From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dvalin.narfation.org (dvalin.narfation.org [213.160.73.56]) (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 5C8513E2AD1 for ; Fri, 26 Jun 2026 16:11:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.160.73.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782490269; cv=none; b=FfAhwOeFOAPfloMq3OcB9WnF8kDPvE5lCJIVDBqli4efDQmKfxjwSNP2gu/aOIvbZwpBT3xcqceoOS4RaZFEj3B34Uj+0YQKap5wsdzS3sUfeBeDp7GFks7XLxjsT3AnU1+oSpB3q0op05k6iFayMYW87j+IDludeIXVLHjcNTQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782490269; c=relaxed/simple; bh=S1+ec5TMThGvmLgwTJcOqpyfQ1hcJvhf9CuuqZxvT9o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tVPJGWBRdVlF6sGmWardpfH87q/1DSoeuRz2Q0Dfn5VwDoTtqCc0wkNNC/QS6Uba+EgFELXnshsdxKy9WjAzmvSkkGCz7+cEvNH6Qlb0Tkg+wynOy6/QuIhqcjnWznFebo4QgLxPo/SPWUllDE7x1en5wHppG3rN+Luz7+NGOGc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=narfation.org; spf=pass smtp.mailfrom=narfation.org; dkim=pass (1024-bit key) header.d=narfation.org header.i=@narfation.org header.b=AsSt5YuH; arc=none smtp.client-ip=213.160.73.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=narfation.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=narfation.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=narfation.org header.i=@narfation.org header.b="AsSt5YuH" Received: by dvalin.narfation.org (Postfix) id E8B8B203E0; Fri, 26 Jun 2026 16:11:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=narfation.org; s=20121; t=1782490267; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SZAYiWPqhapoVZRpaaMHYuNNlDaMSotzkapR6kMnFxU=; b=AsSt5YuHFZTm4uOk38PQOfYUjtSgvhrxe2m/v/o1QA0Rd/QPLSpMZsKX5jxFxe+0HUGWfi 9ndqWRBwCbmbCBRsUnH2Qfe2HRnMvYg/LAaUA/2B3L8ZYnynmRiL/Dxq4vl7vRUxeagUWl /ml21Nv5V047L5/YKImYNC1k4DFiv2A= From: Sven Eckelmann To: stable@vger.kernel.org Cc: Sven Eckelmann Subject: [PATCH 5.15 03/25] batman-adv: tp_meter: initialize dec_cwnd explicitly Date: Fri, 26 Jun 2026 18:10:42 +0200 Message-ID: <20260626161105.124113-4-sven@narfation.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260626161105.124113-1-sven@narfation.org> References: <20260626161105.124113-1-sven@narfation.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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 2b68eacd7bf51..f7b0ce3f8e2ae 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, * soft_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 */ -- 2.47.3