linux-kernel - [PATCH 2.6.32 02/42] isdn_ppp: Add checks for allocation failure in isdn_ppp

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Message-Id: <20160123141222.070816578@1wt.eu>
Date:	Sat, 23 Jan 2016 15:12:23 +0100
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Ben Hutchings <ben@...adent.org.uk>,
	"David S. Miller" <davem@...emloft.net>, Willy Tarreau <w@....eu>
Subject: [PATCH 2.6.32 02/42] isdn_ppp: Add checks for allocation failure in
 isdn_ppp_open()

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@...adent.org.uk>

commit 0baa57d8dc32db78369d8b5176ef56c5e2e18ab3 upstream.

Compile-tested only.

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Willy Tarreau <w@....eu>
---
 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 642d5aa..3fb3213 100644
--- a/drivers/isdn/i4l/isdn_ppp.c
+++ b/drivers/isdn/i4l/isdn_ppp.c
@@ -300,6 +300,8 @@ 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 */
@@ -319,6 +321,10 @@ 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;
-- 
1.7.12.2.21.g234cd45.dirty