From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.secunet.com (mx1.secunet.com [62.96.220.36]) (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 CFBDC1E51E0; Wed, 20 May 2026 06:51:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.96.220.36 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779259875; cv=none; b=tiVXc+lrEVnQQzRWpTgGz/MOsjzdqQaDqttXKgH90GlhoAC8zjMqLr6UR9/p35VlTdcUmQXHOvsrSmUHclRLvcmWn7PF14+cHYRn18dc9OY4TgyCpT0zlYEVVhAcNSjGXB35q/10I2StGBTnbsdrl7mOiKjhV/F0307BRAD1Y0Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779259875; c=relaxed/simple; bh=ND8kbuIVBSkCZgoXqR/WoD8dHGWbu0FC3i/yvI9gkrQ=; h=Date:From:To:CC:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=GzB+95GKiHLchT6rDIoKdwQGu2WTdm6OZLWJ+C4vGEZqhw4ntPxh9cbs+JNxpRHT+TtG5HjvcogumV5KS1kxFaN8aYIAtleJjF6EYkYjdslhcWcgsrd5DgsdbJMSDVXW+q9Nm8uHpmEhbQXaiMAHoxvjt6qzjS7U1x3QvSyRcfk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=secunet.com; spf=pass smtp.mailfrom=secunet.com; dkim=pass (2048-bit key) header.d=secunet.com header.i=@secunet.com header.b=coirRY3M; arc=none smtp.client-ip=62.96.220.36 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=secunet.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=secunet.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=secunet.com header.i=@secunet.com header.b="coirRY3M" Received: from localhost (localhost [127.0.0.1]) by mx1.secunet.com (Postfix) with ESMTP id 28ADD207B0; Wed, 20 May 2026 08:51:12 +0200 (CEST) X-Virus-Scanned: by secunet Received: from mx1.secunet.com ([127.0.0.1]) by localhost (mx1.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6ZP1EmhL3nWy; Wed, 20 May 2026 08:51:11 +0200 (CEST) Received: from EXCH-01.secunet.de (rl1.secunet.de [10.32.0.231]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.secunet.com (Postfix) with ESMTPS id A39F620184; Wed, 20 May 2026 08:51:11 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.secunet.com A39F620184 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=secunet.com; s=202301; t=1779259871; bh=bf52P203YyUk/5Ce0Svchn25/+VN6OGb10VcsgHSZfk=; h=Date:From:To:CC:Subject:References:In-Reply-To:From; b=coirRY3Mahz8WlYgUGe2E+7k9fXTBl/KZsgVZoLoOnyrKuZ1Tu4mMSCYl3CulwTBg Uhet26Me93r8057WX7G0B61oTcwTdyJolNMMZp9NHjgd3mcnr2HlZ8DZJtUY21IClf Rmk65/FBzcJS4jiWVA6/PQypsmfICBv7wbMJpgnEiUfzL7Nmc5RC6gQlpMHuoON1PF ODRparwQKhQVPBSqBwEV7UN5M/Fsn2tXtABMDCA/sfyasv2ZFirRu+hi8u/KB2rYCi Nf3Ie2XSu10NNEEgljPUtPgC56+PJu3Psp4AR8deQkQ/HJ7qIJiCZDz7LFMARl7mj7 CGThsnJBW3HCw== Received: from secunet.com (10.182.7.193) by EXCH-01.secunet.de (10.32.0.171) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.37; Wed, 20 May 2026 08:51:11 +0200 Received: (nullmailer pid 1140913 invoked by uid 1000); Wed, 20 May 2026 06:51:10 -0000 Date: Wed, 20 May 2026 08:51:10 +0200 From: Steffen Klassert To: Leon Romanovsky CC: =?iso-8859-1?Q?G=FCnther?= Muller , Herbert Xu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , , Subject: Re: [PATCH v2] xfrm: fix missing headroom check in xfrm_dev_direct_output Message-ID: References: <20260517111940.8987-1-gunther.muller2008@gmail.com> <20260518080410.11119-1-gunther.muller2008@gmail.com> <20260518123054.GS33515@unreal> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260518123054.GS33515@unreal> X-ClientProxiedBy: EXCH-01.secunet.de (10.32.0.171) To EXCH-01.secunet.de (10.32.0.171) On Mon, May 18, 2026 at 03:30:54PM +0300, Leon Romanovsky wrote: > On Mon, May 18, 2026 at 10:04:09AM +0200, Günther Muller wrote: > > Ensure the skb has enough headroom for the hardware offload device's > > hard_header_len. If the headroom is insufficient (e.g., when routing > > through certain virtual or tunnel devices), __skb_push() underflows > > skb->data below skb->head, causing silent memory corruption. > > Could you please provide the steps required to reproduce the issue? Please answer Leons question. Thanks!