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kern_descrip_test: Fix trivial buffer overrun with readlink(2)

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Reported by:	Coverity
CID:		1229965, 1229972
Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
Conrad Meyer 2016-05-12 03:44:29 +00:00
parent 96aec9a5e9
commit 079375d12b
1 changed files with 2 additions and 1 deletions
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3
tests/sys/kern/kern_descrip_test.c
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@ -27,6 +27,7 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
@ -170,7 +171,7 @@ ATF_TC_CLEANUP(kern_maxfiles__increase, tc)
char buf[80];
if ((n = readlink(VALUE, buf, sizeof(buf))) > 0) {
buf[n] = '\0';
buf[MIN((size_t)n, sizeof(buf) - 1)] = '\0';
if (sscanf(buf, "%d", &oldmaxfiles) == 1) {
oldlen = sizeof(oldmaxfiles);
(void) sysctlbyname("kern.maxfiles", NULL, 0,