From nobody Fri Dec 19 19:15:50 2025 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 1FFF313F434; Wed, 13 Mar 2024 16:42:52 +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=1710348172; cv=none; b=bpNCEHqA00tTRviAozyDjyA9RghIZ7QKhO6TSrVkZcl9p9qGTKOmKHWsJmvwJ+6/Jc3JU+fX4yUw0MRGROutR314tRwKPjvePAQmcSqGN3JGfLOyqenqWLLhjPGuhR7jHhERHU8J6Ele8UR7WRWhZn01WUdv2SrqN+FHVkgSKsE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710348172; c=relaxed/simple; bh=A45mpmaNrioN7F+79MkqmOhHiGCPFpIHmheKJHJxoKk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FB54B8/GGy94w8f3bHkFGycBYLUbjcodKfCg2EErY5hv3VVfmIAWvw6laR08uncRiZvq9JIcRWX4WsloKgPaFD233+Ot+c1ghHHDWq3BLJ5I+w3vQUbLkVvHI3KfcvWNEHX/VRmTGFTIfZawO4Tx7hw2tvB3J9cJPlKdUthxa1U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lfqXwO05; 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="lfqXwO05" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D97FC433F1; Wed, 13 Mar 2024 16:42:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710348172; bh=A45mpmaNrioN7F+79MkqmOhHiGCPFpIHmheKJHJxoKk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lfqXwO051bFHCoDctVnN8PVdrDC7k/XGuOzap5bvsyAHCK2cGrrvY5Zhmh5LjZIiY Mlgl/JBfVJUlKVc0aBINOuNkqzGrM9plLqCxOfXuCGel3X6r5scptwu1Bp9SkjkcX5 vjiUq30pcb2sb4OeJaknx+0zxpWdIDVg1N5i8pGnprbJmvkHvNVfUvTs8xnoeYfA7p B16l2LOdw0FFlA0iRwmG9H1SfysFmVhiWANZ8A2gm4NO3R+EiQphYAsSJ8Jx+kbsQR HsII7QWsQHG2FMlo00WUKH+zAboN31oRafJurh0tBu/K8Fg1l8QRKLvqVjR3oolOIl geqrN8rdY2wxQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jason Xing , Paolo Abeni , Sasha Levin Subject: [PATCH 5.15 23/76] netrom: Fix a data-race around sysctl_netrom_transport_requested_window_size Date: Wed, 13 Mar 2024 12:41:30 -0400 Message-ID: <20240313164223.615640-24-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240313164223.615640-1-sashal@kernel.org> References: <20240313164223.615640-1-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/v5.x/stable-review/patch-5.15.152-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.15.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.15.152-rc1 X-KernelTest-Deadline: 2024-03-15T16:42+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 a2e706841488f474c06e9b33f71afc947fb3bf56 ] 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/af_netrom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index 76d66eb0de255..d780adf54e19e 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -462,7 +462,7 @@ static int nr_create(struct net *net, struct socket *so= ck, int protocol, msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_busy_delay)); nr->idle =3D msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); - nr->window =3D sysctl_netrom_transport_requested_window_size; + nr->window =3D READ_ONCE(sysctl_netrom_transport_requested_window_size); =20 nr->bpqext =3D 1; nr->state =3D NR_STATE_0; --=20 2.43.0