Author: brooks
Date: Wed Jan 13 21:50:08 2016
New Revision: 293856
URL: https://svnweb.freebsd.org/changeset/base/293856
Log:
Avoid reading pass the end of the source buffer when it is not NUL
terminated.
If this buffer is adjacent to an unmapped page or a version of C with
bounds checked is used this may result in a crash.
PR: 206178
Submitted by: Alexander Cherepanov <chere...@mccme.ru>
MFC after: 1 week
Modified:
head/lib/libc/string/wcslcat.c
Modified: head/lib/libc/string/wcslcat.c
==============================================================================
--- head/lib/libc/string/wcslcat.c Wed Jan 13 21:49:01 2016
(r293855)
+++ head/lib/libc/string/wcslcat.c Wed Jan 13 21:50:08 2016
(r293856)
@@ -54,7 +54,7 @@ wcslcat(wchar_t *dst, const wchar_t *src
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
- while (*d != '\0' && n-- != 0)
+ while (n-- != 0 && *d != '\0')
d++;
dlen = d - dst;
n = siz - dlen;
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