From: Navid Emamdoost <navid.emamdoost@gmail.com>
Date: Fri, 4 Oct 2019 14:34:54 -0500
Subject: [PATCH] crypto: user - fix memory leak in crypto_reportstat
Git-commit: c03b04dcdba1da39903e23cc4d072abf8f68f2dd
Patch-mainline: v5.5-rc1
References: CVE-2019-19050 bsc#1157336 git-fixes bnc#1151927 5.3.16

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: Oliver Neukum <oneukum@suse.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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);
 }