From: =?UTF-8?B?VG9yYWxmIEbDtnJzdGVy?= Subject: found a scenario for BUG at fs/ext4/super.c:804! Date: Thu, 30 May 2013 19:58:43 +0200 Message-ID: <51A79353.7030604@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE To: linux-ext4@vger.kernel.org Return-path: Received: from mout.gmx.net ([212.227.15.15]:62328 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753584Ab3E3R6r (ORCPT ); Thu, 30 May 2013 13:58:47 -0400 Received: from mailout-de.gmx.net ([10.1.76.31]) by mrigmx.server.lan (mrigmx001) with ESMTP (Nemesis) id 0McTEs-1UzmUv23kW-00Hfa3 for ; Thu, 30 May 2013 19:58:45 +0200 Sender: linux-ext4-owner@vger.kernel.org List-ID: With kernel 3.10-rcX there's a big likelihood to observe that issue if = I do the following steps:=20 1. create a 257 MB file /mnt/ramdisk/disk0 2. create an EXT4 fs onto it 3. mount it onto /mnt/ramdisk/victims/ 4. create files and directories in /mnt/ramdisk/victims/v1/v2 5. exportfs the directory /mnt/ramdisk/victims/ via NFS=20 6. start a user mode linux 7. within UML nfs-mount the exported directory /mnt/ramdisk/victims/ o= nto 3 different UML directories /mnt/nfsv[234] - just to test all 3 NFS= versions 8. run trinity within the UML guest using a victims directory /mnt/nfs= v[234]/v1/v2 for a longer period (rather hours) 9. stop UML, Ctrl-C any running trinity / UML process 10. try to umount mnt/ramdisk/victims/ 11. if that attempt fails stop the nfs service and run the umount comma= nd again - it segfaults now 12. if the 1st umount is however successfully then make a :-/ 2013-05-30T19:20:28.000+02:00 n22 rpc.mountd[2921]: authenticated unmou= nt request from 192.168.1.63:798 for /mnt/ramdisk/victims (/mnt/ramdisk= /victims) 2013-05-30T19:20:28.000+02:00 n22 rpc.mountd[2921]: authenticated unmou= nt request from 192.168.1.63:799 for /mnt/ramdisk/victims (/mnt/ramdisk= /victims) 2013-05-30T19:20:42.569+02:00 n22 kernel: br0: port 1(tap0) entered dis= abled state 2013-05-30T19:21:10.000+02:00 n22 rpc.mountd[2921]: Caught signal 15, u= n-registering and exiting. 2013-05-30T19:21:10.336+02:00 n22 kernel: lockd: couldn't shutdown host= module for net c161c200! 2013-05-30T19:21:10.338+02:00 n22 kernel: nfsd: last server has exited,= flushing export cache 2013-05-30T19:21:12.227+02:00 n22 kernel: EXT4-fs (loop0): sb orphan he= ad is 32315 2013-05-30T19:21:12.227+02:00 n22 kernel: sb_info orphan list: 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32315 at e8702158= : mode 102357, nlink 0, next 32173 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32173 at e773a860= : mode 100406, nlink 0, next 32383 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32383 at e93bbd78= : mode 102041, nlink 0, next 32233 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32233 at e7e742e0= : mode 103267, nlink 0, next 32421 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32421 at e84fad10= : mode 100102, nlink 0, next 32155 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32155 at e8700538= : mode 100700, nlink 0, next 32230 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32230 at e77397f8= : mode 102747, nlink 0, next 32313 2013-05-30T19:21:12.227+02:00 n22 kernel: inode loop0:32313 at e8701ca8= : mode 102667, nlink 0, next 32244 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32244 at e79b3670= : mode 100353, nlink 0, next 32361 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32361 at e8703b20= : mode 100206, nlink 0, next 32271 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32271 at e79b3b20= : mode 100000, nlink 0, next 32255 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32255 at eb8ec088= : mode 104657, nlink 0, next 32366 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32366 at e8701f00= : mode 105711, nlink 0, next 32281 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32281 at e77382e0= : mode 101637, nlink 0, next 32151 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32151 at e92cce98= : mode 101557, nlink 0, next 32138 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32138 at e932a608= : mode 101327, nlink 0, next 32013 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32013 at e74be158= : mode 101527, nlink 0, next 32012 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32012 at e74be3b0= : mode 102427, nlink 0, next 32110 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32110 at e74bdf00= : mode 101303, nlink 0, next 32112 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32112 at e74beab8= : mode 100000, nlink 0, next 32066 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32066 at e79f9a50= : mode 104607, nlink 0, next 32148 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32148 at e9331ca8= : mode 102507, nlink 0, next 32158 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32158 at e84c31c0= : mode 100000, nlink 0, next 32139 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32139 at e84c1ca8= : mode 101507, nlink 0, next 32115 2013-05-30T19:21:12.228+02:00 n22 kernel: inode loop0:32115 at e93310f0= : mode 104037, nlink 0, next 0 2013-05-30T19:21:12.228+02:00 n22 kernel: ------------[ cut here ]-----= ------- 2013-05-30T19:21:12.228+02:00 n22 kernel: kernel BUG at fs/ext4/super.c= :804! 2013-05-30T19:21:12.228+02:00 n22 kernel: invalid opcode: 0000 [#1] SMP= 2013-05-30T19:21:12.228+02:00 n22 kernel: Modules linked in: loop nfsd= auth_rpcgss oid_registry lockd sunrpc ip6t_REJECT ip6table_filter ip6_= tables ipt_MASQUERADE xt_owner xt_LOG xt_limit xt_multiport ipt_REJECT = xt_tcpudp xt_recent xt_conntrack iptable_nat nf_conntrack_ipv4 nf_defra= g_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_table= s af_packet pppoe pppox ppp_generic slhc bridge stp llc ipv6 tun fuse d= m_mod coretemp kvm_intel kvm aesni_intel i915 xts aes_i586 lrw gf128mul= ablk_helper arc4 hid_cherry hid_generic iwldvm fbcon snd_hda_codec_con= exant cfbfillrect cfbimgblt cryptd i2c_algo_bit sr_mod cfbcopyarea inte= l_agp sdhci_pci cdrom intel_gtt evdev mac80211 sdhci bitblit mmc_core s= oftcursor font acpi_cpufreq mperf psmouse usbhid drm_kms_helper usblp s= nd_hda_intel e1000e uvcvideo drm videobuf2_vmalloc hid agpgart videobuf= 2_memops videobuf2_core videodev fb 8250_pci snd_hda_codec ptp i2c_i801= 8250 pps_core processor battery fbdev iwlwifi i2c_core cfg80211 thermal wmi= tpm_tis snd_pcm snd_page_alloc snd_timer tpm tpm_bios thinkpad_acpi vi= deo nvram snd soundcore ac rfkill thermal_sys button serial_core hwmon = [last unloaded: microcode] 2013-05-30T19:21:12.228+02:00 n22 kernel: CPU: 1 PID: 11831 Comm: umoun= t Not tainted 3.10.0-rc3+ #6 2013-05-30T19:21:12.228+02:00 n22 kernel: Hardware name: LENOVO 4180F65= /4180F65, BIOS 83ET73WW (1.43 ) 11/30/2012 2013-05-30T19:21:12.228+02:00 n22 kernel: task: eec69aa0 ti: eb4b6000 t= ask.ti: eb4b6000 2013-05-30T19:21:12.228+02:00 n22 kernel: EIP: 0060:[] EFLAGS= : 00010287 CPU: 1 2013-05-30T19:21:12.228+02:00 n22 kernel: EIP is at ext4_put_super+0x2d= c/0x2e0 2013-05-30T19:21:12.228+02:00 n22 kernel: EAX: 0000003d EBX: eaa3d400 E= CX: eaa3d550 EDX: eaa3d550 2013-05-30T19:21:12.228+02:00 n22 kernel: ESI: eaa3f000 EDI: eaa3d514 E= BP: eb4b7efc ESP: eb4b7ecc 2013-05-30T19:21:12.228+02:00 n22 kernel: DS: 007b ES: 007b FS: 00d8 GS= : 00e0 SS: 0068 2013-05-30T19:21:12.228+02:00 n22 kernel: CR0: 80050033 CR2: b6bab000 C= R3: 2edc6000 CR4: 000407f0 2013-05-30T19:21:12.229+02:00 n22 kernel: DR0: 00000000 DR1: 00000000 D= R2: 00000000 DR3: 00000000 2013-05-30T19:21:12.229+02:00 n22 kernel: DR6: ffff0ff0 DR7: 00000400 2013-05-30T19:21:12.229+02:00 n22 kernel: Stack: 2013-05-30T19:21:12.229+02:00 n22 kernel: c1567fa0 eaa3f1bc 00007d73 e9= 3310f0 0000881f 00000000 00000000 e93310d0 2013-05-30T19:21:12.229+02:00 n22 kernel: eaa3d550 eaa3f000 eaa3f058 c1= 4a06e0 eb4b7f18 c111f771 eb4b7f28 eb4b7f18 2013-05-30T19:21:12.229+02:00 n22 kernel: f1d70400 00000083 eaa3f000 eb= 4b7f28 c111f819 eaa3f000 c15fde28 eb4b7f38 2013-05-30T19:21:12.229+02:00 n22 kernel: Call Trace: 2013-05-30T19:21:12.229+02:00 n22 kernel: [] generic_shutdown= _super+0x51/0xd0 2013-05-30T19:21:12.229+02:00 n22 kernel: [] kill_block_super= +0x29/0x70 2013-05-30T19:21:12.229+02:00 n22 kernel: [] deactivate_locke= d_super+0x44/0x70 2013-05-30T19:21:12.229+02:00 n22 kernel: [] deactivate_super= +0x47/0x60 2013-05-30T19:21:12.229+02:00 n22 kernel: [] mntput_no_expire= +0xcd/0x120 2013-05-30T19:21:12.229+02:00 n22 kernel: [] SyS_umount+0xae/= 0x330 2013-05-30T19:21:12.229+02:00 n22 kernel: [] SyS_oldumount+0x= 1e/0x20 2013-05-30T19:21:12.229+02:00 n22 kernel: [] sysenter_do_call= +0x12/0x22 2013-05-30T19:21:12.229+02:00 n22 kernel: Code: 24 a0 7f 56 c1 05 bc 01= 00 00 89 44 24 04 e8 d2 f8 2b 00 8b 4d ec 8b 55 f0 8b 09 39 ca 75 b2 3= 9 93 50 01 00 00 0f 84 9a fe ff ff <0f> 0b 66 90 55 89 e5 83 ec 20 66 6= 6 66 66 90 8d 45 18 c7 04 24 2013-05-30T19:21:12.229+02:00 n22 kernel: EIP: [] ext4_put_su= per+0x2dc/0x2e0 SS:ESP 0068:eb4b7ecc 2013-05-30T19:21:12.229+02:00 n22 kernel: ---[ end trace 2a52a524ae176d= ef ]--- --=20 MfG/Sincerely Toralf F=C3=B6rster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html