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[3.19.y-ckt,stable] Patch "sctp: translate network order to host order when users get a hmacid" has been added to the 3.19.y-ckt tree

Message ID 1457483267-27872-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa March 9, 2016, 12:27 a.m. UTC 
This is a note to let you know that I have just added a patch titled

    sctp: translate network order to host order when users get a hmacid

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt16.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

From fa70e7196f86c9ba72afc3428fb68af6c680a0ef Mon Sep 17 00:00:00 2001
From: Xin Long <lucien.xin@gmail.com>
Date: Wed, 3 Feb 2016 23:33:30 +0800
Subject: 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 <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 net/sctp/socket.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--
2.7.0
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Patch

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ffb97da..f777f1f 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -5562,6 +5562,7 @@  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;
@@ -5579,8 +5580,12 @@  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;
 }