Author: gibbs
Date: Mon Apr 29 23:08:13 2013
New Revision: 250081
URL: http://svnweb.freebsd.org/changeset/base/250081
Log:
xenstore/xenstore.c:
Prevent access to invalid memory region when listing an empty
directory in the XenStore.
Reported by: Bei Guan
MFC after: 1 week
Modified:
head/sys/xen/xenstore/xenstore.c
Modified: head/sys/xen/xenstore/xenstore.c
==============================================================================
--- head/sys/xen/xenstore/xenstore.c Mon Apr 29 22:54:26 2013
(r250080)
+++ head/sys/xen/xenstore/xenstore.c Mon Apr 29 23:08:13 2013
(r250081)
@@ -307,7 +307,8 @@ split(char *strings, u_int len, u_int *n
const char **ret;
/* Protect against unterminated buffers. */
- strings[len - 1] = '\0';
+ if (len > 0)
+ strings[len - 1] = '\0';
/* Count the strings. */
*num = extract_strings(strings, /*dest*/NULL, len);
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