Re: Kernel oops in reiserfs xattr

[Jeff Mahoney <jeffm@suse.com>]

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Gad Kadosh wrote:
> Hi,
> 
> I've been using xattr with beagle for a long time, and recently I get
> all the time kernel oops. attached is the log, can someone help me
> solve the problem ?

Hi Gad -

There's a few things that are wonky with this trace that point outside
of reiserfs xattrs, and in the direction of a general system problem.

What's happening is that reiserfs_xattr_get() is trying to warn you that
you have either a bad magic or a bad checksum for an xattr. This usually
indicates some form of corruption has occured, and the user would be
alerted by an -EIO and by checking the system log for the warning itself.

The fact that the printing the warning is what's causing the Oops points
me to a general system problem. INODE_PKEY(inode) for a reiserfs inode
should always be valid. The oops occurs in sprintf_le_key(), which means
that INODE_KEY(inode) is invalid.

> By the way this is with kernel 2.6.17-rc5, tried with other 2.6.17-rcX
> and also 2.6.16.

So can you reproduce with other versions? I'm not certain what you mean
here.

- -Jeff

> May 28 10:26:51 ibook Unable to handle kernel paging request for data
> at address 0x6372525a
> May 28 10:26:51 ibook Faulting instruction address: 0xc00c35d4
> May 28 10:26:51 ibook Oops: Kernel access of bad area, sig: 11 [#1]
> May 28 10:26:51 ibook
> May 28 10:26:51 ibook Modules linked in: radeon drm rfcomm l2cap
> hci_usb snd_seq snd_seq_device snd_powermac snd_pcm snd_timer snd
> soundcore snd_page_alloc bluetooth cpufreq_userspace therm_adt746x
> i2c_powermac evdev eth1394 appletouch usbhid bcm43xx firmware_class
> ieee80211softmac ieee80211 ieee80211_crypt ide_cd ehci_hcd ohci_hcd
> usbcore cdrom uninorth_agp agpgart ohci1394 sungem ieee1394 sungem_phy
> unix
> May 28 10:26:51 ibook NIP: C00C35D4 LR: C00C3EB8 CTR: C00C3E7C
> May 28 10:26:51 ibook REGS: d2a51b90 TRAP: 0300   Not tainted  (2.6.17-rc4)
> May 28 10:26:51 ibook MSR: 00009032 <EE,ME,IR,DR>  CR: 44042448  XER:
> 00000000
> May 28 10:26:51 ibook DAR: 6372525A, DSISR: 40000000
> May 28 10:26:51 ibook TASK = d3f7d330[8065] 'beagled' THREAD: d2a50000
> May 28 10:26:51 ibook GPR00: C00C3EB8 D2A51C40 D3F7D330 C028A529
> 6372525A C028A8E8 D2A51CB8 6372525A
> May 28 10:26:51 ibook GPR08: 00000017 D2A51CC0 C028A914 00000004
> 24042444 1019C188 00000001 00000000
> May 28 10:26:51 ibook GPR16: 00000001 C9BCDDA0 00000011 15212B37
> 41584652 C165EE5C C1656354 D2A51DA8
> May 28 10:26:51 ibook GPR24: 00000000 C16563A4 C028A4E8 C028A529
> D2A51CB8 C028A529 00000001 6372525A
> May 28 10:26:51 ibook NIP [C00C35D4] sprintf_le_key+0x1c/0x834
> May 28 10:26:51 ibook LR [C00C3EB8] prepare_error_buf+0xcc/0x6f4
> May 28 10:26:51 ibook Call Trace:
> May 28 10:26:51 ibook [D2A51C40] [C16563A4] 0xc16563a4 (unreliable)
> May 28 10:26:51 ibook [D2A51C60] [C00C3EB8] prepare_error_buf+0xcc/0x6f4
> May 28 10:26:51 ibook [D2A51CB0] [C00C356C] reiserfs_warning+0x58/0xa4
> May 28 10:26:51 ibook [D2A51CF0] [C00DD2B0] reiserfs_xattr_get+0x1f4/0x218
> May 28 10:26:51 ibook [D2A51D40] [C00DD694] user_get+0x60/0x7c
> May 28 10:26:51 ibook [D2A51D60] [C00DC848] reiserfs_getxattr+0xc0/0x160
> May 28 10:26:51 ibook [D2A51D80] [C008E95C] vfs_getxattr+0x7c/0x84
> May 28 10:26:51 ibook [D2A51DA0] [C008E9E0] getxattr+0x7c/0x178
> May 28 10:26:51 ibook [D2A51ED0] [C008EB90] sys_lgetxattr+0x50/0x74
> May 28 10:26:51 ibook [D2A51F40] [C000F524] ret_from_syscall+0x0/0x38
> May 28 10:26:51 ibook --- Exception: c01 at 0xfd6fa54
> May 28 10:26:51 ibook LR = 0xfa2ce90
> May 28 10:26:51 ibook Instruction dump:
> May 28 10:26:51 ibook 80010044 7c0803a6 83e1003c 38210040 4e800020
> 9421ffe0 7c0802a6 bf61000c
> May 28 10:26:51 ibook 90010024 7c7d1b78 7c9f2379 41820744 <801f0000>
> 5409463e 7d3b4b78 501bc42e




- -Jeff

- --
Jeff Mahoney
SUSE Labs
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