From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-6.sys.kth.se (smtp-6.sys.kth.se [130.237.48.98]) (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 C277D2F6918; Mon, 5 Oct 2026 13:03:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=130.237.48.98 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791205409; cv=none; b=ebQfQ368xJeUkz53piXczjH4WVO+TUdCNkuES5zGUS8FR1yzmJNnd0LfnvAJdAz+t0YEXkexyhG7mfUN4slaNG9X4Gtd2W/gVxrdJltaeZlc09YDx5f4BTMe7Nj8YXkSI5DWID8arWsi3RSrXFiyBqTAnIkFrV6gA9/8ImS0reY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791205409; c=relaxed/simple; bh=MVFfWOIIPiiQkHv07qGu1xruZDVaw9OkSZAAkfZe6ro=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=eq2Xl1Vgr7HmRP6sFZ+HyfY+YbfReV0IXhpjqAcQWHvCkKLpLpBKei+Dd8bq+VpRjJkEuk9ts7cX8QrVgrXUNzkkz5xPO+Pbr5SzpKh4dyw+X3n3KiQJ8DkUGHVq6lTa/QhbFQOzB8aEyigVat+eQEYVf1JJ29azgIhC6NdLaqg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=kth.se; spf=pass smtp.mailfrom=kth.se; dkim=pass (1024-bit key) header.d=kth.se header.i=@kth.se header.b=g+8rvQFN; arc=none smtp.client-ip=130.237.48.98 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=kth.se Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kth.se Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=kth.se header.i=@kth.se header.b="g+8rvQFN" Received: from nargothrond (n183-p49.eduroam.kth.se [130.229.183.49]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: sfle) by smtp-6.sys.kth.se (Postfix) with ESMTPSA id 4hyzqX5gfwzPNQ9; Mon, 5 Oct 2026 14:54:32 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp-6.sys.kth.se 4hyzqX5gfwzPNQ9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kth.se; s=default; t=1791204874; bh=Q+Tspf424GBeNH94ZsNJbIE2u/ekNjbBI5ATi6HYPc4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=g+8rvQFNbQZRDnvI+7nG3wFp3CCY1LFUGd5NBlWyGd4Wqe3OgyxwQMMRQjXUBtdSZ e7QGsZO6NoT5nosTkovcxTocKT1/Un42iObW5J7QESV/c18a6WYhx1rrv9WD+qKwzP AOI2A5cTKwh86aBFCPWT8rCS4qtC7GlUUJbf9hKg= Date: Mon, 5 Oct 2026 14:54:30 +0200 From: Stefan Fleischmann To: Eric Dumazet , Fabian =?UTF-8?B?R3LDvG5iaWNobGVy?= Cc: Michael Chan , Joe Damato , netdev@vger.kernel.org, Pavan Chebbi , regressions@lists.linux.dev, stable@vger.kernel.org Subject: Re: [REGRESSION] Commit 447cbe95ebb9 causes IOMMU DMA faults on macvlan/vlan with bnxt_en Message-ID: <20261005145430.12777c2c@nargothrond> In-Reply-To: References: <20261004122616.56714cbd@nargothrond> <20261004163532.3134dd41@nargothrond> <20261004192902.3ab3b7f3@nargothrond> <919dcfaa-005f-4bfd-8889-39acda5f7a92@kernel.org> <854f3985-a4ab-4014-b18d-9fead61602e1@kernel.org> <1791193344.w5j2m55mib.astroid@yuna.none> Organization: KTH X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, 5 Oct 2026 12:14:00 +0200 Eric Dumazet wrote: > Le lun. 5 oct. 2026 =C3=A0 11:44, Fabian Gr=C3=BCnbichler > a =C3=A9crit : > > > > On October 5, 2026 3:59 am, Eric Dumazet wrote: =20 > > > > > > > > > On 10/5/26 00:29, Michael Chan wrote: =20 > > >> > > >> I think skb->len is not updated with the padded length here. So > > >> the HW will drop the packet seeing that the length is too short. > > >> There is another skb_put_padto() that might work better? =20 > > > > > > +1 Exactly, thanks! =20 > > > > FWIW, we suspect we have quite a few users running into this since > > importing upstream changes from 7.2.2-7.2.5. > > > > Will report back once we've provided those users with a kernel with > > the below diff. =20 >=20 > Patch has been sent for review: >=20 > https://lore.kernel.org/netdev/20261005023812.130639-1-edumazet@kernel.or= g/ I'm testing the patch on v6.18.55, and it looks good so far. 5 hours and counting without any issues. Best, Stefan