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Diffstat (limited to 'net/ipv6/mcast.c')
-rw-r--r--net/ipv6/mcast.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index c4f2a0ef748..f15e04ad026 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -545,8 +545,10 @@ int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
goto done;
}
- } else
+ } else {
newpsl = NULL;
+ (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
+ }
psl = pmc->sflist;
if (psl) {
(void) ip6_mc_del_src(idev, group, pmc->sfmode,
@@ -1087,7 +1089,7 @@ static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
int igmp6_event_query(struct sk_buff *skb)
{
- struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
+ struct mld2_query *mlh2 = NULL;
struct ifmcaddr6 *ma;
struct in6_addr *group;
unsigned long max_delay;
@@ -1140,6 +1142,13 @@ int igmp6_event_query(struct sk_buff *skb)
/* clear deleted report items */
mld_clear_delrec(idev);
} else if (len >= 28) {
+ int srcs_offset = sizeof(struct mld2_query) -
+ sizeof(struct icmp6hdr);
+ if (!pskb_may_pull(skb, srcs_offset)) {
+ in6_dev_put(idev);
+ return -EINVAL;
+ }
+ mlh2 = (struct mld2_query *) skb->h.raw;
max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
if (!max_delay)
max_delay = 1;
@@ -1156,7 +1165,15 @@ int igmp6_event_query(struct sk_buff *skb)
return 0;
}
/* mark sources to include, if group & source-specific */
- mark = mlh2->nsrcs != 0;
+ if (mlh2->nsrcs != 0) {
+ if (!pskb_may_pull(skb, srcs_offset +
+ mlh2->nsrcs * sizeof(struct in6_addr))) {
+ in6_dev_put(idev);
+ return -EINVAL;
+ }
+ mlh2 = (struct mld2_query *) skb->h.raw;
+ mark = 1;
+ }
} else {
in6_dev_put(idev);
return -EINVAL;