diff options
| author | Daniel Borkmann <dborkman@redhat.com> | 2013-09-16 12:36:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-13 18:14:25 -0700 |
| commit | 6f4a38bf6dfeda68612299aaf7cb8f0e5f7e1245 (patch) | |
| tree | 595a51438bb431fa7f18ed9b7a034d20e34c2bcb /net | |
| parent | 63e80cdb250fe817e0d6dd101cb92f73d006de9a (diff) | |
net: sctp: rfc4443: do not report ICMP redirects to user space
[ Upstream commit 3f96a532113131d5a65ac9e00fc83cfa31b0295f ]
Adapt the same behaviour for SCTP as present in TCP for ICMP redirect
messages. For IPv6, RFC4443, section 2.4. says:
...
(e) An ICMPv6 error message MUST NOT be originated as a result of
receiving the following:
...
(e.2) An ICMPv6 redirect message [IPv6-DISC].
...
Therefore, do not report an error to user space, just invoke dst's redirect
callback and leave, same for IPv4 as done in TCP as well. The implication
w/o having this patch could be that the reception of such packets would
generate a poll notification and in worst case it could even tear down the
whole connection. Therefore, stop updating sk_err on redirects.
Reported-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Reported-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Suggested-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sctp/input.c | 3 | ||||
| -rw-r--r-- | net/sctp/ipv6.c | 2 |
2 files changed, 2 insertions, 3 deletions
diff --git a/net/sctp/input.c b/net/sctp/input.c index 3fa4d858c35a..68155e3a6253 100644 --- a/net/sctp/input.c +++ b/net/sctp/input.c @@ -648,8 +648,7 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info) break; case ICMP_REDIRECT: sctp_icmp_redirect(sk, transport, skb); - err = 0; - break; + /* Fall through to out_unlock. */ default: goto out_unlock; } diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index b9ff4f0f9007..547a461eef06 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -189,7 +189,7 @@ static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, break; case NDISC_REDIRECT: sctp_icmp_redirect(sk, transport, skb); - break; + goto out_unlock; default: break; } |