4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
[ Upstream commit 27f7ed2b11d42ab6d796e96533c2076ec220affc ]
This patch extends commit b93d6471748d ("sctp: implement the sender side
for SACK-IMMEDIATELY extension") as it didn't white list
SCTP_SACK_IMMEDIATELY on sctp_msghdr_parse(), causing it to be
understood as an invalid flag and returning -EINVAL to the application.
Note that the actual handling of the flag is already there in
sctp_datamsg_from_user().
https://tools.ietf.org/html/rfc7053#section-7
Fixes: b93d6471748d ("sctp: implement the sender side for SACK-IMMEDIATELY extension")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
Acked-by: Vlad Yasevich <vyasevich@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/sctp/socket.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -6640,6 +6640,7 @@ static int sctp_msghdr_parse(const struc
if (cmsgs->srinfo->sinfo_flags &
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
+ SCTP_SACK_IMMEDIATELY |
SCTP_ABORT | SCTP_EOF))
return -EINVAL;
break;
@@ -6663,6 +6664,7 @@ static int sctp_msghdr_parse(const struc
if (cmsgs->sinfo->snd_flags &
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
+ SCTP_SACK_IMMEDIATELY |
SCTP_ABORT | SCTP_EOF))
return -EINVAL;
break;
--
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