taskstats: cgroupstats_user_cmd() may leak on error
If prepare_reply() succeeds we have allocated memory for 'rep_skb'. If
nla_reserve() then subsequently fails and returns NULL we fail to release
the memory we allocated, thus causing a leak.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Cc: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 610f083..145bb4d 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -445,6 +445,7 @@
na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS,
sizeof(struct cgroupstats));
if (na == NULL) {
+ nlmsg_free(rep_skb);
rc = -EMSGSIZE;
goto err;
}