From 20c69077d1ce197cb6cf7f1bf8f581fb98607b71 Mon Sep 17 00:00:00 2001
From: "W. Felix Handte" <w@felixhandte.com>
Date: Wed, 11 Sep 2019 17:03:09 -0400
Subject: [PATCH] Shrink Table Valid End During Alloc Alignment / Phase Change

---
 lib/compress/zstd_cwksp.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/compress/zstd_cwksp.h b/lib/compress/zstd_cwksp.h
index 98499b86..39d064c4 100644
--- a/lib/compress/zstd_cwksp.h
+++ b/lib/compress/zstd_cwksp.h
@@ -184,6 +184,9 @@ MEM_STATIC void ZSTD_cwksp_internal_advance_phase(
              * by a larger margin than the space that will be consumed. */
             /* TODO: cleaner, compiler warning friendly way to do this??? */
             ws->allocStart = (BYTE*)ws->allocStart - ((size_t)ws->allocStart & (sizeof(U32)-1));
+            if (ws->allocStart < ws->tableValidEnd) {
+                ws->tableValidEnd = ws->allocStart;
+            }
         }
         ws->phase = phase;
     }