Kernel BUG at mm/mmap.c:2157 in exit_mmap()

Issue

System panics with the following BUG():

Kernel BUG at mm/mmap.c:2157
invalid opcode: 0000 [1] SMP 
last sysfs file: /class/net/lo/statistics/tx_bytes
CPU 8 
Modules linked in: joydev nfs nfs_acl mptctl mptbase lockd sunrpc bonding ipv6 xfrm_nalgo crypto_api ext4 jbd2 crc16 dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec i2c_core dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport sr_mod cdrom sg e1000e(U) nx_nic(U) tpm_tis tpm tpm_bios 8021q i7core_edac hpilo surfe(U) serio_raw edac_mc pcspkr dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod ata_piix libata shpchp cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 31784, comm: hpetfe Tainted: G     ---- 2.6.18-308.el5 #1
RIP: 0010:[<ffffffff80039ef8>]  [<ffffffff80039ef8>] exit_mmap+0xf1/0x104
RSP: 0018:ffff810273b71ec8  EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff81044e0a0420 RCX: ffff81010c8e7028
RDX: ffff8103f9904840 RSI: ffff81043643e818 RDI: ffff81044001a450
RBP: 0000000000000000 R08: ffff810c4e14d000 R09: ffff81044001a440
R10: 0000000000000296 R11: 0000000000000000 R12: ffff8103f9904840
R13: 0000000000000000 R14: 00000000188fc170 R15: 00000000188fc1a0
FS:  0000000000000000(0000) GS:ffff81044e2d47c0(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002aeb40f080a0 CR3: 0000000000201000 CR4: 00000000000006a0
Process hpetfe (pid: 31784, threadinfo ffff810273b70000, task ffff8102864d57e0)
Stack:  00000000000000a6 ffff81044e0a0420 ffff8103f9904840 ffff8103f99048c8
 0000000000000001 ffffffff8003c01d 00000031ea94e870 00000031ea94e870
 ffff8102864d57e0 ffffffff800158e8 c000003e000000e7 0000000000000000
Call Trace:
 [<ffffffff8003c01d>] mmput+0x30/0x82
 [<ffffffff800158e8>] do_exit+0x2e7/0x931
 [<ffffffff80048e75>] cpuset_exit+0x0/0x88
 [<ffffffff8005d28d>] tracesys+0xd5/0xe0