kernel BUG at mm/slab.c:1695!

Not sure if this is an oops, or what. I've been getting these errors frequently when trying to move large directories through scp. The command that triggered this trace is:
scp -r tanis:/mnt/data/media/music .
It seems random, but not sure yet. Earlier I scp'ied another large dir, got a similar error, and then my second try seemed to work successfully?!? . . .

Here is the stack trace:
-----------------

------------[ cut here ]------------
kernel BUG at mm/slab.c:1695!
invalid operand: 0000 [#1]
CPU:    0
EIP:    0060:[<c014b4e6>]    Not tainted
EFLAGS: 00010002

EIP is at cache_alloc_refill+0x1b6/0x410
eax: 00000003 ebx: 0000003d ecx: d1b1d000 edx: d1b1d018
esi: 0000003e edi: d1b1d018 ebp: dcaabd5c esp: dcaabd24
ds: 007b es: 007b ss: 0068
Process scp (pid: 254, threadinfo=dcaaa000 task=dcad6000)

Stack: 00000000 df7ed920 00000286 df7de014 0000003d df7ed92c 0000003d 
df7ed92c
        d1b1d000 df7ed934 00000296 d1b1d018 df7de004 00000002 dcaabd80 
c014bb75
        df7ed920 00000050 00000000 00000000 00001000 00000472 c12c6be0 
dcaabd98
Call Trace:
  [<c014bb75>] kmem_cache_alloc+0x65/0x180
  [<c016bf14>] alloc_buffer_head+0x14/0x50
  [<c01692db>] create_buffers+0x1b/0x90
  [<c0169ed8>] create_empty_buffers+0x18/0x1d0
  [<c01e5f2c>] reiserfs_prepare_file_region_for_write+0xfc/0x8e0
  [<c01fb096>] journal_end+0x16/0x20
  [<c01e6b84>] reiserfs_file_write+0x474/0x687
  [<c0176795>] pipe_read+0x205/0x220
  [<c0165f5e>] vfs_write+0x9e/0xd0
  [<c0166010>] sys_write+0x30/0x50
  [<c0109c67>] syscall_call+0x7/0xb
  Code: 0f 0b 9f 06 37 05 32 c0 89 f6 85 c0 7c 04 39 d8 72 08 0f 0b
  <6>note: scp[254] exited with preempt_count 1
Debug: sleeping function called from illegal context at include/asm/
semaphore.h:119
Call Trace:
  [<c011ed13>] __might_sleep+0x63/0x70
  [<c015664b>] remove_shared_vm_struct+0x2b/0x80
  [<c01584cc>] exit_mmap+0x1fc/0x240
  [<c011f8cd>] mmput+0xdd/0x100
  [<c0125136>] do_exit+0x2a6/0x9b0
  [<c010ad6c>] die+0x1cc/0x1d0
  [<c010af90>] do_invalid_op+0x0/0x90
  [<c010b009>] do_invalid_op+0x79/0x90
  [<c014b4e6>] cache_alloc_refill+0x1b6/0x410
  [<c024ee7c>] tulip_interrupt+0xa9c/0xb10
  [<c02906e0>] netif_receive_skb+0x170/0x1c0
  [<c029079f>] process_backlog+0x6f/0x100
  [<c02908a2>] net_rx_action+0x72/0x130
  [<c010a671>] error_code+0x2d/0x38
  [<c014b4e6>] cache_alloc_refill+0x1b6/0x410
  [<c014bb75>] kmem_cache_alloc+0x65/0x180
  [<c016bf14>] alloc_buffer_head+0x14/0x50
  [<c01692db>] create_buffers+0x1b/0x90
  [<c0169ed8>] create_empty_buffers+0x18/0x1d0
  [<c01e5f2c>] reiserfs_prepare_file_region_for_write+0xfc/0x8e0
  [<c01fb096>] journal_end+0x16/0x20
  [<c01e6b84>] reiserfs_file_write+0x474/0x687
  [<c0176795>] pipe_read+0x205/0x220
  [<c0165f5e>] vfs_write+0x9e/0xd0
  [<c0166010>] sys_write+0x30/0x50
  [<c0109c67>] syscall_call+0x7/0xb
  mm/slab.c:2406: spin_lock(mm/slab.c:df7ed964) already locked by mm/

slab.c/1751
------------------------------

/proc/cpuinfo:
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 8
model name : AMD Athlon(tm) XP 1700+
stepping : 0
cpu MHz : 1462.078
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat
pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips : 2875.39

-----------------------------
lspci:
00:00.0 Host bridge: VIA Technologies, Inc. VT8361 [KLE133] Host Bridge 00:01.0 PCI bridge: VIA Technologies, Inc. VT8361 [KLE133] AGP Bridge 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40)
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586/B/686A/B PIPC Bus Master IDE (rev 06)
00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 1a) 00:07.3 USB Controller: VIA Technologies, Inc. USB (rev 1a) 00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller (rev 50)
00:08.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08)
00:08.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 08)
00:0f.0 Ethernet controller: Linksys Network Everywhere Fast Ethernet 10/100 model NC100 (rev 11)
01:00.0 VGA compatible controller: Trident Microsystems CyberBlade/i1
-------------------------

Please Advise!!
jak