From 25353b3377d5a75d4b830477bb90a3691155de72 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Mon, 30 Jul 2012 14:42:49 -0700
Subject: taskstats: check nla_reserve() return

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=44621

Reported-by: <rucsoftsec@gmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/taskstats.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'kernel/taskstats.c')

diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index e66046456f4f..d0a32796550f 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -436,6 +436,11 @@ static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
 
 	na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS,
 				sizeof(struct cgroupstats));
+	if (na == NULL) {
+		rc = -EMSGSIZE;
+		goto err;
+	}
+
 	stats = nla_data(na);
 	memset(stats, 0, sizeof(*stats));
 
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