Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/lua-zlib-1.2/lua_zlib.c

FINAL RESULTS:

data/lua-zlib-1.2/lua_zlib.c:104:5:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
    char o_buffer[LZ_BUFFER_SIZE];
data/lua-zlib-1.2/lua_zlib.c:860:34:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    char*       cur     = (char*)memcpy(lua_newuserdata(L, count),
data/lua-zlib-1.2/lua_zlib.c:871:31:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
            lua_pushnumber(L, atoi(begin));
data/lua-zlib-1.2/lua_zlib.c:859:27:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
    int         count   = strlen(version) + 1;

ANALYSIS SUMMARY:

Hits = 4
Lines analyzed = 1295 in approximately 0.05 seconds (26286 lines/second)
Physical Source Lines of Code (SLOC) = 905
Hits@level = [0]   0 [1]   1 [2]   3 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]   4 [1+]   4 [2+]   3 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 4.41989 [1+] 4.41989 [2+] 3.31492 [3+]   0 [4+]   0 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.