From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752117AbcHFWla (ORCPT ); Sat, 6 Aug 2016 18:41:30 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:46806 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751724AbcHFWl2 (ORCPT ); Sat, 6 Aug 2016 18:41:28 -0400 To: "linux-kernel@vger.kernel.org" From: Guenter Roeck Subject: Traceback seen once when running x86 qemu emulation with latest kernel Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org Message-ID: <57A66793.2060907@roeck-us.net> Date: Sat, 6 Aug 2016 15:41:23 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated_sender: linux@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: linux@roeck-us.net X-Authenticated-Sender: bh-25.webhostbox.net: linux@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I have seen the following traceback once when running the latest mainline in qemu. Starting udev random: crng init done udevd[117]: starting version 182 Starting Bootlog daemon: bootlogd. EXT4-fs (hda): re-mounted. Opts: errors=remount-ro,data=ordered ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at ./arch/x86/include/asm/fpu/internal.h:534 fpu__restore+0x120/0x220 Modules linked in: CPU: 0 PID: 1 Comm: init Not tainted 4.7.0-yocto-standard+ #1 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 00000000 00000000 cf893e58 c1390e2a cf893e88 c1042ea1 c19ea4bc 00000000 00000001 c19e5428 00000216 c1021100 00000216 cf8e8d40 00000000 cf8e8000 cf893e9c c1042eea 00000009 00000000 00000000 cf893eb4 c1021100 00000000 Call Trace: [] dump_stack+0x16/0x1c [] __warn+0xe1/0x100 [] ? fpu__restore+0x120/0x220 [] warn_slowpath_null+0x2a/0x30 [] fpu__restore+0x120/0x220 [] __fpu__restore_sig+0x139/0x610 [] fpu__restore_sig+0x2f/0x50 [] restore_sigcontext.isra.7+0xda/0x100 [] sys_sigreturn+0x91/0xb0 [] do_int80_syscall_32+0x5a/0xa0 [] entry_INT80_32+0x2a/0x2a ---[ end trace b5a2004ac28f878b ]--- Configuring network interfaces... done. Command line: qemu-system-i386 -kernel arch/x86/boot/bzImage -M isapc -cpu n270 -no-reboot \ -m 256 -drive file=core-image-minimal-qemux86.ext3,format=raw,if=ide \ --append "root=/dev/hda rw mem=256M vga=0 uvesafb.mode_option=640x480-32 oprofile.timer=1 console=ttyS0 console=tty" -nographic Kernel version: v4.7-12388-g0cbbc422d566 Scripts and root file system used for test: https://github.com/groeck/linux-build-test/tree/master/rootfs/x86 Log file: http://kerneltests.org/builders/qemu-x86-master/builds/581/steps/qemubuildcommand/logs/stdio Unfortunately, I was unable to reproduce the problem by re-running the test manually. Please let me know if there is anything I can do to help reproduce or fix the problem. Thanks, Guenter