From owner-freebsd-current@FreeBSD.ORG Tue Dec 9 16:36:39 2014 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 561F4D0B for ; Tue, 9 Dec 2014 16:36:39 +0000 (UTC) Received: from mail-vc0-x22d.google.com (mail-vc0-x22d.google.com [IPv6:2607:f8b0:400c:c03::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 106E3CD5 for ; Tue, 9 Dec 2014 16:36:39 +0000 (UTC) Received: by mail-vc0-f173.google.com with SMTP id im17so455396vcb.18 for ; Tue, 09 Dec 2014 08:36:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=M9+ajk8Ybex/buPxozEsQ76yioUBMIonEtx4L9QAPO8=; b=SU2YQHwksrOGKqZZ2tp1jJsGHQxxI1ZC0ZeNEmgCROcKIZMBwLy1beA8JFB8DyN3ET TuCxEMiIAyakjokAm3MHWj4zRwMQcyOcT9Cl/5Fuf7scyMANBi6tSUSk7/wjjqEcCbUI NyfNfm9Unba606U6t3u6/rdnh6/fuQoirzO56IDXqhN/6q/3oNzB6OpCfCz0wa1GhfKN /PQI83SVTp8IK0JOykAdb8I8w0q+b+fV7BXQlktvDrbIlH4XH2tL0wwuC6xfeJ7FUwLb cvzXnIrLZysytb3Udgp3RzepNU8kvMOlb6SyoaO22RZ4c5mb6maUaT4krzvN4zOLMRQP KfXw== MIME-Version: 1.0 X-Received: by 10.220.205.2 with SMTP id fo2mr1615974vcb.8.1418142998074; Tue, 09 Dec 2014 08:36:38 -0800 (PST) Received: by 10.52.178.73 with HTTP; Tue, 9 Dec 2014 08:36:38 -0800 (PST) Date: Tue, 9 Dec 2014 11:36:38 -0500 Message-ID: Subject: re(4) use-after-free From: Shawn Webb To: FreeBSD-current Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Dec 2014 16:36:39 -0000 Hey FreeBSD Peeps, I just got a new laptop (Lenovo Y50-70) that has a Realtek RTL8111/8168B NIC in it. When running `dhclient re0`, I get a message on the console from the kernel: Memory modified after free 0xfffff8001bd85800(2048) val=ffffffff @ 0xfffff8001bd85800 re0 fails to grab an IP via DHCP. And if I set it statically, I get 100% packet drops. Nothing comes in and nothing goes out. Thanks, Shawn