From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Jason@zx2c4.com Received: from krantz.zx2c4.com (localhost [127.0.0.1]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id df6eca34 for ; Fri, 17 Feb 2017 13:36:03 +0000 (UTC) Received: from frisell.zx2c4.com (frisell.zx2c4.com [192.95.5.64]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 431eace9 for ; Fri, 17 Feb 2017 13:36:03 +0000 (UTC) Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTP id b2405461 for ; Fri, 17 Feb 2017 13:36:03 +0000 (UTC) Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id b0714710 (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128:NO) for ; Fri, 17 Feb 2017 13:36:03 +0000 (UTC) Received: by mail-ot0-f182.google.com with SMTP id k4so11183960otc.0 for ; Fri, 17 Feb 2017 05:36:23 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <05adeaed-20ff-ce42-b8c6-73bbc55d7021@sholland.org> References: <7a3a5f6d-1eb5-ef32-097e-e24c2f9d2805@sholland.org> <05adeaed-20ff-ce42-b8c6-73bbc55d7021@sholland.org> From: "Jason A. Donenfeld" Date: Fri, 17 Feb 2017 14:36:22 +0100 Message-ID: Subject: Re: Instability during large transfers To: Samuel Holland Content-Type: text/plain; charset=UTF-8 Cc: WireGuard mailing list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hey Samuel, Thanks very much for the excellent debugging output. I'll try to reproduce this as well on my systems. The stack trace does indicate that the OOPS is happening in padata, not in wireguard, so I wonder if this is some bug caused either by grsecurity or by something else that was then fixed, but since your kernel is a bit old (4.7.10) maybe the fix didn't make it. In either case, I'll try to reproduce on that kernel and on newer kernels and will get back to you. I presume you have most PaX options turned on? Thanks, Jason