Patch "irda: do not leak initialized list.dev to userspace" has been added to the 4.12-stable tree

Patch "irda: do not leak initialized list.dev to userspace" has been added to the 4.12-stable tree

[gregkh]

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

    irda: do not leak initialized list.dev to userspace

to the 4.12-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:
     irda-do-not-leak-initialized-list.dev-to-userspace.patch
and it can be found in the queue-4.12 subdirectory.

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


>From foo@baz Thu Aug 24 17:43:45 PDT 2017
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 17 Aug 2017 23:14:58 +0100
Subject: irda: do not leak initialized list.dev to userspace

From: Colin Ian King <colin.king@canonical.com>


[ Upstream commit b024d949a3c24255a7ef1a470420eb478949aa4c ]

list.dev has not been initialized and so the copy_to_user is copying
data from the stack back to user space which is a potential
information leak. Fix this ensuring all of list is initialized to
zero.

Detected by CoverityScan, CID#1357894 ("Uninitialized scalar variable")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/irda/af_irda.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -2225,7 +2225,7 @@ static int irda_getsockopt(struct socket
 {
 	struct sock *sk = sock->sk;
 	struct irda_sock *self = irda_sk(sk);
-	struct irda_device_list list;
+	struct irda_device_list list = { 0 };
 	struct irda_device_info *discoveries;
 	struct irda_ias_set *	ias_opt;	/* IAS get/query params */
 	struct ias_object *	ias_obj;	/* Object in IAS */


Patches currently in stable-queue which might be from colin.king@canonical.com are

queue-4.12/nfp-fix-infinite-loop-on-umapping-cleanup.patch
queue-4.12/irda-do-not-leak-initialized-list.dev-to-userspace.patch