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codeql/cpp/ql/src/Critical/OverflowCalculated.cpp at codeql-cli/v2.26.2 · github/codeql · GitHub
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codeql-cli/v2.26.2
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codeql
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ql
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OverflowCalculated.cpp
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codeql-cli/v2.26.2
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OverflowCalculated.cpp
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void
f
(
char
* string) {
//
wrong: allocates space for characters, but not zero terminator
char
* buf =
malloc
(
strlen
(string));
strcpy
(buf, string);
char
* buf_right =
malloc
(
strlen
(string) +
1
);
//
correct: includes the zero terminator
strcpy
(buf_right, string);
//
buf_right is now full
strcat
(buf_right, string);
//
wrong: appending would overflow the buffer
}
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