Re: 2.6.22.14 oops msg with commvault galaxy ?

From: Randy Dunlap
Date: Mon Dec 10 2007 - 12:16:24 EST

On Mon, 10 Dec 2007 09:03:17 -0500 Fortier,Vincent [Montreal] wrote:

Ingo, can you look at this, please?
Vincent is getting oopses on 2.6.22.14-cfs-etch.

Vincent, did you apply the cfs patch or did Debian etch provide that?
If you applied it, did you use
http://people.redhat.com/mingo/cfs-scheduler/sched-cfs-v2.6.22.13-v24.patch
or a different patch?


> > -----Message d'origine-----
> > De : linux-kernel-owner@xxxxxxxxxxxxxxx
> > [mailto:linux-kernel-owner@xxxxxxxxxxxxxxx] De la part de
> > Fortier,Vincent [Montreal]
> > Envoyé : 10 décembre 2007 08:21
> > À : Randy Dunlap; Andrew Morton
> > Cc : linux-kernel@xxxxxxxxxxxxxxx
> > Objet : RE: 2.6.22.14 oops msg with commvault galaxy ?
> >
> > > -----Message d'origine-----
> > > De : Randy Dunlap [mailto:randy.dunlap@xxxxxxxxxx] Envoyé :
> > 7 décembre
> > > 2007 20:15
> > >
> > > On Fri, 7 Dec 2007 15:11:13 -0800 Andrew Morton wrote:
> > >
> > > > On Fri, 7 Dec 2007 14:15:36 -0800
> > > > Randy Dunlap <randy.dunlap@xxxxxxxxxx> wrote:
> > > >
> > > > > > Help would really be appreciated.
> > > > >
> > > > > Let's try the last_sysfs_file (name) patch.
> > > > > I've attempted to update it for 2.6.22.14.
> > > > > Andrew, does this change in fs/sysfs/file.c look OK?
> > > >
> > > > umm, yup.
> > > >
> > > >
> > >
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21-r
> > > >
> > >
> > c6/2.6.21-rc6-mm1/broken-out/gregkh-driver-sysfs-crash-debugging.patch
> > > >
> > > > should work.
> > >
> > > Thanks.
> > > I produced a cleanly applying version of it for 2.6.22.14.
> > >
> > > Vincent, please apply this patch so we can know which file in sysfs
> > > these oopses are happening with.
> > >
> >
> > It did not applied cleanly on a 2.6.22.14... copy/paste might
> > be the issue here... Anyhow, I corrected the patch failure to
> > apply and here is my version of it... Hoping I got this
> > (attached patch).
> >
> > Compiling at the moment... will try this out with commvault
> > 5.9 probably in the morning and get back with the results.
> >
> > Let me know I got the patch wrong.
>
> Here is the resulting trace... hoping this helps...:
>
> [ 942.107304] BUG: unable to handle kernel NULL pointer dereference at virtual address 000000c8
> [ 942.107339] printing eip:
> [ 942.107354] c01a924c
> [ 942.107368] *pdpt = 000000002d6b4001
> [ 942.107383] *pde = 0000000000000000
> [ 942.107401] Oops: 0000 [#1]
> [ 942.107414] SMP
> [ 942.107431] last sysfs file: /kernel/uids/104/cpu_share
> [ 942.107449] Modules linked in: xfs drbd cn nfs nfsd exportfs lockd nfs_acl sunrpc ppdev parport_pc lp parport button ac battery ipv6 fuse ide_cd ide_generic usbkbd usbmouse tsdev sg iTCO_wdt iTCO_vendor_support e752x_edac edac_mc psmouse floppy shpchp pci_hotplug serio_raw sr_mod pcspkr evdev cdrom ext3 jbd mbcache dm_mirror dm_snapshot dm_mod generic piix ide_core ehci_hcd uhci_hcd usbcore ata_piix tg3 thermal processor fan mptscsih mptbase megaraid_sas megaraid_mbox megaraid_mm cciss aacraid
> [ 942.107675] CPU: 0
> [ 942.107676] EIP: 0060:[<c01a924c>] Not tainted VLI
> [ 942.107678] EFLAGS: 00010202 (2.6.22.14-cfs-etch-686-envcan #1)
> [ 942.107730] EIP is at sysfs_open_file+0xae/0x21e
> [ 942.107749] eax: 00000000 ebx: f77783b8 ecx: dfb0b280 edx: 000000c8
> [ 942.107769] esi: f7e0ce8c edi: c03fd5c0 ebp: c01a919e esp: f1257ed8
> [ 942.107789] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
> [ 942.107810] Process clBackup (pid: 5191, ti=f1256000 task=f71b3290 task.ti=f1256000)
> [ 942.107831] Stack: 00001000 f295d240 ed4f4ac0 f7e0ce48 f295d240 ed4f4ac0 f1257f30 c01a919e
> [ 942.107878] c0170464 dfe76100 ed4f3880 f295d240 00008000 f1257f30 00000010 c0170595
> [ 942.107921] f295d240 00000000 00000000 c01705d6 00000000 f1257f30 ed4f3880 dfe76100
> [ 942.107968] Call Trace:
> [ 942.107998] [<c01a919e>] sysfs_open_file+0x0/0x21e
> [ 942.108017] [<c0170464>] __dentry_open+0xc1/0x178
> [ 942.108039] [<c0170595>] nameidata_to_filp+0x24/0x33
> [ 942.108063] [<c01705d6>] do_filp_open+0x32/0x39
> [ 942.108088] [<c0170343>] get_unused_fd+0x4a/0xaa
> [ 942.108112] [<c017061f>] do_sys_open+0x42/0xc3
> [ 942.108134] [<c01706d9>] sys_open+0x1c/0x1e
> [ 942.108155] [<c0103d8a>] syscall_call+0x7/0xb
> [ 942.108179] =======================
> [ 942.108194] Code: b8 c0 c5 3f c0 41 e8 e8 06 03 00 83 7c 24 0c 00 0f 84 72 01 00 00 85 f6 0f 84 6a 01 00 00 8b 56 04 85 d2 74 19 64 a1 08 50 3d c0 <83> 3a 02 0f 84 44 01 00 00 c1 e0 05 ff 84 10 20 01 00 00 8b 54
> [ 942.108364] EIP: [<c01a924c>] sysfs_open_file+0xae/0x21e SS:ESP 0068:f1257ed8


This oops in sysfs_open_file() is on

if (!try_module_get(attr->owner)) {
error = -ENODEV;
goto Done;
}

but attr->owner == 0xc8.

---
~Randy
Features and documentation: http://lwn.net/Articles/260136/
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