#169 kernel BUG at ipc/shm.c:166!

[John Hughes]

Don't know how to replicate, but I've seen this one at least once: (This is with my 2.6.12 based kernel).

kernel BUG at ipc/shm.c:166!
invalid operand: 0000 [#1]
SMP
Modules linked in: iptable_filter ipt_state iptable_nat ip_conntrack ip_tables ppdev parport_pc lp parport button ac battery floppy pcspkr divas divadidd i2c_i801 i2c_core ehci_hcd uhci_hcd shpchp kqemu ext3 jbd sr_mod sd_mod mptsas mptscsih mptbase scsi_mod tg3 e1000
CPU: 0
EIP: 0060:[<c01dc7e6>] Not tainted VLI
EFLAGS: 00010246 (2.6.12-ssi-jh5)
EIP is at shm_mmap+0x76/0x80
eax: 00000000 ebx: c32f9180 ecx: 00000003 edx: 00000000
esi: 00060000 edi: ffffffea ebp: dad28ec0 esp: dad28eb4
ds: 007b es: 007b ss: 0068
Process xterm (pid: 106292, threadinfo=dad28000 task=de219260)
Stack: c07443c0 01f6005f f59dcb1c dad28f1c c0163a30 c32f9180 f59dcb1c dad28f04
dad28f08 dad28f0c f635be68 dad28eec f635be44 00000246 00000000 00000001
00000000 001000f9 d5b28424 f707ae00 c9caa43c c9caa45c c9caa454 00000000
Call Trace:
[<c01079ff>] show_stack+0x7f/0xa0
[<c0107ba4>] show_registers+0x164/0x230
[<c0107f54>] die+0xf4/0x1a0
[<c0108086>] do_trap+0x86/0xd0
[<c0108378>] do_invalid_op+0xb8/0xd0
[<c010761b>] error_code+0x4f/0x54
[<c0163a30>] do_mmap_pgoff+0x3d0/0x7b0
[<c01dda99>] do_shmat+0x2d9/0x680
[<c010eaa2>] sys_ipc+0x1e2/0x350
[<c0106a41>] syscall_call+0x7/0xb
Code: 80 94 00 00 00 ff 42 38 89 42 48 89 14 24 e8 52 a2 ff ff 83 c4 08 31 c0 5b 5d c3 8b 43 08 8b 40 10 89 04 24 e8 6c 40 fb ff eb 9a <0f> 0b a6 00 81 d3 49 c0 eb b9 55 89 e5 83 ec 30 89 75 f8 8b 45