From nobody Mon Feb 9 12:01:48 2026 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 A246F65BC2; Wed, 13 Mar 2024 16:33:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710347633; cv=none; b=tWMm/a9urlgEJpBDagx9Rlz/fgLCJOUm9os8ijFi3mykf2Yn/Ck+cbybWQO+cIG8zFISjzYKVJtq8uo67HFGY+yPUvX1Cf03zXEDjXWp4aiQYh2/PawTMI2Qdw88wLn4MTMfkqup8es3WJI/xGLOuprFpxKuZisFowNkajrlZxs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710347633; c=relaxed/simple; bh=3AWhKptyhC8XfLyB3pmytWkHsxrKPkwi3z7ElI2NOhs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dMGdHIf6eDCAwfLdZiz/Ck5xdI5LATGQsIAYxPS250FVdoSzy9G/Sj3WkNlj89gkAZA6GBZIlUrPXLwDLPF62bDMkb8sGypNKPF3ZKpl8Mdww5uc5j9ki1KptwmCmay4PvgXd37hDGv0eWmgkWxCQ5Rbt/xVmdmxoFShjom9oKk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M7savGLo; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="M7savGLo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 732F6C433F1; Wed, 13 Mar 2024 16:33:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710347633; bh=3AWhKptyhC8XfLyB3pmytWkHsxrKPkwi3z7ElI2NOhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M7savGLowgeTPa2bGzBQRcS7lnAUHGWfEt3JuQG0fgq7J+OBumHs9BHABd/AcSiv7 ANd12l6gxtcbD2/8ump56w3t2Xa0NdI1ur7RA6WY1Mk4x3mrbuKqgGohGucXrP6eBs RSlxXJAhH6OSD5z0vOU+veBXsjs2BTMdKu27brXKR4bvCV1lzETR6LTHYyKmBq3Lv3 4Qo0TUDkYc0R33xf2KAfezd/gzok3Ww4gQ0aZ5Nnx+uTCdmCUR4sooRNMLHgj3daD0 6vXohQO6U73mcc41dc/Ll/kcZHN13bPoNktekW793i9Ybo9e+xQHxkIZ2aGRItkuGg GVsBgxNR5bPCA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jason Xing , Paolo Abeni , Sasha Levin Subject: [PATCH 6.7 52/61] netrom: Fix a data-race around sysctl_netrom_routing_control Date: Wed, 13 Mar 2024 12:32:27 -0400 Message-ID: <20240313163236.613880-53-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240313163236.613880-1-sashal@kernel.org> References: <20240313163236.613880-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.7.10-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-6.7.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 6.7.10-rc1 X-KernelTest-Deadline: 2024-03-15T16:32+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Jason Xing [ Upstream commit b5dffcb8f71bdd02a4e5799985b51b12f4eeaf76 ] We need to protect the reader reading the sysctl value because the value can be changed concurrently. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jason Xing Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- net/netrom/nr_route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c index b8ddd8048f352..89e12e6eea2ef 100644 --- a/net/netrom/nr_route.c +++ b/net/netrom/nr_route.c @@ -780,7 +780,7 @@ int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25) return ret; } =20 - if (!sysctl_netrom_routing_control && ax25 !=3D NULL) + if (!READ_ONCE(sysctl_netrom_routing_control) && ax25 !=3D NULL) return 0; =20 /* Its Time-To-Live has expired */ --=20 2.43.0