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 851B733D6C0; Thu, 2 Jul 2026 16:29:59 +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=1783009802; cv=none; b=opZlGfEFYVPVjzlpPLyXDCy0UVTG0tX14tSMNo0mVkP2pnV3uau2otCW/VOWrrc0w+pmQAYHp0FMaYtHFFrHy76/kRgVyXSvJi9Tc53FB9ReMwsA1ZWtOsZ4HcseLoJvKHTuvIdt/TmajtyItkDWYbF/7o6vZAHTUJ2xeh5ae8M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783009802; c=relaxed/simple; bh=zEfdXiCh5b0TuABJukv7geoTso+GvOdK+LBZuJQZ0J4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Nvj6E7GFhEk9Ta8cpj0TqzaRP/r8WotXveyKmQgM5X7IJlcgd4v12WFat6GFSL9hAe1Tj/IdF+EzL+tiA1Gst8C8RGFVonU4Uueg1H35UvaX4ZqAq/ttxYbjPS9D4sKfeLbD72npo3Nsy8C/vqPb5gSh69PYoLw8rYqeMSJ5jXU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=KX9n1qFw; 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="KX9n1qFw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC4A51F00A3E; Thu, 2 Jul 2026 16:29:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1783009799; bh=IRWxuhIVdLumVAiFYXFEPLnkK8Xnjqi2Facie4olKcg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=KX9n1qFweVYiiJ6NmparT9hoph1qMkB4HflGxsArJd26ix/iKJXkLxvwJXoHvGOSH g4hlLC354cMucE2q2N9UJYFlWPpIhJVfJ0ntXU32ahDxfiIVuUGm/LpJIdwhoY8Heu 6muY+r1Wq6dBRq3FWLCaBcpcx16nI9k1HjCeh6sI= 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 48/95] batman-adv: tt: dont merge change entries with different VIDs Date: Thu, 2 Jul 2026 18:19:51 +0200 Message-ID: <20260702155110.219256549@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 f08e06c2d5c3e2434e7c773f2213f4a7dce6bc1e upstream. batadv_tt_local_event() merges/cancels events for the same client which would conflict or be duplicates. The matching of the queued events only compares the MAC address - the VLAN ID stored in each event is ignored. If a MAC would now appear on multiple VID, the two ADD change events (for VID 1 and VID 2) would be merged to a single vid event. The remote can therefore not calculate the correct TT table and desync. A full translation table exchange is required to recover from this state. A check of VID is therefore necessary to avoid such wrong merges/cancels. Cc: stable@kernel.org Fixes: c018ad3de61a ("batman-adv: add the VLAN ID attribute to the TT entry") [ Context ] Signed-off-by: Sven Eckelmann Signed-off-by: Sasha Levin --- net/batman-adv/translation-table.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 8ab1257bade048..4bc73aceeb89f6 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -485,6 +485,9 @@ static void batadv_tt_local_event(struct batadv_priv *bat_priv, if (!batadv_compare_eth(entry->change.addr, common->addr)) continue; + if (entry->change.vid != tt_change_node->change.vid) + continue; + /* DEL+ADD in the same orig interval have no effect and can be * removed to avoid silly behaviour on the receiver side. The * other way around (ADD+DEL) can happen in case of roaming of -- 2.53.0