Author: brooks
Date: Wed Jan 13 21:49:01 2016
New Revision: 293855
URL: https://svnweb.freebsd.org/changeset/base/293855
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: 206177
Submitted by: Alexander Cherepanov <chere...@mccme.ru>
MFC after: 1 week
Modified:
head/lib/libc/string/wcsncat.c
Modified: head/lib/libc/string/wcsncat.c
==============================================================================
--- head/lib/libc/string/wcsncat.c Wed Jan 13 21:47:27 2016
(r293854)
+++ head/lib/libc/string/wcsncat.c Wed Jan 13 21:49:01 2016
(r293855)
@@ -48,7 +48,7 @@ wcsncat(wchar_t * __restrict s1, const w
p++;
q = p;
r = s2;
- while (*r && n) {
+ while (n && *r) {
*q++ = *r++;
n--;
}
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