From f76107ce0d5be6d505aebf8e1491ae68c76464f0 Mon Sep 17 00:00:00 2001 From: Jeremy Sowden Date: Sat, 25 May 2019 19:09:35 +0100 Subject: [PATCH] af_key: fix leaks in key_pol_get_resp and dump_sp. [ Upstream commit 7c80eb1c7e2b8420477fbc998971d62a648035d9 ] In both functions, if pfkey_xfrm_policy2msg failed we leaked the newly allocated sk_buff. Free it on error. Fixes: 55569ce256ce ("Fix conversion between IPSEC_MODE_xxx and XFRM_MODE_xxx.") Reported-by: syzbot+4f0529365f7f2208d9f0@syzkaller.appspotmail.com Signed-off-by: Jeremy Sowden Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/key/af_key.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/net/key/af_key.c b/net/key/af_key.c index 3ba903f..36db179 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -2463,8 +2463,10 @@ 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; @@ -2717,8 +2719,10 @@ 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; -- 2.7.4