598 lines
15 KiB
C++
598 lines
15 KiB
C++
/*
|
|
* Cppcheck - A tool for static C/C++ code analysis
|
|
* Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam,
|
|
* Leandro Penz, Kimmo Varis, Vesa Pikki
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/
|
|
*/
|
|
|
|
|
|
#include "../src/tokenize.h"
|
|
#include "../src/checkbufferoverrun.h"
|
|
#include "testsuite.h"
|
|
|
|
#include <sstream>
|
|
|
|
extern std::ostringstream errout;
|
|
|
|
class TestBufferOverrun : public TestFixture
|
|
{
|
|
public:
|
|
TestBufferOverrun() : TestFixture("TestBufferOverrun")
|
|
{ }
|
|
|
|
private:
|
|
|
|
|
|
|
|
void check(const char code[])
|
|
{
|
|
// Tokenize..
|
|
Tokenizer tokenizer;
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
// Assign variable ids
|
|
tokenizer.setVarId();
|
|
tokenizer.simplifyTokenList();
|
|
|
|
// Fill function list
|
|
tokenizer.fillFunctionList();
|
|
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
// Check for buffer overruns..
|
|
Settings settings;
|
|
settings._showAll = true;
|
|
CheckBufferOverrunClass checkBufferOverrun(&tokenizer, &settings, this);
|
|
checkBufferOverrun.bufferOverrun();
|
|
}
|
|
|
|
void run()
|
|
{
|
|
TEST_CASE(noerr1);
|
|
TEST_CASE(noerr2);
|
|
TEST_CASE(noerr3);
|
|
TEST_CASE(noerr4);
|
|
|
|
TEST_CASE(sizeof1);
|
|
TEST_CASE(sizeof2);
|
|
|
|
TEST_CASE(array_index_1);
|
|
TEST_CASE(array_index_2);
|
|
TEST_CASE(array_index_3);
|
|
TEST_CASE(array_index_4);
|
|
TEST_CASE(array_index_5);
|
|
TEST_CASE(array_index_6);
|
|
TEST_CASE(array_index_7);
|
|
TEST_CASE(array_index_8);
|
|
TEST_CASE(array_index_9);
|
|
TEST_CASE(array_index_10);
|
|
TEST_CASE(array_index_11);
|
|
TEST_CASE(array_index_12);
|
|
|
|
TEST_CASE(buffer_overrun_1);
|
|
TEST_CASE(buffer_overrun_2);
|
|
TEST_CASE(buffer_overrun_3);
|
|
|
|
TEST_CASE(sprintf1);
|
|
TEST_CASE(snprintf1);
|
|
TEST_CASE(snprintf2);
|
|
TEST_CASE(snprintf3);
|
|
TEST_CASE(snprintf4);
|
|
|
|
TEST_CASE(strncat1);
|
|
TEST_CASE(strncat2);
|
|
|
|
TEST_CASE(cin1);
|
|
|
|
TEST_CASE(varid1);
|
|
TEST_CASE(varid2);
|
|
|
|
TEST_CASE(assign1);
|
|
|
|
TEST_CASE(alloc); // Buffer allocated with new
|
|
|
|
TEST_CASE(memset1);
|
|
}
|
|
|
|
|
|
|
|
void noerr1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (ab)\n"
|
|
" {\n"
|
|
" char str[50];\n"
|
|
" }\n"
|
|
" if (ab)\n"
|
|
" {\n"
|
|
" char str[50];\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void noerr2()
|
|
{
|
|
check("void f1(char *str)\n"
|
|
"{\n"
|
|
" strcpy(buf,str);\n"
|
|
"}\n"
|
|
"void f2(char *str)\n"
|
|
"{\n"
|
|
" strcat(buf,str);\n"
|
|
"}\n"
|
|
"void f3(char *str)\n"
|
|
"{\n"
|
|
" sprintf(buf,\"%s\",str);\n"
|
|
"}\n"
|
|
"void f4(const char str[])\n"
|
|
"{\n"
|
|
" strcpy(buf, str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void noerr3()
|
|
{
|
|
check("static void f()\n"
|
|
"{\n"
|
|
" char data[1];\n"
|
|
" return abc.data[1];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void noerr4()
|
|
{
|
|
// The memory isn't read or written and therefore there is no error.
|
|
check("static void f()\n"
|
|
"{\n"
|
|
" char data[100];\n"
|
|
" const char *p = &data[100];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
void sizeof1()
|
|
{
|
|
check("static void f()\n"
|
|
"{\n"
|
|
" char data[10];\n"
|
|
" data[ sizeof(*data) ] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void sizeof2()
|
|
{
|
|
check("static void f()\n"
|
|
"{\n"
|
|
" char data[10];\n"
|
|
" data[ sizeof(data[0]) ] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
|
|
check("static void f()\n"
|
|
"{\n"
|
|
" int data[2];\n"
|
|
" data[ sizeof(data[0]) ] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
void array_index_1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[0x10];\n"
|
|
" str[15] = 0;\n"
|
|
" str[16] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char *str = new char[0x10];\n"
|
|
" str[15] = 0;\n"
|
|
" str[16] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_3()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" int val[50];\n"
|
|
" for (i = 0; i < 100; i++)\n"
|
|
" sum += val[i];\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: (all) Buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_4()
|
|
{
|
|
check("const int SIZE = 10;\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" int i[SIZE];\n"
|
|
" i[SIZE] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_5()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" int i[10];\n"
|
|
" i[ sizeof(i) - 1 ] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_6()
|
|
{
|
|
check("struct ABC\n"
|
|
"{\n"
|
|
" char str[10];\n"
|
|
"};\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" struct ABC abc;\n"
|
|
" abc.str[10] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:9]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_7()
|
|
{
|
|
check("struct ABC\n"
|
|
"{\n"
|
|
" char str[10];\n"
|
|
"};\n"
|
|
"\n"
|
|
"static void f(ABC *abc)\n"
|
|
"{\n"
|
|
" abc->str[10] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:8]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_8()
|
|
{
|
|
check("const int SIZE = 10;\n"
|
|
"\n"
|
|
"struct ABC\n"
|
|
"{\n"
|
|
" char str[SIZE];\n"
|
|
"};\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" struct ABC abc;\n"
|
|
" abc.str[SIZE] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:11]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
void array_index_9()
|
|
{
|
|
check("static void memclr( char *data )\n"
|
|
"{\n"
|
|
" data[10] = 0;\n"
|
|
"}\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
" memclr( str ); // ERROR\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:9] -> [test.cpp:3]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_10()
|
|
{
|
|
check("struct ABC\n"
|
|
"{\n"
|
|
" char str[10];\n"
|
|
"};\n"
|
|
"\n"
|
|
"static void memclr( char *data )\n"
|
|
"{\n"
|
|
" data[10] = 0;\n"
|
|
"}\n"
|
|
"\n"
|
|
"static void f(ABC *abc)\n"
|
|
"{\n"
|
|
" memclr(abc->str);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:13] -> [test.cpp:8]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_11()
|
|
{
|
|
check("class ABC\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" ABC();\n"
|
|
" char *str[10];\n"
|
|
" struct ABC *next;"
|
|
"};\n"
|
|
"\n"
|
|
"static void f()\n"
|
|
"{\n"
|
|
" for ( ABC *abc = abc1; abc; abc = abc->next() )\n"
|
|
" {\n"
|
|
" abc->str[10] = 0;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:12]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void array_index_12()
|
|
{
|
|
check("class Fred\n"
|
|
"{\n"
|
|
"private:\n"
|
|
" char str[10];\n"
|
|
"public:\n"
|
|
" Fred();\n"
|
|
"};\n"
|
|
"Fred::Fred()\n"
|
|
"{\n"
|
|
" str[10] = 0;\n"
|
|
"}\n");
|
|
std::string err(errout.str());
|
|
ASSERT_EQUALS(std::string("[test.cpp:10]: (all) Array index out of bounds\n"), err);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void buffer_overrun_1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[3];\n"
|
|
" strcpy(str, \"abc\");\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
|
|
void buffer_overrun_2()
|
|
{
|
|
check("struct ABC\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
"};\n"
|
|
"\n"
|
|
"static void f(ABC *abc)\n"
|
|
"{\n"
|
|
" strcpy( abc->str, \"abcdef\" );\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:8]: (all) Buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
|
|
void buffer_overrun_3()
|
|
{
|
|
check("int a[10];\n"
|
|
"\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" int i;\n"
|
|
" for (i = 0; i <= 10; ++i)\n"
|
|
" a[i] = 0;\n"
|
|
"}\n");
|
|
std::string err(errout.str());
|
|
ASSERT_EQUALS(std::string("[test.cpp:7]: (all) Buffer overrun\n"), err);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void sprintf1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[3];\n"
|
|
" sprintf(str, \"%s\", \"abc\");\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
void snprintf1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
" snprintf(str, 10, \"%s\", \"abc\");\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (error) snprintf size is out of bounds\n"), errout.str());
|
|
}
|
|
|
|
void snprintf2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
" snprintf(str, 5, \"%s\", \"abc\");\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void snprintf3()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
" snprintf(str, sizeof str, \"%s\", \"abc\");\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void snprintf4()
|
|
{
|
|
check("void f(int x)\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
" snprintf(str, 8 - x, \"abcdefghijkl\");\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
|
|
|
|
void strncat1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[16];\n"
|
|
" strncpy(str, a, 10);\n"
|
|
" strncat(str, b, 10);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: (all) Dangerous usage of strncat, possible buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
void strncat2()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[5];\n"
|
|
" strncat(str, a, 5);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Dangerous usage of strncat, possible buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
|
|
|
|
void cin1()
|
|
{
|
|
check("void f()\n"
|
|
"{\n"
|
|
" char str[10];\n"
|
|
" cin >> str;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Buffer overrun\n"), errout.str());
|
|
}
|
|
|
|
|
|
|
|
void varid1()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char str[10];\n"
|
|
" if (str[0])\n"
|
|
" {\n"
|
|
" char str[50];\n"
|
|
" str[30] = 0;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
|
|
void varid2()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char str[10];\n"
|
|
" if (str[0])\n"
|
|
" {\n"
|
|
" char str[50];\n"
|
|
" memset(str,0,50);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string(""), errout.str());
|
|
}
|
|
|
|
void assign1()
|
|
{
|
|
check("char str[3] = {'a', 'b', 'c'};\n"
|
|
"\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" str[3] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:5]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
|
|
void alloc()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *s = new char[10];\n"
|
|
" s[10] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Array index out of bounds\n"), errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char *s = malloc(10);\n"
|
|
" s[10] = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) Array index out of bounds\n"), errout.str());
|
|
}
|
|
|
|
|
|
void memset1()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" char s[10];\n"
|
|
" memset(s, 5, '*');\n"
|
|
"}\n");
|
|
ASSERT_EQUALS(std::string("[test.cpp:4]: (all) The size argument is given as a char constant\n"), errout.str());
|
|
}
|
|
};
|
|
|
|
REGISTER_TEST(TestBufferOverrun)
|
|
|
|
|