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Avoid undefined negation behavior if windowBits is INT_MIN.

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This commit is contained in:
Mark Adler 2022-10-06 16:33:42 -07:00
parent 138c93cffb
commit a9e14e8541
2 changed files with 4 additions and 0 deletions
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2
deflate.c
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@ -279,6 +279,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
if (windowBits < 0) { /* suppress zlib wrapper */ if (windowBits < 0) { /* suppress zlib wrapper */
wrap = 0; wrap = 0;
if (windowBits < -15)
return Z_STREAM_ERROR;
windowBits = -windowBits; windowBits = -windowBits;
} }
#ifdef GZIP #ifdef GZIP

2
inflate.c
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@ -168,6 +168,8 @@ int windowBits;
/* extract wrap request from windowBits parameter */ /* extract wrap request from windowBits parameter */
if (windowBits < 0) { if (windowBits < 0) {
if (windowBits < -15)
return Z_STREAM_ERROR;
wrap = 0; wrap = 0;
windowBits = -windowBits; windowBits = -windowBits;
} }