||||
"<def>\n"
|
||||
" <function name=\"foo\">\n"
|
||||
" <arg nr=\"1\"><minsize type=\"strlen\" arg=\"2\"/></arg>\n"
|
||||
" <arg nr=\"2\"><minsize type=\"argvalue\" arg=\"3\"/></arg>\n"
|
||||
" </function>\n"
|
||||
"</def>";
|
||||
tinyxml2::XMLDocument doc;
|
||||
doc.Parse(xmldata, sizeof(xmldata));
|
||||
|
||||
Library library;
|
||||
library.load(doc);
|
||||
|
||||
// arg1: type=strlen arg2
|
||||
const std::list<Library::ArgumentChecks::MinSize> *minsizes = library.argminsizes("foo",1);
|
||||
ASSERT_EQUALS(true, minsizes != nullptr);
|
||||
ASSERT_EQUALS(1U, minsizes ? minsizes->size() : 1U);
|
||||
if (minsizes && minsizes->size() == 1U) {
|
||||
const Library::ArgumentChecks::MinSize &m = minsizes->front();
|
||||
ASSERT_EQUALS(Library::ArgumentChecks::MinSize::Type::STRLEN, m.type);
|
||||
ASSERT_EQUALS(2, m.arg);
|
||||
}
|
||||
|
||||
// arg2: type=argvalue arg3
|
||||
minsizes = library.argminsizes("foo", 2);
|
||||
ASSERT_EQUALS(true, minsizes != nullptr);
|
||||
ASSERT_EQUALS(1U, minsizes ? minsizes->size() : 1U);
|
||||
if (minsizes && minsizes->size() == 1U) {
|
||||
const Library::ArgumentChecks::MinSize &m = minsizes->front();
|
||||
ASSERT_EQUALS(Library::ArgumentChecks::MinSize::Type::ARGVALUE, m.type);
|
||||
ASSERT_EQUALS(3, m.arg);
|
||||
}
|
||||
}
|
||||
|
||||
void memory() const {
|
||||
const char xmldata[] = "<?xml version=\"1.0\"?>\n"
|
||||
"<def>\n"
|
||||
|
|
|
|||
Loading…
Reference in New Issue