[Oops] 2.4.22-ac1 XFS access error?

[Paco Ros]

Hi!

I'm using 2.4.22-ac1 on a XFS partition and, some minutes ago, I haven't been able to login as regular user neither using Konsole, neither using a tty.
I've reastarded any services running with unsuccesfully and, finally, rebooted.

Here is the log at syslog:
Sep  9 23:55:19 wanda kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Sep  9 23:55:19 wanda kernel:  printing eip:
Sep  9 23:55:19 wanda kernel: c02ffc32
Sep  9 23:55:19 wanda kernel: *pde = 00000000
Sep  9 23:55:19 wanda kernel: Oops: 0002
Sep  9 23:55:19 wanda kernel: CPU:    0
Sep  9 23:55:19 wanda kernel: EIP:    0010:[rwsem_down_failed_common+50/112]    Tainted: PF
Sep  9 23:55:19 wanda kernel: EFLAGS: 00010286
Sep  9 23:55:19 wanda kernel: eax: ffffffff   ebx: d07d5658   ecx: 00000000   edx: ffffffff
Sep  9 23:55:19 wanda kernel: esi: c39ee000   edi: c39efed4   ebp: d55b6ec0   esp: c39efeb4
Sep  9 23:55:19 wanda kernel: ds: 0018   es: 0018   ss: 0018
Sep  9 23:55:19 wanda kernel: Process bash (pid: 32026, stackpage=c39ef000)
Sep  9 23:55:19 wanda kernel: Stack: d44fe00d d07d5658 d07d5658 d07d55dc c02ffb29 d07d5658 c39efed4 ffffffff
Sep  9 23:55:19 wanda kernel:        d07d565c 00000000 c39ee000 00000002 00000000 c0139d4f 00000000 d44fe01a
Sep  9 23:55:19 wanda kernel:        c0144925 00000000 00000000 00008202 db5f3370 00000000 c021697d dfdcd800
Sep  9 23:55:19 wanda kernel: Call Trace:    [rwsem_down_write_failed+41/64] [.text.lock.open+6/55] [link_path_walk+1333/1664] [xfs_access+77/96] [linvfs_permission+41/48]
Sep  9 23:55:19 wanda kernel:   [open_namei+548/1456] [filp_open+62/112] [sys_open+83/160] [system_call+51/56]
Sep  9 23:55:19 wanda kernel:
Sep  9 23:55:19 wanda kernel: Code: 89 39 0f c1 03 01 d0 66 85 c0 74 25 89 f6 8b 47 0c 85 c0 74

Please, could anybody give me a brief explanation about what has hapenned?

Thanks in advance.
Cheers.
-- 
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