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 95DB93D9556; Thu, 2 Jul 2026 16:27:29 +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=1783009653; cv=none; b=HcITZuoYaeZvGi2v4aCrtYnUaqQyznJwncBcExUZaC9QHirAN5oNsri7XUyHfFLSKBfwYf+xSXoI7CzIoP9LiM1cXlh89wPNDDo1AaSbcLdvhdSWXFFnvUyErGcLDBjZSdsGLD9E4MA2WjzlG91qN7H+EpJDNUBr4ZaW1PkwiMQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783009653; c=relaxed/simple; bh=umVKHZE0b5OvUEn6b0994w4sdyrNFES69ExzdPtxqzc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cG04RiWifXz3bifx0h9STipll0oOPZJLG4yZryYqVEoXJLc2TaHX6naPoqYRfGTSMImubDRVQzpEdb6LMslyDYMSilGH53TdGVqhpC8IHKn6cUNphPARj4SUKvLCakLyWf6JFzaE7nTozSEQfhEbtqw7p33zndJ2xqQHb6/iIFE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tvDLO8v/; 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="tvDLO8v/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D44BA1F00A3D; Thu, 2 Jul 2026 16:27:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783009649; bh=slg9E5ph3Loq8Kzwpyi1vmRHkbSoxQoFMeMYmhU8fq8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=tvDLO8v/mpxVvM1ctv0/MzYEE0y1qYV+U3yCOWFNcin95qZEIPWOXekfXFTyxzxMC BQa94T7doFnvoG78CfdDp1r/CXeauSqmPY5uIb7gja2lSTfcsTInyW5fXlM4vox165 QZn8iNIHACT7EdzXBe77R5vGw+KSF+vNeuipIFZI= 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 34/95] batman-adv: tp_meter: handle seqno wrap-around for fast recovery detection Date: Thu, 2 Jul 2026 18:19:37 +0200 Message-ID: <20260702155109.924234565@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 f54c85ed42a1b27a516cf2a4728f5a612b799e07 upstream. The recover variable and the last_sent sequence number are initialized on purpose as a really high value which will wrap-around after the first 2000 bytes. The fast recovery precondition must therefore not use simple integer comparisons but use helpers which are aware of the sequence number wrap-arounds. 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, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c index 1fc8d6e6f99b30..7385cd02abf9f0 100644 --- a/net/batman-adv/tp_meter.c +++ b/net/batman-adv/tp_meter.c @@ -733,7 +733,7 @@ static void batadv_tp_recv_ack(struct batadv_priv *bat_priv, if (atomic_read(&tp_vars->dup_acks) != 3) goto out; - if (tp_vars->recover >= recv_ack) + if (!batadv_seq_before(tp_vars->recover, recv_ack)) goto out; /* if this is the third duplicate ACK do Fast Retransmit */ -- 2.53.0