From patchwork Sat Jan 26 21:20:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Thibault X-Patchwork-Id: 10782603 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 53348139A for ; Sat, 26 Jan 2019 21:21:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 383482CB49 for ; Sat, 26 Jan 2019 21:21:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2A0F02D07D; Sat, 26 Jan 2019 21:21:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8B8B52CB49 for ; Sat, 26 Jan 2019 21:21:38 +0000 (UTC) Received: from localhost ([127.0.0.1]:35736 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gnVOT-0008Og-2f for patchwork-qemu-devel@patchwork.kernel.org; Sat, 26 Jan 2019 16:21:37 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59663) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gnVNB-0007Wg-9b for qemu-devel@nongnu.org; Sat, 26 Jan 2019 16:20:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gnVNA-0004XD-AH for qemu-devel@nongnu.org; Sat, 26 Jan 2019 16:20:17 -0500 Received: from hera.aquilenet.fr ([2a0c:e300::1]:60798) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gnVNA-0004Wf-2a for qemu-devel@nongnu.org; Sat, 26 Jan 2019 16:20:16 -0500 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 3874B76E4; Sat, 26 Jan 2019 22:20:14 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id J112JyFNWjFf; Sat, 26 Jan 2019 22:20:13 +0100 (CET) Received: from function (lfbn-1-11161-124.w86-213.abo.wanadoo.fr [86.213.235.124]) by hera.aquilenet.fr (Postfix) with ESMTPSA id 7583B76E5; Sat, 26 Jan 2019 22:20:12 +0100 (CET) Received: from samy by function with local (Exim 4.92-RC4) (envelope-from ) id 1gnVN5-00033y-In; Sat, 26 Jan 2019 22:20:11 +0100 From: Samuel Thibault To: qemu-devel@nongnu.org Date: Sat, 26 Jan 2019 22:20:08 +0100 Message-Id: <20190126212010.11730-2-samuel.thibault@ens-lyon.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190126212010.11730-1-samuel.thibault@ens-lyon.org> References: <20190126212010.11730-1-samuel.thibault@ens-lyon.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a0c:e300::1 Subject: [Qemu-devel] [PULL 1/3] slirp: Avoid unaligned 16bit memory access X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Samuel Thibault , Richard Henderson , stefanha@redhat.com, jan.kiszka@siemens.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP pkt parameter may be unaligned, so we must access it byte-wise. This fixes sparc64 host SIGBUS during pxe boot. Signed-off-by: Samuel Thibault Reviewed-by: Richard Henderson --- slirp/slirp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/slirp/slirp.c b/slirp/slirp.c index a9674ab090..739f364770 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -829,7 +829,7 @@ void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) if (pkt_len < ETH_HLEN) return; - proto = ntohs(*(uint16_t *)(pkt + 12)); + proto = (((uint16_t) pkt[12]) << 8) + pkt[13]; switch(proto) { case ETH_P_ARP: arp_input(slirp, pkt, pkt_len);