rtsold: Fix a buffer leak if we fail to read the default router sysctl

MFC after:	1 week
Reported by:	Kevin Day <kevin@your.org>

This commit is contained in:

Mark Johnston

2025-12-04 15:00:46 +00:00

parent 0795e9b53c

commit 792221630b

1 changed files with 3 additions and 1 deletions

									
										usr.sbin/rtsold/cap_sendmsg.c
									
		+3
		-1
	
												View File
												
				@@ -151,8 +151,10 @@ probe_defrouters(uint32_t ifindex, uint32_t linkid)

					buf = malloc(len);

					if (buf == NULL)

						return (-1);

					if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) < 0)

					if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) < 0) {

						free(buf);

						return (-1);

					}

					ep = (struct in6_defrouter *)(void *)(buf + len);

					for (p = (struct in6_defrouter *)(void *)buf; p < ep; p++) {

						if (ifindex != p->if_index)