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    SubjectBUG in filp_close() (was: Re: 2.6.19-rc1-mm1)
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    Date
    On Tue, 2006-10-10 at 00:09 -0700, Andrew Morton wrote:
    > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.19-rc1/2.6.19-rc1-mm1/

    I'm seeing an exception in filp_close(), called from sys_dup2(). I have
    only seen it when I try to start up a java application (Lotus
    Workplace).

    I suspect that it may be related to the fdtable work, but I haven't
    investigated it too closely.

    > +fdtable-delete-pointless-code-in-dup_fd.patch
    > +fdtable-make-fdarray-and-fdsets-equal-in-size.patch
    > +fdtable-remove-the-free_files-field.patch
    > +fdtable-implement-new-pagesize-based-fdtable-allocator.patch
    >
    > Redo the fdtable code.

    BUG: unable to handle kernel paging request at virtual address 3237304a
    printing eip:
    c015636f
    *pde = 00000000
    Oops: 0000 [#1]
    PREEMPT
    last sysfs file: /block/hda/hda5/stat
    Modules linked in: irda crc_ccitt tun airo e1000 pcmcia yenta_socket rsrc_nonstatic pcmcia_core radeon rtc ntfs jfs
    CPU: 0
    EIP: 0060:[<c015636f>] Not tainted VLI
    EFLAGS: 00010206 (2.6.19-rc1-mm1 #1)
    EIP is at filp_close+0xc/0x5e
    eax: 00000000 ebx: 32373036 ecx: cbc66000 edx: 00000000
    esi: 00000001 edi: dff0cc80 ebp: cbc67f8c esp: cbc67f80
    ds: 007b es: 007b ss: 0068
    Process java (pid: 12945, ti=cbc66000 task=ce9d6b00 task.ti=cbc66000)
    Stack: 0000020c 00000001 cef765c0 cbc67fb4 c01623ed 32373036 dff0cc80 dff0cca4
    32373036 dff0cc80 00000007 00000000 fffffff4 cbc66000 c0102e05 00000007
    0000020c 00000000 00000000 fffffff4 bf966c14 0000003f 0000007b c03b007b
    Call Trace:
    [<c01623ed>] sys_dup2+0xdb/0x10f
    [<c0102e05>] sysenter_past_esp+0x56/0x79
    DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x79
    Leftover inexact backtrace:
    =======================
    Code: 26 00 8b 43 04 8b 40 0c 0f b3 30 3b 73 4c 73 03 89 73 4c 89 f8 e8 c0 51 26 00 5b 5e 5f 5d c3 55 89 e5 57 8b 7d 0c 56 53 8b 5d 08 <8b> 43 14 85 c0 75 0f 68 a1 e8 3f c0 31 f6 e8 54 35 fc ff 59 eb
    EIP: [<c015636f>] filp_close+0xc/0x5e SS:ESP 0068:cbc67f80
    <1>BUG: unable to handle kernel paging request at virtual address 02404e7c
    printing eip:
    c015636f
    *pde = 00000000
    Oops: 0000 [#2]
    PREEMPT
    last sysfs file: /block/hda/hda5/stat
    Modules linked in: irda crc_ccitt tun airo e1000 pcmcia yenta_socket rsrc_nonstatic pcmcia_core radeon rtc ntfs jfs
    CPU: 0
    EIP: 0060:[<c015636f>] Not tainted VLI
    EFLAGS: 00010202 (2.6.19-rc1-mm1 #1)
    EIP is at filp_close+0xc/0x5e
    eax: 00000000 ebx: 02404e68 ecx: cc636000 edx: 00000000
    esi: 00000001 edi: dfcfecc0 ebp: cc637f8c esp: cc637f80
    ds: 007b es: 007b ss: 0068
    Process java (pid: 13593, ti=cc636000 task=ce97f550 task.ti=cc636000)
    Stack: 0000020c 00000001 cbc56b80 cc637fb4 c01623ed 02404e68 dfcfecc0 dfcfece4
    02404e68 dfcfecc0 00000007 00000000 fffffff4 cc636000 c0102e05 00000007
    0000020c 00000000 00000000 fffffff4 bfc5f704 0000003f 0000007b c03b007b
    Call Trace:
    [<c01623ed>] sys_dup2+0xdb/0x10f
    [<c0102e05>] sysenter_past_esp+0x56/0x79
    DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x79
    Leftover inexact backtrace:
    =======================
    Code: 26 00 8b 43 04 8b 40 0c 0f b3 30 3b 73 4c 73 03 89 73 4c 89 f8 e8 c0 51 26 00 5b 5e 5f 5d c3 55 89 e5 57 8b 7d 0c 56 53 8b 5d 08 <8b> 43 14 85 c0 75 0f 68 a1 e8 3f c0 31 f6 e8 54 35 fc ff 59 eb
    EIP: [<c015636f>] filp_close+0xc/0x5e SS:ESP 0068:cc637f80
    <1>BUG: unable to handle kernel NULL pointer dereference at virtual address 00000127
    printing eip:
    c01874ca
    *pde = 00000000
    Oops: 0000 [#3]
    PREEMPT
    last sysfs file: /block/hda/hda5/stat
    Modules linked in: irda crc_ccitt tun airo e1000 pcmcia yenta_socket rsrc_nonstatic pcmcia_core radeon rtc ntfs jfs
    CPU: 0
    EIP: 0060:[<c01874ca>] Not tainted VLI
    EFLAGS: 00210246 (2.6.19-rc1-mm1 #1)
    EIP is at dnotify_flush+0xf/0x73
    eax: c8892c4b ebx: b7f96e4a ecx: cab2c000 edx: b7f96e4a
    esi: 000000ff edi: c148a280 ebp: cab2df70 esp: cab2df64
    ds: 007b es: 007b ss: 0068
    Process java (pid: 13942, ti=cab2c000 task=d572d4d0 task.ti=cab2c000)
    Stack: b7f96e4a 00000000 c148a280 cab2df8c c01563a6 b7f96e4a c148a280 0000020c
    00000001 cef5dec0 cab2dfb4 c01623ed b7f96e4a c148a280 c148a2a4 b7f96e4a
    c148a280 00000007 00000000 fffffff4 cab2c000 c0102e05 00000007 0000020c
    Call Trace:
    [<c01563a6>] filp_close+0x43/0x5e
    [<c01623ed>] sys_dup2+0xdb/0x10f
    [<c0102e05>] sysenter_past_esp+0x56/0x79
    DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x79
    Leftover inexact backtrace:
    =======================
    Code: ff ff 53 e8 d3 00 fe ff 83 c4 0c eb 07 89 f0 e8 6b 40 23 00 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 8b 55 08 57 56 53 8b 42 08 8b 70 30 <0f> b7 46 28 25 00 f0 00 00 3d 00 40 00 00 75 4c 8d 7e 70 89 f8
    EIP: [<c01874ca>] dnotify_flush+0xf/0x73 SS:ESP 0068:cab2df64


    --
    David Kleikamp
    IBM Linux Technology Center

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