* oops when copying a file from a nfs mount
@ 2012-02-03 22:36 koen
2012-02-03 23:08 ` J. Bruce Fields
0 siblings, 1 reply; 6+ messages in thread
From: koen @ 2012-02-03 22:36 UTC (permalink / raw)
To: J. Bruce Fields, Neil Brown; +Cc: linux-nfs
Hi,
Since updating from kernel 3.2.1 to 3.2.2, copying a file from a nfs mount
using `cp` results in a kernel oops. Copying the same file with `cat
/nfsmount/file > /local/file` gives no problems.
I can reliably trigger the oops with a simple:
cp /nfsmount/file /local/dir
System information:
% cat /proc/version
Linux version 3.2.2-1-vanilla (koen@pino) (gcc version 4.6.2 20120120 (prerelease) (GCC) ) #1 SMP PREEMPT Fri Feb 3 01:51:55 CET 2012
% zgrep '^CONFIG_NFS' /proc/config.gz
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
CONFIG_NFS_FSCACHE=y
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFSD=m
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_NFS_ACL_SUPPORT=m
CONFIG_NFS_COMMON=y
% ./ver_linux
Linux pino 3.2.2-1-vanilla #1 SMP PREEMPT Fri Feb 3 01:51:55 CET 2012 i686 Intel(R) Celeron(R) CPU E1200 @ 1.60GHz GenuineIntel GNU/Linux
Gnu C 4.6.2
Gnu make 3.82
binutils 2.22.0.20111227
util-linux 2.20.1
mount support
module-init-tools 4
e2fsprogs 1.42
jfsutils 1.1.15
reiserfsprogs 3.6.21
xfsprogs 3.1.7
pcmciautils 018
PPP 2.4.5
Linux C Library 2.15
Dynamic linker (ldd) 2.15
Linux C++ Library 6.0.16
Procps 3.2.8
Net-tools 1.60
Kbd 1.15.3
Sh-utils 8.15
Modules Loaded ipv6 ext3 jbd joydev snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device usbhid hid wacom snd_hda_codec_hdmi btusb bluetooth rfkill ppdev evdev snd_hda_codec_realtek radeon snd_hda_intel snd_hda_codec drm_kms_helper snd_pcm atl1 iTCO_wdt iTCO_vendor_support pcspkr ttm i2c_i801 serio_raw snd_page_alloc snd_hwdep snd_timer snd drm soundcore mii i2c_algo_bit i2c_core intel_agp intel_gtt agpgart floppy parport_pc parport asus_atk0110 nfs button nfs_acl lockd auth_rpcgss sunrpc fscache cpufreq_ondemand acpi_cpufreq mperf processor freq_table ext4 crc16 jbd2 mbcache dm_mod sd_mod pata_acpi ata_piix libata uhci_hcd scsi_mod ehci_hcd usbcore usb_common
% grep nfs /proc/mounts
servername:/data /data nfs4 rw,nosuid,nodev,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.16.1.84,minorversion=0,local_lock=none,addr=172.16.1.1 0 0
Trace:
Feb 3 03:45:23 pino kernel: [ 2931.910546] *pde = 00000000
Feb 3 03:45:23 pino kernel: [ 2931.910626] Modules linked in: ipv6 ext3 jbd joydev snd_usb_audio snd_usbmidi_lib usbhid snd_rawmidi snd_seq_device hid wacom btusb bluetooth rfkill snd_hda_codec_hdmi ppdev radeon evdev snd_hda_codec_realtek drm_kms_helper ttm snd_hda_intel iTCO_wdt iTCO_vendor_support drm pcspkr snd_hda_codec serio_raw i2c_i801 snd_pcm snd_page_alloc snd_hwdep i2c_algo_bit i2c_core snd_timer intel_agp atl1 intel_gtt snd agpgart mii soundcore floppy parport_pc parport asus_atk0110 button nfs nfs_acl lockd auth_rpcgss sunrpc fscache cpufreq_ondemand acpi_cpufreq mperf processor freq_table ext4 crc16 jbd2 mbcache dm_mod sd_mod pata_acpi ata_piix libata scsi_mod uhci_hcd ehci_hcd usbcore usb_common
Feb 3 03:45:23 pino kernel: [ 2931.911382]
Feb 3 03:45:23 pino kernel: [ 2931.911400] Pid: 2003, comm: cp Not tainted 3.2.2-1-vanilla #1 System manufacturer System Product Name/P5B-MX
Feb 3 03:45:23 pino kernel: [ 2931.911500] EIP: 0060:[<c01f3c00>] EFLAGS: 00010282 CPU: 1
Feb 3 03:45:23 pino kernel: [ 2931.911552] EIP is at page_address+0x10/0xe0
Feb 3 03:45:23 pino kernel: [ 2931.911592] EAX: 00000000 EBX: c6699dd8 ECX: f2c6b1e4 EDX: 00000038
Feb 3 03:45:23 pino kernel: [ 2931.911648] ESI: 00000000 EDI: 00000000 EBP: c6699c18 ESP: c6699c08
Feb 3 03:45:23 pino kernel: [ 2931.911704] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Feb 3 03:45:23 pino kernel: [ 2931.911839] 00001000 c6699dd8 00000000 c6699c78 c6699c54 f8666b45 00000000 00001000
Feb 3 03:45:23 pino kernel: [ 2931.911934] 0000000e 00000000 00000002 f2c6b084 00000000 00000000 0000006e 00000000
Feb 3 03:45:23 pino kernel: [ 2931.912028] f584c700 f59cde00 f8666ab0 c6699ca0 f855c4a5 f2c6b020 c6699c7c f855ca07
Feb 3 03:45:23 pino kernel: [ 2931.912161] [<f8666b45>] nfs4_xdr_enc_getacl+0x95/0xc0 [nfs]
Feb 3 03:45:23 pino kernel: [ 2931.912224] [<f8666ab0>] ? nfs4_xdr_enc_fs_locations+0xf0/0xf0 [nfs]
Feb 3 03:45:23 pino kernel: [ 2931.912292] [<f855c4a5>] rpcauth_wrap_req+0x75/0xc0 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912351] [<f855ca07>] ? unx_marshal+0x47/0xc0 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912404] [<c01d9513>] ? mempool_alloc_slab+0x13/0x20
Feb 3 03:45:23 pino kernel: [ 2931.912460] [<f8553b6e>] call_transmit+0x14e/0x250 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912513] [<c01d978b>] ? mempool_alloc+0x3b/0xf0
Feb 3 03:45:23 pino kernel: [ 2931.912565] [<f855ad12>] __rpc_execute+0x52/0x2a0 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912618] [<c0167c23>] ? wake_up_bit+0x23/0x30
Feb 3 03:45:23 pino kernel: [ 2931.912668] [<f855b3b8>] rpc_execute+0x38/0x40 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912724] [<f8553fe9>] rpc_run_task+0x59/0x70 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912778] [<f85540fc>] rpc_call_sync+0x3c/0x60 [sunrpc]
Feb 3 03:45:23 pino kernel: [ 2931.912840] [<f865e283>] _nfs4_call_sync+0x23/0x30 [nfs]
Feb 3 03:45:23 pino kernel: [ 2931.912899] [<f865d0a6>] __nfs4_get_acl_uncached+0x186/0x290 [nfs]
Feb 3 03:45:23 pino kernel: [ 2931.912968] [<f865f6e4>] nfs4_xattr_get_nfs4_acl+0xe4/0x150 [nfs]
Feb 3 03:45:23 pino kernel: [ 2931.913028] [<c0240f96>] generic_getxattr+0x46/0x60
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0240f50>] ? xattr_resolve_name+0x80/0x80
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c02414f0>] vfs_getxattr+0x80/0xb0
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c02415ac>] getxattr+0x8c/0x110
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0230cda>] ? path_openat+0xca/0x350
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c01f7a01>] ? handle_pte_fault+0xe1/0x8e0
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0231071>] ? do_filp_open+0x31/0x80
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c022d39b>] ? putname+0x2b/0x40
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c022d39b>] ? putname+0x2b/0x40
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c022d39b>] ? putname+0x2b/0x40
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0222531>] ? do_sys_open+0x161/0x1b0
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c02416fb>] ? listxattr+0x5b/0xb0
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0241e76>] sys_fgetxattr+0x46/0x70
Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c047c39f>] sysenter_do_call+0x12/0x28
Feb 3 03:45:23 pino kernel: [ 2931.932919] ---[ end trace 2749b252593ffc7f ]---
Please let me know if you need any other information, or if I can do anything else to help (I'm not a programmer).
Regards,
Koen Wilde
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: oops when copying a file from a nfs mount
2012-02-03 22:36 oops when copying a file from a nfs mount koen
@ 2012-02-03 23:08 ` J. Bruce Fields
2012-02-03 23:24 ` Koen Wilde
2012-02-03 23:45 ` Myklebust, Trond
0 siblings, 2 replies; 6+ messages in thread
From: J. Bruce Fields @ 2012-02-03 23:08 UTC (permalink / raw)
To: koen; +Cc: Neil Brown, linux-nfs, Andy Adamson
On Fri, Feb 03, 2012 at 11:36:04PM +0100, koen@chillheid.nl wrote:
> Hi,
>
> Since updating from kernel 3.2.1 to 3.2.2, copying a file from a nfs mount
> using `cp` results in a kernel oops. Copying the same file with `cat
> /nfsmount/file > /local/file` gives no problems.
Hm, the oops is in getattr encoding, and doing a
gitk v3.2.1..v3.2.2 fs/nfs net/sunrpc
turns up one commit that modifies that code:
628fc192adbaae0c6178b9015fb916ce61d72b36 "NFSv4: include bitmap
in nfsv4 get acl data"
I haven't looked at that, but maybe the problem will be obvious to
Andy....
>
> I can reliably trigger the oops with a simple:
>
> cp /nfsmount/file /local/dir
>
> System information:
>
> % cat /proc/version
> Linux version 3.2.2-1-vanilla (koen@pino) (gcc version 4.6.2 20120120 (prerelease) (GCC) ) #1 SMP PREEMPT Fri Feb 3 01:51:55 CET 2012
>
> % zgrep '^CONFIG_NFS' /proc/config.gz
> CONFIG_NFS_FS=m
> CONFIG_NFS_V3=y
> CONFIG_NFS_V3_ACL=y
> CONFIG_NFS_V4=y
> CONFIG_NFS_FSCACHE=y
> CONFIG_NFS_USE_KERNEL_DNS=y
> CONFIG_NFSD=m
> CONFIG_NFSD_V2_ACL=y
> CONFIG_NFSD_V3=y
> CONFIG_NFSD_V3_ACL=y
> CONFIG_NFSD_V4=y
> CONFIG_NFS_ACL_SUPPORT=m
> CONFIG_NFS_COMMON=y
>
> % ./ver_linux
> Linux pino 3.2.2-1-vanilla #1 SMP PREEMPT Fri Feb 3 01:51:55 CET 2012 i686 Intel(R) Celeron(R) CPU E1200 @ 1.60GHz GenuineIntel GNU/Linux
>
> Gnu C 4.6.2
> Gnu make 3.82
> binutils 2.22.0.20111227
> util-linux 2.20.1
> mount support
> module-init-tools 4
> e2fsprogs 1.42
> jfsutils 1.1.15
> reiserfsprogs 3.6.21
> xfsprogs 3.1.7
> pcmciautils 018
> PPP 2.4.5
> Linux C Library 2.15
> Dynamic linker (ldd) 2.15
> Linux C++ Library 6.0.16
> Procps 3.2.8
> Net-tools 1.60
> Kbd 1.15.3
> Sh-utils 8.15
> Modules Loaded ipv6 ext3 jbd joydev snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device usbhid hid wacom snd_hda_codec_hdmi btusb bluetooth rfkill ppdev evdev snd_hda_codec_realtek radeon snd_hda_intel snd_hda_codec drm_kms_helper snd_pcm atl1 iTCO_wdt iTCO_vendor_support pcspkr ttm i2c_i801 serio_raw snd_page_alloc snd_hwdep snd_timer snd drm soundcore mii i2c_algo_bit i2c_core intel_agp intel_gtt agpgart floppy parport_pc parport asus_atk0110 nfs button nfs_acl lockd auth_rpcgss sunrpc fscache cpufreq_ondemand acpi_cpufreq mperf processor freq_table ext4 crc16 jbd2 mbcache dm_mod sd_mod pata_acpi ata_piix libata uhci_hcd scsi_mod ehci_hcd usbcore usb_common
>
> % grep nfs /proc/mounts
> servername:/data /data nfs4 rw,nosuid,nodev,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.16.1.84,minorversion=0,local_lock=none,addr=172.16.1.1 0 0
>
> Trace:
>
Is this really the start of the trace, or were there any lines before?
> Feb 3 03:45:23 pino kernel: [ 2931.910546] *pde = 00000000
> Feb 3 03:45:23 pino kernel: [ 2931.910626] Modules linked in: ipv6 ext3 jbd joydev snd_usb_audio snd_usbmidi_lib usbhid snd_rawmidi snd_seq_device hid wacom btusb bluetooth rfkill snd_hda_codec_hdmi ppdev radeon evdev snd_hda_codec_realtek drm_kms_helper ttm snd_hda_intel iTCO_wdt iTCO_vendor_support drm pcspkr snd_hda_codec serio_raw i2c_i801 snd_pcm snd_page_alloc snd_hwdep i2c_algo_bit i2c_core snd_timer intel_agp atl1 intel_gtt snd agpgart mii soundcore floppy parport_pc parport asus_atk0110 button nfs nfs_acl lockd auth_rpcgss sunrpc fscache cpufreq_ondemand acpi_cpufreq mperf processor freq_table ext4 crc16 jbd2 mbcache dm_mod sd_mod pata_acpi ata_piix libata scsi_mod uhci_hcd ehci_hcd usbcore usb_common
> Feb 3 03:45:23 pino kernel: [ 2931.911382]
> Feb 3 03:45:23 pino kernel: [ 2931.911400] Pid: 2003, comm: cp Not tainted 3.2.2-1-vanilla #1 System manufacturer System Product Name/P5B-MX
> Feb 3 03:45:23 pino kernel: [ 2931.911500] EIP: 0060:[<c01f3c00>] EFLAGS: 00010282 CPU: 1
> Feb 3 03:45:23 pino kernel: [ 2931.911552] EIP is at page_address+0x10/0xe0
> Feb 3 03:45:23 pino kernel: [ 2931.911592] EAX: 00000000 EBX: c6699dd8 ECX: f2c6b1e4 EDX: 00000038
> Feb 3 03:45:23 pino kernel: [ 2931.911648] ESI: 00000000 EDI: 00000000 EBP: c6699c18 ESP: c6699c08
> Feb 3 03:45:23 pino kernel: [ 2931.911704] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
> Feb 3 03:45:23 pino kernel: [ 2931.911839] 00001000 c6699dd8 00000000 c6699c78 c6699c54 f8666b45 00000000 00001000
> Feb 3 03:45:23 pino kernel: [ 2931.911934] 0000000e 00000000 00000002 f2c6b084 00000000 00000000 0000006e 00000000
> Feb 3 03:45:23 pino kernel: [ 2931.912028] f584c700 f59cde00 f8666ab0 c6699ca0 f855c4a5 f2c6b020 c6699c7c f855ca07
> Feb 3 03:45:23 pino kernel: [ 2931.912161] [<f8666b45>] nfs4_xdr_enc_getacl+0x95/0xc0 [nfs]
> Feb 3 03:45:23 pino kernel: [ 2931.912224] [<f8666ab0>] ? nfs4_xdr_enc_fs_locations+0xf0/0xf0 [nfs]
> Feb 3 03:45:23 pino kernel: [ 2931.912292] [<f855c4a5>] rpcauth_wrap_req+0x75/0xc0 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912351] [<f855ca07>] ? unx_marshal+0x47/0xc0 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912404] [<c01d9513>] ? mempool_alloc_slab+0x13/0x20
> Feb 3 03:45:23 pino kernel: [ 2931.912460] [<f8553b6e>] call_transmit+0x14e/0x250 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912513] [<c01d978b>] ? mempool_alloc+0x3b/0xf0
> Feb 3 03:45:23 pino kernel: [ 2931.912565] [<f855ad12>] __rpc_execute+0x52/0x2a0 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912618] [<c0167c23>] ? wake_up_bit+0x23/0x30
> Feb 3 03:45:23 pino kernel: [ 2931.912668] [<f855b3b8>] rpc_execute+0x38/0x40 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912724] [<f8553fe9>] rpc_run_task+0x59/0x70 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912778] [<f85540fc>] rpc_call_sync+0x3c/0x60 [sunrpc]
> Feb 3 03:45:23 pino kernel: [ 2931.912840] [<f865e283>] _nfs4_call_sync+0x23/0x30 [nfs]
> Feb 3 03:45:23 pino kernel: [ 2931.912899] [<f865d0a6>] __nfs4_get_acl_uncached+0x186/0x290 [nfs]
> Feb 3 03:45:23 pino kernel: [ 2931.912968] [<f865f6e4>] nfs4_xattr_get_nfs4_acl+0xe4/0x150 [nfs]
> Feb 3 03:45:23 pino kernel: [ 2931.913028] [<c0240f96>] generic_getxattr+0x46/0x60
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0240f50>] ? xattr_resolve_name+0x80/0x80
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c02414f0>] vfs_getxattr+0x80/0xb0
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c02415ac>] getxattr+0x8c/0x110
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0230cda>] ? path_openat+0xca/0x350
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c01f7a01>] ? handle_pte_fault+0xe1/0x8e0
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0231071>] ? do_filp_open+0x31/0x80
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c022d39b>] ? putname+0x2b/0x40
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c022d39b>] ? putname+0x2b/0x40
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c022d39b>] ? putname+0x2b/0x40
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0222531>] ? do_sys_open+0x161/0x1b0
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c02416fb>] ? listxattr+0x5b/0xb0
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c0241e76>] sys_fgetxattr+0x46/0x70
> Feb 3 03:45:23 pino kernel: [ 2931.913057] [<c047c39f>] sysenter_do_call+0x12/0x28
> Feb 3 03:45:23 pino kernel: [ 2931.932919] ---[ end trace 2749b252593ffc7f ]---
>
> Please let me know if you need any other information, or if I can do anything else to help (I'm not a programmer).
But I take it you're comfortable building a kernel from source? If so,
getting a stable git repo, then:
git checkout v3.2.2
git revert 628fc192adbaae0c6178b9015fb916ce61d72b36
and then testing the resulting kernel--it'd be interesting to know if
the bug goes away.
--b.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: oops when copying a file from a nfs mount
2012-02-03 23:08 ` J. Bruce Fields
@ 2012-02-03 23:24 ` Koen Wilde
2012-02-04 0:11 ` J. Bruce Fields
2012-02-03 23:45 ` Myklebust, Trond
1 sibling, 1 reply; 6+ messages in thread
From: Koen Wilde @ 2012-02-03 23:24 UTC (permalink / raw)
To: J. Bruce Fields; +Cc: Neil Brown, linux-nfs, Andy Adamson
On Fri, 3 Feb 2012 18:08:11 -0500, "J. Bruce Fields" <bfields@fieldses.org> wrote:
>
> Is this really the start of the trace, or were there any lines before?
>
This is really the start of the trace as it appears in syslog's logs. On
the physical screen it had some extra lines on top though (I'm typing this
over from a photo):
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<c01f3c00>] page_address+0x10/0xe0
<< continuing from here with the *pde line >>
> But I take it you're comfortable building a kernel from source? If so,
> getting a stable git repo, then:
>
> git checkout v3.2.2
> git revert 628fc192adbaae0c6178b9015fb916ce61d72b36
>
> and then testing the resulting kernel--it'd be interesting to know if
> the bug goes away.
Sure, I can build a kernel from source:) I'll get back to you with the
results.
-- Koen
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: oops when copying a file from a nfs mount
2012-02-03 23:08 ` J. Bruce Fields
2012-02-03 23:24 ` Koen Wilde
@ 2012-02-03 23:45 ` Myklebust, Trond
2012-02-04 13:37 ` Koen Wilde
1 sibling, 1 reply; 6+ messages in thread
From: Myklebust, Trond @ 2012-02-03 23:45 UTC (permalink / raw)
To: J. Bruce Fields
Cc: koen@chillheid.nl, Neil Brown, linux-nfs@vger.kernel.org,
Adamson, Andy
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: oops when copying a file from a nfs mount
2012-02-03 23:24 ` Koen Wilde
@ 2012-02-04 0:11 ` J. Bruce Fields
0 siblings, 0 replies; 6+ messages in thread
From: J. Bruce Fields @ 2012-02-04 0:11 UTC (permalink / raw)
To: Koen Wilde; +Cc: Neil Brown, linux-nfs, Andy Adamson
On Sat, Feb 04, 2012 at 12:24:27AM +0100, Koen Wilde wrote:
> On Fri, 3 Feb 2012 18:08:11 -0500, "J. Bruce Fields" <bfields@fieldses.org> wrote:
> >
> > Is this really the start of the trace, or were there any lines before?
> >
>
> This is really the start of the trace as it appears in syslog's logs. On
> the physical screen it had some extra lines on top though (I'm typing this
> over from a photo):
>
> BUG: unable to handle kernel NULL pointer dereference at (null)
> IP: [<c01f3c00>] page_address+0x10/0xe0
> << continuing from here with the *pde line >>
>
> > But I take it you're comfortable building a kernel from source? If so,
> > getting a stable git repo, then:
> >
> > git checkout v3.2.2
> > git revert 628fc192adbaae0c6178b9015fb916ce61d72b36
> >
> > and then testing the resulting kernel--it'd be interesting to know if
> > the bug goes away.
>
> Sure, I can build a kernel from source:) I'll get back to you with the
> results.
OK, but--probably ignore my suggestion and try applying Trond's patch
instead....
(Also, I assume mainline needs it as well as v3.2.2 ?)
--b.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: oops when copying a file from a nfs mount
2012-02-03 23:45 ` Myklebust, Trond
@ 2012-02-04 13:37 ` Koen Wilde
0 siblings, 0 replies; 6+ messages in thread
From: Koen Wilde @ 2012-02-04 13:37 UTC (permalink / raw)
To: Myklebust, Trond, J. Bruce Fields
Cc: Neil Brown, linux-nfs@vger.kernel.org, Adamson, Andy
On Fri, 3 Feb 2012 23:45:12 +0000, "Myklebust, Trond" <Trond.Myklebust@netapp.com> wrote:
> It is obvious: firstly acl_scratch is only needed (and allocated) if the
> npages > 1. Secondly, the call to xdr_set_scratch_buffer() needs to be
> done in the decoder, not the encoder...
>
> The following patch should fix it.
>
I can confirm the oops indeed doesn't occur anymore after applying this patch
to v3.2.2 :)
-- Koen
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-02-04 13:37 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-02-03 22:36 oops when copying a file from a nfs mount koen
2012-02-03 23:08 ` J. Bruce Fields
2012-02-03 23:24 ` Koen Wilde
2012-02-04 0:11 ` J. Bruce Fields
2012-02-03 23:45 ` Myklebust, Trond
2012-02-04 13:37 ` Koen Wilde
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