From f6e9c1c9191c8b9998e03cb15de8600a2a4b9188 Mon Sep 17 00:00:00 2001
From: Nick Clifton <nickc@redhat.com>
Date: Tue, 16 Mar 2021 14:43:17 +0000
Subject: [PATCH] Fix potentially undefined behaviour when computing a sha1
 value.

libiberty/
	* sha1.c (sha1_process_bytes): Use memmove in place of memcpy.
---
 libiberty/sha1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libiberty/sha1.c b/libiberty/sha1.c
index e3d7f86e351..7d15d48d11d 100644
--- a/libiberty/sha1.c
+++ b/libiberty/sha1.c
@@ -258,7 +258,7 @@ sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx)
 	{
 	  sha1_process_block (ctx->buffer, 64, ctx);
 	  left_over -= 64;
-	  memcpy (ctx->buffer, &ctx->buffer[16], left_over);
+	  memmove (ctx->buffer, &ctx->buffer[16], left_over);
 	}
       ctx->buflen = left_over;
     }