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systemtap crashed the kernel


I consistently run into the following coredump while I have
my script running to monitor NFS traffic. The core stack is 
as following:

crash> bt
PID: 0      TASK: ffffffff803d4300  CPU: 0   COMMAND: "swapper"
 #0 [ffffffff80456ba0] start_disk_dump at ffffffffa07a036d
 #1 [ffffffff80456bd0] try_crashdump at ffffffff8014bd01
 #2 [ffffffff80456be0] do_page_fault at ffffffff80124143
 #3 [ffffffff80456c60] ip_local_deliver_finish at ffffffff802c8f28
 #4 [ffffffff80456c80] nf_hook_slow at ffffffff802b92fe
 #5 [ffffffff80456cc0] error_exit at ffffffff80110d91
    [exception RIP: bnx2_poll+240]
    RIP: ffffffffa00e4b28  RSP: ffffffff80456d78  RFLAGS: 00010206
    RAX: 0000000000007baa  RBX: 00000101265f7a60  RCX: 0000010122294000
    RDX: ffffffff804e5080  RSI: 0000000000007ba9  RDI: 00000000000000a6
    RBP: 0000000000000000   R8: 0000010005f6c270   R9: 0000000000000040
    R10: 0000000000000040  R11: 0000000000000088  R12: 0000010129179b80
    R13: 0000000000007ba6  R14: 0000000000000120  R15: 0000000000000012
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #6 [ffffffff80456df0] bnx2_start_xmit at ffffffffa00e81c8
 #7 [ffffffff80456e90] net_rx_action at ffffffff802b0884
 #8 [ffffffff80456ec0] __do_softirq at ffffffff8013c738
 #9 [ffffffff80456ef0] do_softirq at ffffffff8013c7e1
#10 [ffffffff80456f00] do_IRQ at ffffffff80113247
--- <IRQ stack> ---
#11 [ffffffff804e9f08] ret_from_intr at ffffffff80110833
    [exception RIP: mwait_idle+86]
    RIP: ffffffff8010e84c  RSP: ffffffff804e9fb8  RFLAGS: 00000246
    RAX: 0000000000000000  RBX: 0000000000000000  RCX: 0000000000000000
    RDX: 0000000000000000  RSI: ffffffff803d4300  RDI: 00000100010427e0
    RBP: 0000000000000000   R8: ffffffff804e8000   R9: 0000000000000008
    R10: 0000000000000040  R11: 0000000000000088  R12: 0000000000000000
    R13: 0000000000000000  R14: 0000000000000000  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffd9  CS: 0010  SS: 0018
#12 [ffffffff804e9fb8] cpu_idle at ffffffff8010e7dc

I can reproduce this with "version 0.5.8 built 2006-07-14" and earlier
version that comes with redhat 4 update 3. Is this a known issue? Any

John Liang

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