Kernel panic - not syncing: Fatal exception

[unix syzadmin]

Hi,

My redhat server (RHEL ES 4 Update 2) on HP IA64 platform, is hung.  I see
the following on the console.

Please help me to root cause the issue.

kernel BUG at mm/prio_tree.c:147!
javac[13521]: bugcheck! 0 [1]
Modules linked in: md5 ipv6 parport_pc lp parport autofs4 sunrpc ds
yenta_socket pcmcia_core vfat fat dm_mod button joydev ohci_hcd ehci_hcd
shpchp e1000 ext3 jbd cciss sd_mod scsi_mod

Pid: 13521, CPU 3, comm:                javac
psr : 0000101008026038 ifs : 8000000000000309 ip  : [<a0000001000dcec0>]
Not tainted
ip is at prio_tree_replace+0x1c0/0x1e0
unat: 0000000000000000 pfs : 0000000000000309 rsc : 0000000000000003
rnat: 8000000000000715 bsps: 0000000000000000 pr  : 49406065559aa555
ldrs: 0000000000000000 ccv : 0000000000000006 fpsr: 0009804c8a70033f
csd : 0000000000000000 ssd : 0000000000000000
b0  : a0000001000dcec0 b6  : a00000010006db40 b7  : a000000100256b40
f6  : 1003e0000000000001200 f7  : 1003e8080808080808081
f8  : 1003e00000000000023dc f9  : 1003e000000000e580000
f10 : 1003e00000000356f424c f11 : 1003e44b831eee7285baf
r1  : a00000010099d0e0 r2  : e0000000010345b8 r3  : e000000001040000
r8  : 0000000000000022 r9  : 0000000000000003 r10 : a0000001007b82d0
r11 : a0000001007b82d0 r12 : e000000111867d10 r13 : e000000111860000
r14 : 0000000000004000 r15 : a000000100732ac0 r16 : a000000100732ac8
r17 : e0000001fd177de8 r18 : 0000000000000001 r19 : 0000000000000006
r20 : 0000000000000006 r21 : 0000000000000006 r22 : 0000000000000001
r23 : 0000000000000000 r24 : 0000000000000000 r25 : 0000000000000006
r26 : e000000111860dd0 r27 : 0000000000000074 r28 : 0000000000000074
r29 : e00000011186002c r30 : e0000001fd17002c r31 : e0000000010345f0
Call Trace:
 [<a000000100016a60>] show_stack+0x80/0xa0
                                sp=e000000111867880 bsp=e0000001118613f0
 [<a000000100017370>] show_regs+0x890/0x8c0
                                sp=e000000111867a50 bsp=e0000001118613a8
 [<a00000010003d7f0>] die+0x150/0x240
                                sp=e000000111867a70 bsp=e000000111861368
 [<a00000010003d920>] die_if_kernel+0x40/0x60
                                sp=e000000111867a70 bsp=e000000111861338
 [<a00000010003dac0>] ia64_bad_break+0x180/0x600
                                sp=e000000111867a70 bsp=e000000111861310
 [<a00000010000f480>] ia64_leave_kernel+0x0/0x260
                                sp=e000000111867b40 bsp=e000000111861310
 [<a0000001000dcec0>] prio_tree_replace+0x1c0/0x1e0
                                sp=e000000111867d10 bsp=e0000001118612c8
 [<a0000001000dd140>] prio_tree_remove+0x260/0x2c0
                                sp=e000000111867d10 bsp=e0000001118612a0
 [<a0000001000de260>] vma_prio_tree_remove+0xa0/0x280
                                sp=e000000111867d10 bsp=e000000111861260
 [<a0000001000f87f0>] vma_adjust+0x210/0x7e0
                                sp=e000000111867d10 bsp=e0000001118611a0
 [<a0000001000facd0>] split_vma+0x250/0x3a0
                                sp=e000000111867d30 bsp=e000000111861150
 [<a0000001000faf70>] do_munmap+0x150/0xa80
                                sp=e000000111867d30 bsp=e0000001118610e0
 [<a0000001000fc180>] do_mmap_pgoff+0x400/0x1020
                                sp=e000000111867e00 bsp=e000000111861028
 [<a00000010003c560>] sys_mmap+0x300/0x3c0
                                sp=e000000111867e30 bsp=e000000111860f90
 [<a00000010000f320>] ia64_ret_from_syscall+0x0/0x20
                                sp=e000000111867e30 bsp=e000000111860f90
Kernel panic - not syncing: Fatal exception


Thanks & Regards,
-GnanaShekar-