From patchwork Wed Jan 22 09:28:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 233418 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=DATE_IN_PAST_03_06, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9830BC33CB6 for ; Wed, 22 Jan 2020 13:22:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F15E24692 for ; Wed, 22 Jan 2020 13:22:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579699358; bh=AZh0/pB0q2KopdriTAOIAUemGtq0gw/o3+IlVV507gY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WzPNeYFDDlu1hX3M3jIy5e17czxp67zdc9dSdQazfmQohaDQ3GdGAqvN+ZT43bwU8 nyL6jKYcDT5r1ZRAYhar8Gd3VtieSEIAtEWi7FG90rtWQuv7TJp8y0YdRxtMAe6WLd W6KamQuA9KJZgTDva/g+8Z5Z50SIlPgxJGPmv5C0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729451AbgAVNWa (ORCPT ); Wed, 22 Jan 2020 08:22:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:40144 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725827AbgAVNW3 (ORCPT ); Wed, 22 Jan 2020 08:22:29 -0500 Received: from localhost (unknown [84.241.205.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3C4E62468C; Wed, 22 Jan 2020 13:22:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579699348; bh=AZh0/pB0q2KopdriTAOIAUemGtq0gw/o3+IlVV507gY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WIh1oDvXENvYrBxG76Ga+z3qHERYu9PXPffYrT03s29qxFaIQkIAK5FIyvJTB1207 tlY3p8DFf7e9beD6LF3S8XZq3r9tgMGMwks6voBc3048KAx1vIJn5jOZPtLT8ozQlN 0vzjLp3AIIG/WxFHjOQRwALaDxc+g85onBODxtm8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, John Fastabend , Daniel Borkmann , Jakub Sitnicki , Jonathan Lemon Subject: [PATCH 5.4 110/222] bpf: Sockmap/tls, push write_space updates through ulp updates Date: Wed, 22 Jan 2020 10:28:16 +0100 Message-Id: <20200122092841.611847883@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200122092833.339495161@linuxfoundation.org> References: <20200122092833.339495161@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: John Fastabend commit 33bfe20dd7117dd81fd896a53f743a233e1ad64f upstream. When sockmap sock with TLS enabled is removed we cleanup bpf/psock state and call tcp_update_ulp() to push updates to TLS ULP on top. However, we don't push the write_space callback up and instead simply overwrite the op with the psock stored previous op. This may or may not be correct so to ensure we don't overwrite the TLS write space hook pass this field to the ULP and have it fixup the ctx. This completes a previous fix that pushed the ops through to the ULP but at the time missed doing this for write_space, presumably because write_space TLS hook was added around the same time. Fixes: 95fa145479fbc ("bpf: sockmap/tls, close can race with map free") Signed-off-by: John Fastabend Signed-off-by: Daniel Borkmann Reviewed-by: Jakub Sitnicki Acked-by: Jonathan Lemon Cc: stable@vger.kernel.org Link: https://lore.kernel.org/bpf/20200111061206.8028-4-john.fastabend@gmail.com Signed-off-by: Greg Kroah-Hartman --- include/linux/skmsg.h | 12 ++++++++---- include/net/tcp.h | 6 ++++-- net/ipv4/tcp_ulp.c | 6 ++++-- net/tls/tls_main.c | 10 +++++++--- 4 files changed, 23 insertions(+), 11 deletions(-) --- a/include/linux/skmsg.h +++ b/include/linux/skmsg.h @@ -355,17 +355,21 @@ static inline void sk_psock_restore_prot struct sk_psock *psock) { sk->sk_prot->unhash = psock->saved_unhash; - sk->sk_write_space = psock->saved_write_space; if (psock->sk_proto) { struct inet_connection_sock *icsk = inet_csk(sk); bool has_ulp = !!icsk->icsk_ulp_data; - if (has_ulp) - tcp_update_ulp(sk, psock->sk_proto); - else + if (has_ulp) { + tcp_update_ulp(sk, psock->sk_proto, + psock->saved_write_space); + } else { sk->sk_prot = psock->sk_proto; + sk->sk_write_space = psock->saved_write_space; + } psock->sk_proto = NULL; + } else { + sk->sk_write_space = psock->saved_write_space; } } --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -2132,7 +2132,8 @@ struct tcp_ulp_ops { /* initialize ulp */ int (*init)(struct sock *sk); /* update ulp */ - void (*update)(struct sock *sk, struct proto *p); + void (*update)(struct sock *sk, struct proto *p, + void (*write_space)(struct sock *sk)); /* cleanup ulp */ void (*release)(struct sock *sk); /* diagnostic */ @@ -2147,7 +2148,8 @@ void tcp_unregister_ulp(struct tcp_ulp_o int tcp_set_ulp(struct sock *sk, const char *name); void tcp_get_available_ulp(char *buf, size_t len); void tcp_cleanup_ulp(struct sock *sk); -void tcp_update_ulp(struct sock *sk, struct proto *p); +void tcp_update_ulp(struct sock *sk, struct proto *p, + void (*write_space)(struct sock *sk)); #define MODULE_ALIAS_TCP_ULP(name) \ __MODULE_INFO(alias, alias_userspace, name); \ --- a/net/ipv4/tcp_ulp.c +++ b/net/ipv4/tcp_ulp.c @@ -96,17 +96,19 @@ void tcp_get_available_ulp(char *buf, si rcu_read_unlock(); } -void tcp_update_ulp(struct sock *sk, struct proto *proto) +void tcp_update_ulp(struct sock *sk, struct proto *proto, + void (*write_space)(struct sock *sk)) { struct inet_connection_sock *icsk = inet_csk(sk); if (!icsk->icsk_ulp_ops) { + sk->sk_write_space = write_space; sk->sk_prot = proto; return; } if (icsk->icsk_ulp_ops->update) - icsk->icsk_ulp_ops->update(sk, proto); + icsk->icsk_ulp_ops->update(sk, proto, write_space); } void tcp_cleanup_ulp(struct sock *sk) --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -798,15 +798,19 @@ out: return rc; } -static void tls_update(struct sock *sk, struct proto *p) +static void tls_update(struct sock *sk, struct proto *p, + void (*write_space)(struct sock *sk)) { struct tls_context *ctx; ctx = tls_get_ctx(sk); - if (likely(ctx)) + if (likely(ctx)) { + ctx->sk_write_space = write_space; ctx->sk_proto = p; - else + } else { sk->sk_prot = p; + sk->sk_write_space = write_space; + } } static int tls_get_info(const struct sock *sk, struct sk_buff *skb)