[PATCH 4.19 234/243] crypto: user - fix memory leak in crypto_report

From: Greg Kroah-Hartman
Date: Wed Dec 11 2019 - 10:26:51 EST


From: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>

commit ffdde5932042600c6807d46c1550b28b0db6a3bc upstream.

In crypto_report, a new skb is created via nlmsg_new(). This skb should
be released if crypto_report_alg() fails.

Fixes: a38f7907b926 ("crypto: Add userspace configuration API")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Navid Emamdoost <navid.emamdoost@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -288,8 +288,10 @@ static int crypto_report(struct sk_buff
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);
}