netdev - [PATCH bpf-next v7 1/6] bpf: Use ipv6_only_sock in bpf_tcp_gen

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 28 Apr 2022 18:38:28 +0300
From:   Maxim Mikityanskiy <maximmi@...dia.com>
To:     <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, <netdev@...r.kernel.org>
CC:     Tariq Toukan <tariqt@...dia.com>, Martin KaFai Lau <kafai@...com>,
        "Song Liu" <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Petar Penkov <ppenkov@...gle.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        "David Ahern" <dsahern@...nel.org>, Shuah Khan <shuah@...nel.org>,
        "Jesper Dangaard Brouer" <hawk@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        "Nick Desaulniers" <ndesaulniers@...gle.com>,
        Joe Stringer <joe@...ium.io>,
        "Florent Revest" <revest@...omium.org>,
        <linux-kselftest@...r.kernel.org>,
        Toke Høiland-Jørgensen <toke@...e.dk>,
        "Kumar Kartikeya Dwivedi" <memxor@...il.com>,
        Florian Westphal <fw@...len.de>, <pabeni@...hat.com>,
        Maxim Mikityanskiy <maximmi@...dia.com>
Subject: [PATCH bpf-next v7 1/6] bpf: Use ipv6_only_sock in bpf_tcp_gen_syncookie

Instead of querying the sk_ipv6only field directly, use the dedicated
ipv6_only_sock helper.

Signed-off-by: Maxim Mikityanskiy <maximmi@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Acked-by: John Fastabend <john.fastabend@...il.com>
Acked-by: Lorenz Bauer <lmb@...udflare.com>
Acked-by: Petar Penkov <ppenkov@...gle.com>
---
 net/core/filter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index 8847316ee20e..207a13db5c80 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -7099,7 +7099,7 @@ BPF_CALL_5(bpf_tcp_gen_syncookie, struct sock *, sk, void *, iph, u32, iph_len,
 	 */
 	switch (((struct iphdr *)iph)->version) {
 	case 4:
-		if (sk->sk_family == AF_INET6 && sk->sk_ipv6only)
+		if (sk->sk_family == AF_INET6 && ipv6_only_sock(sk))
 			return -EINVAL;
 
 		mss = tcp_v4_get_syncookie(sk, iph, th, &cookie);
-- 
2.30.2