From 790e38bc26c4db72a1905c51daaa502e48081616 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Thu, 19 Dec 2013 12:54:58 +0100 Subject: ipv6: move ip6_sk_accept_pmtu from generic pmtu update path to ipv6 one In commit 93b36cf3425b9b ("ipv6: support IPV6_PMTU_INTERFACE on sockets") I made a horrible mistake to add ip6_sk_accept_pmtu to the generic sctp_icmp_frag_needed path. This results in build warnings if IPv6 is disabled which were luckily caught by Fengguang's kbuild bot. But it also leads to a kernel panic IPv4 frag-needed packet is received. Reported-by: kbuild test robot Signed-off-by: Hannes Frederic Sowa Acked-by: Daniel Borkmann Signed-off-by: David S. Miller --- net/sctp/ipv6.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/sctp/ipv6.c') diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 317e13eb2c56..14191ab4165f 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -172,7 +172,8 @@ static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, switch (type) { case ICMPV6_PKT_TOOBIG: - sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); + if (ip6_sk_accept_pmtu(sk)) + sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); goto out_unlock; case ICMPV6_PARAMPROB: if (ICMPV6_UNK_NEXTHDR == code) { -- cgit v1.2.3