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sctp: allow setting SCTP_SACK_IMMEDIATELY by the application

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[ Upstream commit 27f7ed2b11 ]

This patch extends commit b93d647174 ("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: b93d647174 ("sctp: implement the sender side for SACK-IMMEDIATELY extension")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marcelo Ricardo Leitner
2016-01-22 18:29:49 -02:00
committed by Greg Kroah-Hartman
parent cccf9f3785
commit 293c41f895
1 changed files with 2 additions and 0 deletions
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2
net/sctp/socket.c
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@@ -6640,6 +6640,7 @@ static int sctp_msghdr_parse(const struct msghdr *msg, sctp_cmsgs_t *cmsgs)
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 struct msghdr *msg, sctp_cmsgs_t *cmsgs)
if (cmsgs->sinfo->snd_flags &
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
SCTP_SACK_IMMEDIATELY |
SCTP_ABORT | SCTP_EOF))
return -EINVAL;
break;