Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751158Ab1C2EKS (ORCPT ); Tue, 29 Mar 2011 00:10:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36435 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750774Ab1C2EKQ (ORCPT ); Tue, 29 Mar 2011 00:10:16 -0400 Date: Tue, 29 Mar 2011 00:09:40 -0400 From: Dave Jones To: Linus Torvalds Cc: Andrew Morton , Linux Kernel Subject: vma corruption in today's -git Message-ID: <20110329040939.GA32764@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , Andrew Morton , Linux Kernel MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3706 Lines: 62 Running a kernel that I built from a git pull from this afternoon, I ran a barrage of stress tests, including some of the new syscall fuzzing work that I've been working on. Everything seemed just fine, except that after I had stopped running everything, loadavg was still at 6, with top showing kworker processes running at high % of cpu. I ran perf top, and got this .. BUG: unable to handle kernel paging request at fffffffffffffff3 IP: [] vma_stop.clone.3+0x18/0x33 PGD 1a05067 PUD 1a06067 PMD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0/energy_full CPU 0 Modules linked in: ipx p8022 psnap llc p8023 sctp libcrc32c tun vfat fat usb_storage uas nfs fscache fuse nfsd lockd nfs_acl auth_rpcgss sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput arc4 iwlagn btusb bluetooth snd_hda_codec_hdmi snd_hda_codec_idt mac80211 snd_hda_intel snd_usb_audio snd_hda_codec dell_wmi snd_seq sparse_keymap uvcvideo snd_pcm dell_laptop snd_hwdep dcdbas snd_usbmidi_lib microcode videodev zaurus cfg80211 snd_rawmidi snd_seq_device cdc_ether v4l2_compat_ioctl32 usbnet snd_timer iTCO_wdt pcspkr joydev cdc_acm i2c_i801 cdc_wdm tg3 snd mii iTCO_vendor_support rfkill soundcore snd_page_alloc wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] Pid: 324, comm: perf Tainted: G W 2.6.38+ #5 Dell Inc. Adamo 13 /0N70T0 RIP: 0010:[] [] vma_stop.clone.3+0x18/0x33 RSP: 0018:ffff880114de1e48 EFLAGS: 00010286 RAX: 00000000fffffff3 RBX: ffff880007f44bc8 RCX: ffff8800b7216806 RDX: ffffffff81618f50 RSI: fffffffffffffff3 RDI: ffff880007f44bd8 RBP: ffff880114de1e58 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff81a26870 R11: 0000000000000246 R12: ffff88000fe3d880 R13: ffff8800b72168f8 R14: fffffffffffffff3 R15: 0000000000000000 FS: 00007f59e738c720(0000) GS:ffff88013fa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff3 CR3: 0000000136566000 CR4: 00000000000406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process perf (pid: 324, threadinfo ffff880114de0000, task ffff8800b43c23b0) Stack: 0000000000000000 ffff880007f44bc8 ffff880114de1e78 ffffffff8118d46a 0000000000000000 0000000000000400 ffff880114de1ef8 ffffffff81159a99 0000000000000004 ffff8801fffffff3 0000000000000004 ffff8800b7216930 Call Trace: [] m_stop+0x1e/0x30 [] seq_read+0x240/0x36e [] vfs_read+0xac/0xff [] ? fget_light+0x3a/0xa1 [] sys_read+0x4d/0x74 [] system_call_fastpath+0x16/0x1b Code: 8b 54 24 08 48 89 53 30 41 5d 5b 41 5c 31 c0 41 5d c9 c3 55 48 89 e5 53 48 83 ec 08 0f 1f 44 00 00 48 85 f6 74 1c 48 3b 37 74 17 8b 1e 48 8d bb a8 00 00 00 e8 d9 e6 ee ff 48 89 df e8 9a ab RIP [] vma_stop.clone.3+0x18/0x33 RSP CR2: fffffffffffffff3 ---[ end trace ea1a722d5e92836a ]--- it smells like something got corrupted, but I'm not sure where to start. I've got a bunch of debug options turned on, but nothing else triggered, so I've got nothing other than this oops to go on. Any thoughts ? Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/