From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AFCAD3BB2C for ; Wed, 15 Nov 2023 19:53:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="chNDZ7mc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 59F5EC433C7; Wed, 15 Nov 2023 19:53:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700078013; bh=+XhfOVYzItezVCC5d5L/zF2CHzsVWIIcgeQZU7YpbGo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=chNDZ7mcOfkpyWMCjlL/a74x7rj4eIaDEyr3SEmPwsRqxLrXNqUgK15ZJZDQ10QMe 6Tp78qooaWSQ97zAELr14/uil1ViMvXMmFAj4S45VdVcqSJwIcudMqO3F2oy1EBwp/ GMx22PzD9wkT0bOY+MZIVxK2zt9xCrhK+XbvalHg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Eric Dumazet , Willem de Bruijn , Paolo Abeni , Sasha Levin Subject: [PATCH 6.1 031/379] udp: add missing WRITE_ONCE() around up->encap_rcv Date: Wed, 15 Nov 2023 14:21:46 -0500 Message-ID: <20231115192647.001190635@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115192645.143643130@linuxfoundation.org> References: <20231115192645.143643130@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet [ Upstream commit 6d5a12eb91224d707f8691dccb40a5719fe5466d ] UDP_ENCAP_ESPINUDP_NON_IKE setsockopt() writes over up->encap_rcv while other cpus read it. Fixes: 067b207b281d ("[UDP]: Cleanup UDP encapsulation code") Signed-off-by: Eric Dumazet Reviewed-by: Willem de Bruijn Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- net/ipv4/udp.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index b2aa7777521f6..65abc92a81bd0 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2714,10 +2714,12 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname, case UDP_ENCAP_ESPINUDP_NON_IKE: #if IS_ENABLED(CONFIG_IPV6) if (sk->sk_family == AF_INET6) - up->encap_rcv = ipv6_stub->xfrm6_udp_encap_rcv; + WRITE_ONCE(up->encap_rcv, + ipv6_stub->xfrm6_udp_encap_rcv); else #endif - up->encap_rcv = xfrm4_udp_encap_rcv; + WRITE_ONCE(up->encap_rcv, + xfrm4_udp_encap_rcv); #endif fallthrough; case UDP_ENCAP_L2TPINUDP: -- 2.42.0