ah6: fix error return code in ah6_input()

[ Upstream commit a5ebcbdf34b65fcc07f38eaf2d60563b42619a59 ]

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

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1605581105-35295-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 95835e8d99aa5eea333798073c5ea42dabbdfc20..1c5ecd07a43e16e45cc3af65add0c15211f8ad5c 100644 (file)
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -588,7 +588,8 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
        memcpy(auth_data, ah->auth_data, ahp->icv_trunc_len);
        memset(ah->auth_data, 0, ahp->icv_trunc_len);
 
-       if (ipv6_clear_mutable_options(ip6h, hdr_len, XFRM_POLICY_IN))
+       err = ipv6_clear_mutable_options(ip6h, hdr_len, XFRM_POLICY_IN);
+       if (err)
                goto out_free;
 
        ip6h->priority    = 0;