From ab0266a36271746cea957f9edefc2ccf78aa2074 Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Sat, 1 Feb 2025 17:09:32 -0800
Subject: Avoid use of memcpy() in inflate when areas can overlap.

---
 inflate.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'inflate.c')

diff --git a/inflate.c b/inflate.c
index 4feac09..76bb8b9 100644
--- a/inflate.c
+++ b/inflate.c
@@ -884,12 +884,12 @@ int ZEXPORT inflate(z_streamp strm, int flush) {
                 if (copy > have) copy = have;
                 if (copy > left) copy = left;
                 if (copy == 0) goto inf_leave;
-                zmemcpy(put, next, copy);
                 have -= copy;
-                next += copy;
                 left -= copy;
-                put += copy;
                 state->length -= copy;
+                do {
+                    *put++ = *next++;
+                } while (--copy);
                 break;
             }
             Tracev((stderr, "inflate:       stored end\n"));
-- 
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