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 1F5FC39B979; Thu, 2 Jul 2026 16:27:19 +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=1783009641; cv=none; b=iT9o+dtQeKXZnB+yEj8WnQEG4pUiVCBTNeoK96as8FlGxval5+uoPhgDRfcPpzF69StTKDoWbr0MYXR4MnkGO/CT+xIauAfRMNmL4dXqwO8uocgWF4wVQsXfim49wlsCXSvJ8ttYSDEgAq2ACQnceQgYTS5QsdzjPF9QHIpje1s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783009641; c=relaxed/simple; bh=gXFd/3ac2OOUc8UWMKW/XAMAKIMWzgV/WapfFYhBml8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nznGykeiZiZLmN/huvbhOGhwIXdxR4RESd2uJ/lmFzdr6SBTtFWxQfSjsyeFIKo3LDcrsN6lFCUAWqoZMtr//YPEBXOdlGC1CZ4NtFYBVjA6yTjwAEyGGsBQuoxKDOCs48fm/20SUVn5Le0edX03JTFm7YY7+rs3D2EYq7y42CU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YstgVPhF; 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="YstgVPhF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 682C31F00A3A; Thu, 2 Jul 2026 16:27:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783009638; bh=HdwpBGIV7oocolMPOCvwpTxbuOXE/EVet3+ZRJgngms=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YstgVPhFtgbOQCHvNoelefkLr7Shrcy2AAEYRS/ULI0SIrjEkpVks3Z2hX1LIejgg wV77wFs1+vuQqTn0xB2HkEUybwP4KlWvMnJilJF0DsX/Rh5vSBZKpx3OKRT2cSMM11 iPxOhxRGEssQGwBpMtmtWesv1utYsmsX2V9AwpeY= 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 5.15 30/95] batman-adv: tp_meter: initialize dec_cwnd explicitly Date: Thu, 2 Jul 2026 18:19:33 +0200 Message-ID: <20260702155109.842254079@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260702155109.196223802@linuxfoundation.org> References: <20260702155109.196223802@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 5.15-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 2b68eacd7bf51d..f7b0ce3f8e2aef 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 */ -- 2.53.0