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    Subject[Bug 601] New: BUG when running ipcs after huge page shm

    Summary: BUG when running ipcs after huge page shm
    Kernel Version: 2.5.67-bk current
    Status: NEW
    Severity: normal

    Hardware Environment: 2-way PIII-550, 2GB ram
    Software Environment:

    Problem Description:

    kernel BUG at include/asm/spinlock.h:123!
    invalid operand: 0000 [#1]
    CPU: 0
    EIP: 0060:[<c02055ad>] Not tainted
    EFLAGS: 00010286
    EIP is at shm_get_stat+0x5d/0xbc
    eax: 0000000e ebx: f772e14c ecx: c04a1be0 edx: c0411d88
    esi: f772e1b0 edi: 00000000 ebp: f747df38 esp: f747dde4
    ds: 007b es: 007b ss: 0068
    Process ipcs (pid: 778, threadinfo=f747c000 task=f762e100)
    Stack: c03a9ab7 c0205595 f747df2c bffff620 f747df44 c050bfb0 c0205801 f747df34
    f747df38 bffff5bc 0000000e 00000000 00000000 00000000 00000000 00000000
    00000001 00000001 00000019 00000000 00000000 c0512bc0 f7c181cc f7c181bc
    Call Trace:
    [<c0205595>] shm_get_stat+0x45/0xbc
    [<c0205801>] sys_shmctl+0x1f5/0x820
    [<c013a1e0>] check_poison_obj+0x38/0x188
    [<c013baa6>] kmem_cache_alloc+0x126/0x134
    [<c01483b2>] page_add_rmap+0x12/0x158
    [<c0143e26>] do_no_page+0x47a/0x488
    [<c014401d>] handle_mm_fault+0x105/0x220
    [<c01168b0>] do_page_fault+0x120/0x45d
    [<c0116790>] do_page_fault+0x0/0x45d
    [<c0215ef1>] tty_write+0x33d/0x378
    [<c021b298>] write_chan+0x0/0x20c
    [<c010f918>] sys_ipc+0x1d4/0x1ec
    [<c0109a2d>] error_code+0x2d/0x38
    [<c0108fa3>] syscall_call+0x7/0xb

    Code: 0f 0b 7b 00 a0 9a 3a c0 83 c4 08 f0 fe 0b 0f 88 04 0d 00 00

    Steps to reproduce:
    echo 10 > /proc/sys/vm/nr_hugepages
    ran a quick test program that used shm to allocate 8MB with SHM_HUGETLB
    run the 'ipcs' command

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      Last update: 2005-03-22 13:34    [W:0.023 / U:5.388 seconds]
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