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 58E2B22D7B9; Thu, 2 Jul 2026 16:53:01 +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=1783011182; cv=none; b=lyTzbi7nZTGBkIox88n1m2+t7BEzJ/ztQCTmDQn89te9qF+up5dCX08TJnjlbxueen0/FZ0kwRS6lSAYHx2o3T+1xv6rEF0RCZsGTdnsKPQ16qhNCtINGdfIwMNiS9LmJ1Jh0s+W086sqH6kktoInw0NAPbtbv0pVRxw+ovbxQk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783011182; c=relaxed/simple; bh=zgGTI7UZ3wSq9V40yD7nN0ctMLO7HBqcQhqonrlARh8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BCbEQKkcbGdt12hhTHKwayT+mfKqk5O1C81qnZOek7N0wA9OCwmui1NbsniDYVrUNUF61eSytPoEjBAWRHFXlXNDwJWNqlOIBIYGMDX41OCyl5rn1a4Gjskv4sFnMHVRFhQvCYvqJgwwoHAWjjj2ejobILJmSRRRiQKfEfXunEk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YZ6IGtR/; 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="YZ6IGtR/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF1181F00A3A; Thu, 2 Jul 2026 16:53:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783011181; bh=XlZyYZ2NcRjlxRyAj0242JjbqEwPSYfAC851YLPmvfY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YZ6IGtR/aZWsAKROYQwTPLgWTOVl5CA+ClHanCj18ZpmLicXOpKIH8bmjkC3s2Y/k 8PjNzTc0mA+OCsrgcRdALfPNyBVwcfUfJMk0+NUgxCAsWgD1himdsenmPxFagMT0xg yzzsuarJAW4xYinZJj8gGCfxHHddUS4Q2F1lAUWo= 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 6.18 012/108] batman-adv: tp_meter: handle seqno wrap-around for fast recovery detection Date: Thu, 2 Jul 2026 18:20:09 +0200 Message-ID: <20260702155112.366659864@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 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 a85622267ba655..0ebfc4462b8f17 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