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af_key: fix leaks in key_pol_get_resp and dump_sp. 

In both functions, if pfkey_xfrm_policy2msg failed we leaked the newly
allocated sk_buff.  Free it on error.

Fixes: 55569ce256 ("Fix conversion between IPSEC_MODE_xxx and XFRM_MODE_xxx.")
Reported-by: syzbot+4f0529365f7f2208d9f0@syzkaller.appspotmail.com
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Jeremy Sowden 2019-05-25 19:09:35 +01:00 committed by Steffen Klassert
parent b38ff4075a
commit 7c80eb1c7e
1 changed files with 6 additions and 2 deletions
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8
net/key/af_key.c
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@ -2442,8 +2442,10 @@ static int key_pol_get_resp(struct sock *sk, struct xfrm_policy *xp, const struc
goto out;
}
err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
if (err < 0)
if (err < 0) {
kfree_skb(out_skb);
goto out;
}
out_hdr = (struct sadb_msg *) out_skb->data;
out_hdr->sadb_msg_version = hdr->sadb_msg_version;
@ -2694,8 +2696,10 @@ static int dump_sp(struct xfrm_policy *xp, int dir, int count, void *ptr)
return PTR_ERR(out_skb);
err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
if (err < 0)
if (err < 0) {
kfree_skb(out_skb);
return err;
}
out_hdr = (struct sadb_msg *) out_skb->data;
out_hdr->sadb_msg_version = pfk->dump.msg_version;