On Wed, Jul 10, 2013 at 12:51:35PM +0200, Francois Gouget wrote:
> I have a Solaris 11.11 (vmware) virtual machine which mounts a host
> filesystem via NFS.
> With the linux-image-3.2.0-3-amd64 kernel all was fine.
> But with the linux-image-3.2.0-4-amd64 one the NFS accesses soon result in
> the general protection fault included below. After that NFS accesses stop
> working and the filesystem cannot be mounted by other VMs.
What now. Is it broken in 3.2 or in 3.9.8-1 as listed as running?
> ** Tainted: PDO (4225)
> * Proprietary module has been loaded.
Nice try.
> [ 903.144368] general protection fault: 0000 [#1] SMP
> [ 903.144374] Modules linked in: bridge stp llc ebtable_nat ebtables
> vmnet(O) vsock(O) vmci(O) ppdev lp vmmon(O) bnep rfcomm bluetooth rfkill
> cpufreq_powersave cpufreq_stats cpufreq_conservative cpufreq_userspace tun
> pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) binfmt_misc uinput nfsd
> auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc ipt_MASQUERADE
> xt_REDIRECT xt_recent xt_connmark xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6
> xt_state iptable_nat nf_nat_ipv4 ip6table_filter ip6_tables iptable_filter
> ip_tables x_tables nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack_ipv4
> nf_defrag_ipv4 nf_conntrack vboxdrv(O) it87 hwmon_vid loop firewire_sbp2 fuse
> nvidia(PO) ivtv_alsa tuner_simple tuner_types tda9887 tda8290 tuner msp3400
> saa7127 mt2060 pcspkr acpi_cpufreq mperf processor thermal_sys
> snd_hda_codec_realtek snd_hda_intel snd_hda_codec coretemp saa7115 evdev
> snd_usb_audio snd_usbmidi_lib snd_hwdep kvm_intel snd_seq_midi
> snd_seq_midi_event snd_seq snd_rawmidi snd_pcm snd
> _page_alloc i2c_i801 ivtv tveeprom cx2341x v4l2_common videodev media
> i2c_algo_bit dvb_usb_dib0700 dib8000 dib7000m dib0090 dib0070 dib7000p
> dib3000mc dibx000_common dvb_usb dvb_core rc_core i2c_core iTCO_wdt
> iTCO_vendor_support lpc_ich mfd_core button kvm parport_pc parport
> snd_seq_device snd_timer snd soundcore ext4 crc16 jbd2 mbcache dm_mod raid1
> md_mod sr_mod cdrom ata_generic hid_generic usbhid hid sg sd_mod crc_t10dif
> usb_storage firewire_ohci firewire_core xhci_hcd crc_itu_t r8169 pata_jmicron
> mii ahci libahci microcode libata ehci_pci uhci_hcd ehci_hcd scsi_mod usbcore
> usb_common
> [ 903.144486] CPU 1
> [ 903.144491] Pid: 5270, comm: nfsd Tainted: P O 3.9-1-amd64 #1
> Debian 3.9.8-1 Gigabyte Technology Co., Ltd. EP35-DS3P/EP35-DS3P
So actually it is 3.9.8-1
> [ 903.144494] RIP: 0010:[<ffffffffa11061bd>] [<ffffffffa11061bd>]
> free_generic_stateid+0xc/0x29 [nfsd]
> [ 903.144507] RSP: 0018:ffff8800c17f3d48 EFLAGS: 00010202
> [ 903.144510] RAX: 0000000000000000 RBX: 0a226f6e7822203d RCX:
> 0000000000000078
> [ 903.144512] RDX: 0000000000000049 RSI: ffff88012a68c228 RDI:
> 0a226f6e7822203d
> [ 903.144514] RBP: ffff8801275428c0 R08: ffff8800c144e3a0 R09:
> 0000000000000000
> [ 903.144517] R10: 000000000000008b R11: 0000000000000010 R12:
> ffff8800c174e040
> [ 903.144519] R13: ffffffff8167b8c0 R14: ffff8800c1754000 R15:
> ffff8801282dc600
> [ 903.144522] FS: 0000000000000000(0000) GS:ffff88012fc80000(0000)
> knlGS:0000000000000000
> [ 903.144524] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 903.144526] CR2: 00007f48e00218c8 CR3: 0000000036c8b000 CR4:
> 00000000000007e0
> [ 903.144529] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 903.144531] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [ 903.144534] Process nfsd (pid: 5270, threadinfo ffff8800c17f2000, task
> ffff88012a74a7b0)
> [ 903.144646] Code: fb 85 c0 75 11 be 2b 00 00 00 48 c7 c7 31 1c 11 a1 e8 c1
> 6f f3 df 48 89 df 5b e9 3b fd ff ff 55 48 8b 2d a7 1e 01 00 53 48 89 fb <8b>
> 77 10 48 8b 7f 18 48 83 c7 38 e8 fb fe 0b e0 48 89 de 48 89
> [ 903.144678] RIP [<ffffffffa11061bd>] free_generic_stateid+0xc/0x29 [nfsd]
This matches the following code:
| 131bd: 8b 77 10 mov 0x10(%rdi),%esi
RDI is completely bogus.
There are some race fixes in 3.10. It is possible that they fix the
problem.
Bastian
--
Time is fluid ... like a river with currents, eddies, backwash.
-- Spock, "The City on the Edge of Forever", stardate 3134.0
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