[PATCH 5.3 092/105] crypto: user - fix memory leak in crypto_reportstat

Greg Kroah-Hartman
2019-12-11T15:55:35Z

From: Navid Emamdoost <navid.emamdoost@gmail.com>

commit c03b04dcdba1da39903e23cc4d072abf8f68f2dd upstream.

In crypto_reportstat, a new skb is created by nlmsg_new(). This skb is
leaked if crypto_reportstat_alg() fails. Required release for skb is
added.

Fixes: cac5818c25d0 ("crypto: user - Implement a generic crypto statistics")
Cc: <stable@vger.kernel.org>
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
crypto/crypto_user_stat.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/crypto/crypto_user_stat.c
+++ b/crypto/crypto_user_stat.c
@@ -326,8 +326,10 @@ int crypto_reportstat(struct sk_buff *in
drop_alg:
crypto_mod_put(alg);

- if (err)
+ if (err) {
+ kfree_skb(skb);
return err;
+ }

return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
}