Date: Sat, 14 Mar 2009 14:06:46 -0700 From: Sam Leffler <sam@freebsd.org> To: Bruce Simpson <bms@incunabulum.net> Cc: current@freebsd.org, freebsd-net <net@freebsd.org> Subject: Re: IGMP+WiFi panic on recent kernel - in igmp_fasttimo() Message-ID: <49BC1C66.7030400@freebsd.org> In-Reply-To: <49BB0D3E.2020306@incunabulum.net> References: <1236937253.2282.0.camel@localhost> <49BAEA9F.8020302@incunabulum.net> <49BB0D3E.2020306@incunabulum.net>
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This patches avoids the crash. Not sure how ifma_protospec is supposed
to be handled so I'm not committing it.
Sam
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name="mcast.patch"
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filename="mcast.patch"
Index: in.c
===================================================================
--- in.c (revision 189750)
+++ in.c (working copy)
@@ -1040,7 +1040,8 @@
*/
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
- if (ifma->ifma_addr->sa_family != AF_INET)
+ if (ifma->ifma_addr->sa_family != AF_INET ||
+ ifma->ifma_protospec == NULL)
continue;
inm = (struct in_multi *)ifma->ifma_protospec;
LIST_INSERT_HEAD(&purgeinms, inm, inm_link);
Index: igmp.c
===================================================================
--- igmp.c (revision 189750)
+++ igmp.c (working copy)
@@ -623,7 +623,8 @@
if (igi->igi_version == IGMP_VERSION_3) {
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
- if (ifma->ifma_addr->sa_family != AF_INET)
+ if (ifma->ifma_addr->sa_family != AF_INET ||
+ ifma->ifma_protospec == NULL)
continue;
inm = (struct in_multi *)ifma->ifma_protospec;
if (inm->inm_state == IGMP_LEAVING_MEMBER) {
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