netdev - [PATCH v2] af_key: Fix heap information leak

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Message-ID: <20230209091648.GA5858@ubuntu>
Date:   Thu, 9 Feb 2023 01:16:48 -0800
From:   Hyunwoo Kim <v4bel@...ori.io>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        Sabrina Dubroca <sd@...asysnail.net>,
        steffen.klassert@...unet.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Cc:     v4bel@...ori.io, imv4bel@...il.com, netdev@...r.kernel.org
Subject: [PATCH v2] af_key: Fix heap information leak

Since x->encap of pfkey_msg2xfrm_state() is not
initialized to 0, kernel heap data can be leaked.

Fix with kzalloc() to prevent this.

Signed-off-by: Hyunwoo Kim <v4bel@...ori.io>
Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
---
 net/key/af_key.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/key/af_key.c b/net/key/af_key.c
index 2bdbcec781cd..a815f5ab4c49 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1261,7 +1261,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
 		const struct sadb_x_nat_t_type* n_type;
 		struct xfrm_encap_tmpl *natt;
 
-		x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
+		x->encap = kzalloc(sizeof(*x->encap), GFP_KERNEL);
 		if (!x->encap) {
 			err = -ENOMEM;
 			goto out;
-- 
2.25.1