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From 9d4c902c42b3fda368d7ea64bb9575c46228fa7f Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Tue, 29 Aug 2017 19:53:50 -0400
Subject: [PATCH 11/30] fix undefined behavior in memset due to missing
sequence points
patch by Pascal Cuoq.
---
src/string/memset.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/src/string/memset.c b/src/string/memset.c
index f438b073..5613a148 100644
--- a/src/string/memset.c
+++ b/src/string/memset.c
@@ -11,12 +11,16 @@ void *memset(void *dest, int c, size_t n)
* offsets are well-defined and in the dest region. */
if (!n) return dest;
- s[0] = s[n-1] = c;
+ s[0] = c;
+ s[n-1] = c;
if (n <= 2) return dest;
- s[1] = s[n-2] = c;
- s[2] = s[n-3] = c;
+ s[1] = c;
+ s[2] = c;
+ s[n-2] = c;
+ s[n-3] = c;
if (n <= 6) return dest;
- s[3] = s[n-4] = c;
+ s[3] = c;
+ s[n-4] = c;
if (n <= 8) return dest;
/* Advance pointer to align it at a 4-byte boundary,
--
2.13.3
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