svn commit: r339806 - head/sys/net
Eugene Grosbein
eugen at FreeBSD.org
Sat Oct 27 04:45:29 UTC 2018
Author: eugen
Date: Sat Oct 27 04:45:28 2018
New Revision: 339806
URL: https://svnweb.freebsd.org/changeset/base/339806
Log:
Prevent stf(4) from panicing due to unprotected access to INADDR_HASH.
PR: 220078
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D12457
Tested-by: Cassiano Peixoto and others
Modified:
head/sys/net/if_stf.c
Modified: head/sys/net/if_stf.c
==============================================================================
--- head/sys/net/if_stf.c Sat Oct 27 04:10:42 2018 (r339805)
+++ head/sys/net/if_stf.c Sat Oct 27 04:45:28 2018 (r339806)
@@ -367,6 +367,7 @@ stf_encapcheck(const struct mbuf *m, int off, int prot
static int
stf_getsrcifa6(struct ifnet *ifp, struct in6_addr *addr, struct in6_addr *mask)
{
+ struct rm_priotracker in_ifa_tracker;
struct ifaddr *ia;
struct in_ifaddr *ia4;
struct in6_ifaddr *ia6;
@@ -382,9 +383,11 @@ stf_getsrcifa6(struct ifnet *ifp, struct in6_addr *add
continue;
bcopy(GET_V4(&sin6->sin6_addr), &in, sizeof(in));
+ IN_IFADDR_RLOCK(&in_ifa_tracker);
LIST_FOREACH(ia4, INADDR_HASH(in.s_addr), ia_hash)
if (ia4->ia_addr.sin_addr.s_addr == in.s_addr)
break;
+ IN_IFADDR_RUNLOCK(&in_ifa_tracker);
if (ia4 == NULL)
continue;
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