Patch "inet_diag: fix possible overflow in inet_diag_dump_one_icsk()" has been added to the 3.14-stable tree

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This is a note to let you know that I've just added the patch titled

    inet_diag: fix possible overflow in inet_diag_dump_one_icsk()

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     inet_diag-fix-possible-overflow-in-inet_diag_dump_one_icsk.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Tue Mar 24 11:01:25 CET 2015
From: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Fri, 13 Mar 2015 09:49:59 -0700
Subject: inet_diag: fix possible overflow in inet_diag_dump_one_icsk()

From: Eric Dumazet <edumazet@xxxxxxxxxx>

[ Upstream commit c8e2c80d7ec00d020320f905822bf49c5ad85250 ]

inet_diag_dump_one_icsk() allocates too small skb.

Add inet_sk_attr_size() helper right before inet_sk_diag_fill()
so that it can be updated if/when new attributes are added.

iproute2/ss currently does not use this dump_one() interface,
this might explain nobody noticed this problem yet.

Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv4/inet_diag.c |   18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -71,6 +71,20 @@ static inline void inet_diag_unlock_hand
 	mutex_unlock(&inet_diag_table_mutex);
 }
 
+static size_t inet_sk_attr_size(void)
+{
+	return	  nla_total_size(sizeof(struct tcp_info))
+		+ nla_total_size(1) /* INET_DIAG_SHUTDOWN */
+		+ nla_total_size(1) /* INET_DIAG_TOS */
+		+ nla_total_size(1) /* INET_DIAG_TCLASS */
+		+ nla_total_size(sizeof(struct inet_diag_meminfo))
+		+ nla_total_size(sizeof(struct inet_diag_msg))
+		+ nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
+		+ nla_total_size(TCP_CA_NAME_MAX)
+		+ nla_total_size(sizeof(struct tcpvegas_info))
+		+ 64;
+}
+
 int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
 			      struct sk_buff *skb, struct inet_diag_req_v2 *req,
 			      struct user_namespace *user_ns,		      	
@@ -324,9 +338,7 @@ int inet_diag_dump_one_icsk(struct inet_
 	if (err)
 		goto out;
 
-	rep = nlmsg_new(sizeof(struct inet_diag_msg) +
-			sizeof(struct inet_diag_meminfo) +
-			sizeof(struct tcp_info) + 64, GFP_KERNEL);
+	rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
 	if (!rep) {
 		err = -ENOMEM;
 		goto out;


Patches currently in stable-queue which might be from edumazet@xxxxxxxxxx are

queue-3.14/tcp-make-connect-mem-charging-friendly.patch
queue-3.14/tcp-fix-tcp-fin-memory-accounting.patch
queue-3.14/inet_diag-fix-possible-overflow-in-inet_diag_dump_one_icsk.patch
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