[3.16.y-ckt stable] Patch "isdn_ppp: Add checks for allocation failure in isdn_ppp_open()" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    isdn_ppp: Add checks for allocation failure in isdn_ppp_open()

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt20.

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

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

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>From 27815daa93fe87312469fb283be825d8108b305e Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben at decadent.org.uk>
Date: Sun, 1 Nov 2015 16:21:24 +0000
Subject: isdn_ppp: Add checks for allocation failure in isdn_ppp_open()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit 0baa57d8dc32db78369d8b5176ef56c5e2e18ab3 upstream.

Compile-tested only.

Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
Signed-off-by: David S. Miller <davem at davemloft.net>
Cc: Moritz Mühlenhoff <jmm at inutil.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/isdn/i4l/isdn_ppp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c
index 62f0688d45a5..29d1cc0b2bc4 100644
--- a/drivers/isdn/i4l/isdn_ppp.c
+++ b/drivers/isdn/i4l/isdn_ppp.c
@@ -301,6 +301,8 @@ isdn_ppp_open(int min, struct file *file)
 	is->compflags = 0;

 	is->reset = isdn_ppp_ccp_reset_alloc(is);
+	if (!is->reset)
+		return -ENOMEM;

 	is->lp = NULL;
 	is->mp_seqno = 0;       /* MP sequence number */
@@ -320,6 +322,10 @@ isdn_ppp_open(int min, struct file *file)
 	 * VJ header compression init
 	 */
 	is->slcomp = slhc_init(16, 16);	/* not necessary for 2. link in bundle */
+	if (!is->slcomp) {
+		isdn_ppp_ccp_reset_free(is);
+		return -ENOMEM;
+	}
 #endif
 #ifdef CONFIG_IPPP_FILTER
 	is->pass_filter = NULL;