From: Gilad Ben-Yossef Date: Mon, 16 Jan 2017 11:17:56 +0000 (+0200) Subject: IPsec: do not ignore crypto err in ah6 input X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=726282aa6bbe627b3876afc27f88172e37b1d01d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git IPsec: do not ignore crypto err in ah6 input ah6 input processing uses the asynchronous hash crypto API which supplies an error code as part of the operation completion but the error code was being ignored. Treat a crypto API error indication as a verification failure. While a crypto API reported error would almost certainly result in a memcpy of the digest failing anyway and thus the security risk seems minor, performing a memory compare on what might be uninitialized memory is wrong. Signed-off-by: Gilad Ben-Yossef Signed-off-by: Steffen Klassert --- diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c index 189eb10b742d..dda6035e3b84 100644 --- a/net/ipv6/ah6.c +++ b/net/ipv6/ah6.c @@ -474,6 +474,9 @@ static void ah6_input_done(struct crypto_async_request *base, int err) int hdr_len = skb_network_header_len(skb); int ah_hlen = (ah->hdrlen + 2) << 2; + if (err) + goto out; + work_iph = AH_SKB_CB(skb)->tmp; auth_data = ah_tmp_auth(work_iph, hdr_len); icv = ah_tmp_icv(ahp->ahash, auth_data, ahp->icv_trunc_len);