From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E29C11C695; Thu, 2 Jul 2026 16:54:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783011289; cv=none; b=CQYQH1F7FTQ/rSDgBryCVPKm3W4RYmz49NviaXpnFnhjmU9vVFQUJPz9gxoNcJWD7Q9d9aoskht9UOQCABlGQ3vFveknPkfNMQr7t6HSYn2JOpvoXMIwGUO7QPF1p+5gZoqrQ0o9Th773f8IpZzb0qbD9IdDDMkZoRH28qns3B8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783011289; c=relaxed/simple; bh=xkCYcodTQhvhhXGgwB02/DH9oh5ouwb0wg4xdhaEK+Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YMuQ4RaBh8l/Xd7OsUEd/tTk4XDr+onzROM+VM31RqPi2bBiWwTPOeyVDEriyzGJzqyI+iaXUtNemGYywJ0MeP1RAJBfKBsHmeHAOnqCWCCOM279cGYcBqPCt4Iw2ICdS7fclTD36vteaV1d61DP7f8OUhM34c6Gt+z/xxDCooY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DuXeXWo2; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DuXeXWo2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 557B01F00A3A; Thu, 2 Jul 2026 16:54:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783011288; bh=IuOUzgzScvvdwfXd7daJMkiVWTQHVeGB5d6oMF2SZzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DuXeXWo27MjvdJ1giZn0+TQPvMBgONLNZaKxsiC3+qu0Dp8TlWzZxyNgTPPpDSxGW q3aEZj19s+UVQ43WIyXBMfcT6GsLq7sFlsyXGfv13LdmKwcqZEUAadW7mXW6+mydnl PP1B8puzdwCCH1PLGwBtcU4Dt4IKYAl4fh5VWz5A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable@kernel.org, Sven Eckelmann , Sasha Levin Subject: [PATCH 6.18 008/108] batman-adv: tp_meter: initialize dec_cwnd explicitly Date: Thu, 2 Jul 2026 18:20:05 +0200 Message-ID: <20260702155112.285480420@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260702155112.110058792@linuxfoundation.org> References: <20260702155112.110058792@linuxfoundation.org> User-Agent: quilt/0.69 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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sven Eckelmann commit febfb1b86224489535312296ecfa3d4bf467f339 upstream. When batadv_tp_update_cwnd() is called, dec_cwnd is increased. But dec_cwnd is only initialixed (to 0) when a duplicate Ack was received or when cwnd is below the ss_threshold. Just initialize the cwnd during the initialization to avoid any potential access of uninitialized data. Cc: stable@kernel.org Fixes: 33a3bb4a3345 ("batman-adv: throughput meter implementation") Signed-off-by: Sven Eckelmann Signed-off-by: Sasha Levin --- net/batman-adv/tp_meter.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c index fe9a447643074a..473641d32dc683 100644 --- a/net/batman-adv/tp_meter.c +++ b/net/batman-adv/tp_meter.c @@ -1055,6 +1055,8 @@ void batadv_tp_start(struct batadv_priv *bat_priv, const u8 *dst, * mesh_interface, hence its MTU */ tp_vars->cwnd = BATADV_TP_PLEN * 3; + tp_vars->dec_cwnd = 0; + /* at the beginning initialise the SS threshold to the biggest possible * window size, hence the AWND size */ -- 2.53.0