From 2038fb6f957cb3367117ba8c91f2372dd28753aa Mon Sep 17 00:00:00 2001 From: Xin Long Date: Wed, 3 Feb 2016 23:33:30 +0800 Subject: [PATCH] sctp: translate network order to host order when users get a hmacid [ Upstream commit 7a84bd46647ff181eb2659fdc99590e6f16e501d ] Commit ed5a377d87dc ("sctp: translate host order to network order when setting a hmacid") corrected the hmacid byte-order when setting a hmacid. but the same issue also exists on getting a hmacid. We fix it by changing hmacids to host order when users get them with getsockopt. Fixes: Commit ed5a377d87dc ("sctp: translate host order to network order when setting a hmacid") Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/sctp/socket.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 06a9cfb..be1489f 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -5542,6 +5542,7 @@ static int sctp_getsockopt_hmac_ident(struct sock *sk, int len, struct sctp_hmac_algo_param *hmacs; __u16 data_len = 0; u32 num_idents; + int i; if (!ep->auth_enable) return -EACCES; @@ -5559,8 +5560,12 @@ static int sctp_getsockopt_hmac_ident(struct sock *sk, int len, return -EFAULT; if (put_user(num_idents, &p->shmac_num_idents)) return -EFAULT; - if (copy_to_user(p->shmac_idents, hmacs->hmac_ids, data_len)) - return -EFAULT; + for (i = 0; i < num_idents; i++) { + __u16 hmacid = ntohs(hmacs->hmac_ids[i]); + + if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16))) + return -EFAULT; + } return 0; } -- 2.7.4