On Mon, 2012-02-20 at 00:33 +0000, Chris Rankin wrote: > Hi, > > My 3.2.6 (x86, 32 bit) kernel oopsed last night while pulling a file across an > NFS mount: > > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: [<c107a333>] page_address+0x7/0xa4 > *pde = 00000000 > Oops: 0000 [#1] PREEMPT SMP > Modules linked in: nfs fuse cpufreq_ondemand p4_clockmod speedstep_lib bnep > bluetooth rfkill crc16 ip6t_LOG ipt_LOG nf_conntrack_ipv6 xt_tcpudp > nf_defrag_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack max6650 > ip6table_filter iptable_filter ip6_tables ip_tables x_tables dm_mirror > dm_region_hash dm_log dm_mod snd_emu10k1_synth snd_emux_synth snd_seq_virmidi > snd_seq_midi_event snd_seq_midi_emul snd_emu10k1 snd_ac97_codec snd_usb_audio > ac97_bus snd_seq snd_pcm snd_timer snd_page_alloc snd_util_mem uvcvideo > snd_hwdep snd_usbmidi_lib snd_rawmidi snd_seq_device joydev snd usbhid psmouse > ppdev videodev parport_pc floppy parport sg firewire_ohci firewire_core pcspkr > dcdbas crc_itu_t soundcore serio_raw processor i2c_i801 binfmt_misc nfsd lockd > nfs_acl auth_rpcgss sunrpc exportfs uinput ipv6 ext3 jbd mbcache sr_mod sd_mod > cdrom sata_sil pata_acpi uhci_hcd ata_piix libata ehci_hcd e1000 scsi_mod > usbcore usb_common button radeon intel_agp intel_gtt ttm drm_kms_helper drm > agpgart backlight i2c_algo_bit cfbcopyarea cfbimgblt cfbfillrect [last unloaded: > scsi_wait_scan] > > Pid: 3403, comm: mv Not tainted 3.2.6 #1 Dell Computer Corporation Precision > WorkStation 650 /0F1262 > EIP: 0060:[<c107a333>] EFLAGS: 00210206 CPU: 1 > EIP is at page_address+0x7/0xa4 > EAX: 00000000 EBX: f247fde8 ECX: f43df1e4 EDX: 00000038 > ESI: f247fccc EDI: 0000000e EBP: 00000000 ESP: f247fc74 > DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > Process mv (pid: 3403, ti=f247e000 task=f55c3b00 task.ti=f247e000) > Stack: > f43df1e4 f247fde8 f247fccc 0000000e f2b79c00 f91d006f 00000000 00001000 > f247fc98 00000000 00000002 f43df074 00000000 00000000 0000006e 00000000 > f54d8400 f2b79c00 00000000 f91d0008 f84d25ff f43df020 f43df0ac f2b79c04 > Call Trace: > [<f91d006f>] ? nfs4_xdr_enc_getacl+0x67/0x86 [nfs] > [<f91d0008>] ? nfs4_xdr_enc_fs_locations+0x87/0x87 [nfs] > [<f84d25ff>] ? rpcauth_wrap_req+0x72/0x7c [sunrpc] > [<f84cc3ef>] ? call_transmit+0x172/0x1dd [sunrpc] > [<f84d182e>] ? __rpc_execute+0x59/0x216 [sunrpc] > [<c1021a61>] ? add_preempt_count+0x88/0x8a > [<c1039936>] ? wake_up_bit+0xb/0x16 > [<f84cc71b>] ? rpc_run_task+0x57/0x5c [sunrpc] > [<f84cc7fb>] ? rpc_call_sync+0x3a/0x54 [sunrpc] > [<f91c9164>] ? __nfs4_get_acl_uncached+0x15d/0x1ed [nfs] > [<f91cb43a>] ? nfs4_xattr_get_nfs4_acl+0xdf/0x10c [nfs] > [<c10abaee>] ? generic_getxattr+0x3b/0x43 > [<c10abab3>] ? xattr_resolve_name+0x4b/0x4b > [<c10abeb1>] ? vfs_getxattr+0x74/0x7b > [<c10abf2c>] ? getxattr+0x74/0xc5 > [<c109fd8c>] ? path_openat+0x2bb/0x2d0 > [<c107d0b7>] ? handle_pte_fault+0x23b/0x5fc > [<c109fe4a>] ? do_filp_open+0x23/0x5c > [<c109d1dc>] ? getname_flags+0x20/0xf1 > [<c1021948>] ? get_parent_ip+0x8/0x19 > [<c1021948>] ? get_parent_ip+0x8/0x19 > [<c10219cd>] ? sub_preempt_count+0x74/0x80 > [<c1021948>] ? get_parent_ip+0x8/0x19 > [<c1021a61>] ? add_preempt_count+0x88/0x8a > [<c1094ede>] ? do_sys_open+0x161/0x16b > [<c1094ede>] ? do_sys_open+0x161/0x16b > [<c10ac041>] ? listxattr+0x80/0x88 > [<c10ac5a8>] ? sys_fgetxattr+0x42/0x5a > [<c1219b8c>] ? sysenter_do_call+0x12/0x22 > Code: eb 05 bb ea ff ff ff 89 d8 83 c4 20 5b 5e 5f 5d c3 8b 6c 24 18 f7 44 24 44 > 00 00 01 00 74 86 31 db eb c5 90 55 57 56 53 51 89 c5 <8b> 00 c1 e8 1e c1 e0 0a > 05 80 33 2f c1 2b 80 8c 03 00 00 3d 00 > EIP: [<c107a333>] page_address+0x7/0xa4 SS:ESP 0068:f247fc74 > CR2: 0000000000000000 > > The remote host was also running 3.2.6, but was x86_64. (I've not had any > trouble copying NFS files between two 32 bit 3.2.6 kernels, which is why I'm > thinking that the remote host being x86_64 might be significant.) > > For the record, the file was actually copied successfully. After I'd rebooted, I > confirmed that the SHA1 sums matched. The "mv" operation obviously failed before > the remote copy could be deleted. It's a known bug. There is a fix at http://git.linux-nfs.org/?p=trondmy/nfs-2.6.git;a=commit;h=331818f1c468a24e581aedcbe52af799366a9dfe Cheers Trond -- Trond Myklebust Linux NFS client maintainer NetApp Trond.Myklebust@xxxxxxxxxx www.netapp.com ��.n��������+%������w��{.n�����{��w��� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
