Copying data to a buffer that is not large enough to hold that data results in a buffer overflow. Buffer overflows are not limited to null-terminated byte strings (NTBS), but they often occur when manipulating NTBS data. To prevent such errors, either limit copies through truncation or, preferably, ensure that the destination is of sufficient size to hold the character data to be copied and the null-termination character. (See STR03-C. Do not inadvertently truncate a null-terminated byte string.)
Because strings are represented as arrays of characters, this rule is an instance of both ARR30-C. Do not form or use out of bounds pointers or array subscripts and ARR38-C. Guarantee that library functions do not form invalid pointers.
Noncompliant Code Example (Off-by-One Error)
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