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authorXin Long <lucien.xin@gmail.com>2017-11-25 21:05:36 +0800
committerDavid S. Miller <davem@davemloft.net>2017-11-28 00:38:45 +0900
commit52a395896a051a3d5c34fba67c324f69ec5e67c6 (patch)
tree43ba6d5322c022f3cc0477820f59d3017fbaf76a /net
parent159f2a7456c6ae95c1e1a58e8b8ec65ef12d51cf (diff)
downloadop-kernel-dev-52a395896a051a3d5c34fba67c324f69ec5e67c6.zip
op-kernel-dev-52a395896a051a3d5c34fba67c324f69ec5e67c6.tar.gz
sctp: set sender next_tsn for the old result with ctsn_ack_point plus 1
When doing asoc reset, if the sender of the response has already sent some chunk and increased asoc->next_tsn before the duplicate request comes, the response will use the old result with an incorrect sender next_tsn. Better than asoc->next_tsn, asoc->ctsn_ack_point can't be changed after the sender of the response has performed the asoc reset and before the peer has confirmed it, and it's value is still asoc->next_tsn original value minus 1. This patch sets sender next_tsn for the old result with ctsn_ack_point plus 1 when processing the duplicate request, to make sure the sender next_tsn value peer gets will be always right. Fixes: 692787cef651 ("sctp: implement receiver-side procedures for the SSN/TSN Reset Request Parameter") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/stream.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index 9dd5bfe..a20145b 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -725,7 +725,7 @@ struct sctp_chunk *sctp_process_strreset_tsnreq(
i = asoc->strreset_inseq - request_seq - 1;
result = asoc->strreset_result[i];
if (result == SCTP_STRRESET_PERFORMED) {
- next_tsn = asoc->next_tsn;
+ next_tsn = asoc->ctsn_ack_point + 1;
init_tsn =
sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map) + 1;
}
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