From: Chenghai Huang <huangchenghai2@huawei.com> The windowsize is incorrectly calculated. For example, when the user input -14 to configure a 16 KB window size, *windowsize should be WD_COMP_WS_16KB. Signed-off-by: Chenghai Huang <huangchenghai2@huawei.com> Signed-off-by: Qi Tao <taoqi10@huawei.com> --- wd_zlibwrapper.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/wd_zlibwrapper.c b/wd_zlibwrapper.c index 6effd6a4..4aa070c2 100644 --- a/wd_zlibwrapper.c +++ b/wd_zlibwrapper.c @@ -86,7 +86,7 @@ static int wd_zlib_analy_alg(int windowbits, int *alg, int *windowsize) static const int DEFLATE_MIN_WBITS = -15; static const int WBINS_ZLIB_4K = 12; static const int WBINS_GZIP_4K = 27; - static const int WBINS_DEFLATE_4K = -12; + static const int WBINS_DEFLATE_4K = 12; if ((windowbits >= ZLIB_MIN_WBITS) && (windowbits <= ZLIB_MAX_WBITS)) { *alg = WD_ZLIB; @@ -96,6 +96,7 @@ static int wd_zlib_analy_alg(int windowbits, int *alg, int *windowsize) *windowsize = max(windowbits - WBINS_GZIP_4K, WD_COMP_WS_4K); } else if ((windowbits >= DEFLATE_MIN_WBITS) && (windowbits <= DEFLATE_MAX_WBITS)) { *alg = WD_DEFLATE; + windowbits = -windowbits; *windowsize = max(windowbits - WBINS_DEFLATE_4K, WD_COMP_WS_4K); } else { return Z_STREAM_ERROR; -- 2.33.0