From 64bf8ffce64ea2f52beba03f6531a1c3001763c3 Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Fri, 27 Jan 2017 17:25:07 -0800
Subject: [PATCH] report @terrelln patch to ST fuzzer tests

---
 tests/zstreamtest.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tests/zstreamtest.c b/tests/zstreamtest.c
index e451535c4..0fdb1ee12 100644
--- a/tests/zstreamtest.c
+++ b/tests/zstreamtest.c
@@ -691,10 +691,13 @@ static int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compres
                 size_t const randomCSrcSize = FUZ_randomLength(&lseed, maxSampleLog);
                 size_t const randomDstSize = FUZ_randomLength(&lseed, maxSampleLog);
                 size_t const adjustedDstSize = MIN(dstBufferSize - outBuff.pos, randomDstSize);
+                size_t const adjustedCSrcSize = MIN(cSize - inBuff.pos, randomCSrcSize);
                 outBuff.size = outBuff.pos + adjustedDstSize;
-                inBuff.size  = inBuff.pos + randomCSrcSize;
+                inBuff.size  = inBuff.pos + adjustedCSrcSize;
                 {   size_t const decompressError = ZSTD_decompressStream(zd, &outBuff, &inBuff);
                     if (ZSTD_isError(decompressError)) break;   /* error correctly detected */
+                    /* No forward progress possible */
+                    if (outBuff.pos < outBuff.size && inBuff.pos == cSize) break;
     }   }   }   }
     DISPLAY("\r%u fuzzer tests completed   \n", testNb);