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af_key: Fix memory leak in key_notify_policy.

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We leak the allocated out_skb in case
pfkey_xfrm_policy2msg() fails. Fix this
by freeing it on error.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Steffen Klassert 2018-01-10 09:33:26 +01:00
parent 374d1b5a81
commit 1e532d2b49
1 changed files with 3 additions and 1 deletions
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4
net/key/af_key.c
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@ -2202,8 +2202,10 @@ static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_ev
return PTR_ERR(out_skb); return PTR_ERR(out_skb);
err = pfkey_xfrm_policy2msg(out_skb, xp, dir); err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
if (err < 0) if (err < 0) {
kfree_skb(out_skb);
return err; return err;
}
out_hdr = (struct sadb_msg *) out_skb->data; out_hdr = (struct sadb_msg *) out_skb->data;
out_hdr->sadb_msg_version = PF_KEY_V2; out_hdr->sadb_msg_version = PF_KEY_V2;