From: Yann Collet <yann.collet.73@gmail.com>
Date: Fri, 1 Apr 2016 22:40:09 +0000 (+0200)
Subject: Fix : rare bugs when hashLog < min in bt mode
X-Git-Tag: v0.6.0^2~17^2~27^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40358d01aa0ddd94e92b2cb7d9a2bd04f0f51b73;p=thirdparty%2Fzstd.git

Fix : rare bugs when hashLog < min in bt mode
---

diff --git a/lib/zstd_compress.c b/lib/zstd_compress.c
index 31d81ea2a..65d7258d9 100644
--- a/lib/zstd_compress.c
+++ b/lib/zstd_compress.c
@@ -193,6 +193,7 @@ void ZSTD_adjustCParams(ZSTD_compressionParameters* params, U64 srcSize, size_t
         if (params->contentLog > maxContentLog) params->contentLog = maxContentLog; }   /* <= ZSTD_CONTENTLOG_MAX */
 
     if (params->windowLog  < ZSTD_WINDOWLOG_ABSOLUTEMIN) params->windowLog = ZSTD_WINDOWLOG_ABSOLUTEMIN;  /* required for frame header */
+    if ((params->hashLog  < ZSTD_HASHLOG_MIN) && ((U32)params->strategy >= (U32)ZSTD_btlazy2)) params->hashLog = ZSTD_HASHLOG_MIN;  /* required to ensure collision resistance in bt */
 }