[PATCH 4.4 01/38] ah6: fix error return code in ah6_input()

[Greg Kroah-Hartman]

From: Zhang Changzhong <zhangchangzh...@huawei.com>

[ 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 <hul...@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzh...@huawei.com>
Link: 
https://lore.kernel.org/r/1605581105-35295-1-git-send-email-zhangchangzh...@huawei.com
Signed-off-by: Jakub Kicinski <k...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/ipv6/ah6.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -595,7 +595,8 @@ static int ah6_input(struct xfrm_state *
        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;