Author: melifaro
Date: Sat Jun 9 17:39:05 2012
New Revision: 236819
URL: http://svn.freebsd.org/changeset/base/236819
Log:
Validate IPv4 network mask being passed to ipfw kernel interface.
Incorrect mask can possibly be one of the reasons for kern/127209 existance.
Approved by: kib(mentor)
MFC after: 3 days
Modified:
head/sys/netinet/ipfw/ip_fw_table.c
Modified: head/sys/netinet/ipfw/ip_fw_table.c
==============================================================================
--- head/sys/netinet/ipfw/ip_fw_table.c Sat Jun 9 16:44:35 2012
(r236818)
+++ head/sys/netinet/ipfw/ip_fw_table.c Sat Jun 9 17:39:05 2012
(r236819)
@@ -153,6 +153,9 @@ ipfw_add_table_entry(struct ip_fw_chain
case IPFW_TABLE_CIDR:
if (plen == sizeof(in_addr_t)) {
#ifdef INET
+ /* IPv4 case */
+ if (mlen > 32)
+ return (EINVAL);
ent = malloc(sizeof(*ent), M_IPFW_TBL, M_WAITOK |
M_ZERO);
ent->value = value;
/* Set 'total' structure length */
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