esp4: fix error return code in esp_output()

[ Upstream commit 06848c10f720cbc20e3b784c0df24930b7304b93 ]

Fix to return a negative error code from the error handling
case instead of 0, as returned elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 3b4f0cd2e63edbd136683577873b288712a4b92a..4cfe34d4cc967a94ed15f2deef3d249d2429e846 100644 (file)
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -139,8 +139,6 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
 
        /* skb is pure payload to encrypt */
 
-       err = -ENOMEM;
-
        esp = x->data;
        aead = esp->aead;
        alen = crypto_aead_authsize(aead);
@@ -176,8 +174,10 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
        }
 
        tmp = esp_alloc_tmp(aead, nfrags + sglists, seqhilen);
-       if (!tmp)
+       if (!tmp) {
+               err = -ENOMEM;
                goto error;
+       }
 
        seqhi = esp_tmp_seqhi(tmp);
        iv = esp_tmp_iv(aead, tmp, seqhilen);