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authorXin Long <lucien.xin@gmail.com>2017-02-03 12:37:06 +0300
committerDavid S. Miller <davem@davemloft.net>2017-02-06 19:57:15 +0300
commitd15c9ede6123dbce14c17eb9ced229e488002735 (patch)
treed887e8b7b88852113924a35bf7025a6eb06ff5bc /net/sctp
parent3bc32d0396d2a7214cb1d758df129bb781f7aa14 (diff)
downloadlinux-d15c9ede6123dbce14c17eb9ced229e488002735.tar.xz
sctp: process fwd tsn chunk only when prsctp is enabled
This patch is to check if asoc->peer.prsctp_capable is set before processing fwd tsn chunk, if not, it will return an ERROR to the peer, just as rfc3758 section 3.3.1 demands. Reported-by: Julian Cordes <julian.cordes@gmail.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/sm_statefuns.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 782e579472c9..d8798ddda726 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3867,6 +3867,9 @@ sctp_disposition_t sctp_sf_eat_fwd_tsn(struct net *net,
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
+ if (!asoc->peer.prsctp_capable)
+ return sctp_sf_unk_chunk(net, ep, asoc, type, arg, commands);
+
/* Make sure that the FORWARD_TSN chunk has valid length. */
if (!sctp_chunk_length_valid(chunk, sizeof(struct sctp_fwdtsn_chunk)))
return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
@@ -3935,6 +3938,9 @@ sctp_disposition_t sctp_sf_eat_fwd_tsn_fast(
return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
}
+ if (!asoc->peer.prsctp_capable)
+ return sctp_sf_unk_chunk(net, ep, asoc, type, arg, commands);
+
/* Make sure that the FORWARD_TSN chunk has a valid length. */
if (!sctp_chunk_length_valid(chunk, sizeof(struct sctp_fwdtsn_chunk)))
return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,