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    SubjectRe: [OOPS] on 2.6.20-rc5-rt10
    Date
    Am Dienstag, 30. Januar 2007 15:30 schrieb Remy Bohmer:
    > Hello All,
    >
    > Once in a while we see the following stacktrace.
    > We do not know yet the exact condition that generates this, but is
    > there anyone that recognises this oops?
    >
    > Kind Regards,
    >
    > Remy Bohmer
    >
    >
    > Jan 30 14:09:20 localhost kernel: BUG: unable to handle kernel paging
    > request at virtual address 2e3277e5
    > Jan 30 14:09:20 localhost kernel: printing eip:
    > Jan 30 14:09:20 localhost kernel: c0140214
    > Jan 30 14:09:20 localhost kernel: *pde = 00000000
    > Jan 30 14:09:20 localhost kernel: stopped custom tracer.
    > Jan 30 14:09:20 localhost kernel: Oops: 0002 [#1]
    > Jan 30 14:09:20 localhost kernel: PREEMPT SMP
    > Jan 30 14:09:20 localhost kernel: Modules linked in: cap_over
    > commoncap i2c_dev uhci_hcd i2c_i801 i2c_core ehci_hcd
    > Jan 30 14:09:20 localhost kernel: CPU: 0
    > Jan 30 14:09:20 localhost kernel: EIP: 0060:[<c0140214>] Not tainted VLI
    > Jan 30 14:09:20 localhost kernel: EFLAGS: 00010246 (2.6.20-rc5-rt10 #1)
    > Jan 30 14:09:20 localhost kernel: EIP is at module_put+0x24/0x60
    > Jan 30 14:09:20 localhost kernel: eax: 2e3277e5 ebx: f774da00 ecx:
    > c1df40a0 edx: 2e327665
    > Jan 30 14:09:20 localhost kernel: esi: f6e93af0 edi: 2e327665 ebp:
    > f4a1bf40 esp: f4a1bf40
    > Jan 30 14:09:20 localhost kernel: ds: 007b es: 007b ss: 0068
    > preempt: 00000002
    > Jan 30 14:09:20 localhost kernel: Process udevd (pid: 11594,
    > ti=f4a1a000 task=f6014710 task.ti=f4a1a000)
    > Jan 30 14:09:20 localhost kernel: Stack: f4a1bf54 c01a360e 00000010
    > f5882ac0 f7e3f9c4 f4a1bf78 c01684f1 00000000
    > Jan 30 14:09:20 localhost kernel: 00000000 f43d5c14 f7dc3c40
    > f5882ac0 c1f60680 00000000 f4a1bf80 c0168629
    > Jan 30 14:09:20 localhost kernel: f4a1bf98 c01656f7 f4a1bfb0
    > c1f60680 c1f60700 00000003 f4a1bfb0 c01669d9
    > Jan 30 14:09:20 localhost kernel: Call Trace:
    > Jan 30 14:09:20 localhost kernel: [<c01054ca>] show_trace_log_lvl+0x1a/0x30
    > Jan 30 14:09:20 localhost kernel: [<c010559b>] show_stack_log_lvl+0xbb/0x100
    > Jan 30 14:09:20 localhost kernel: [<c01057c0>] show_registers+0x1e0/0x300
    > Jan 30 14:09:20 localhost kernel: [<c0105a05>] die+0x125/0x250
    > Jan 30 14:09:20 localhost kernel: [<c0115b75>] do_page_fault+0x145/0x610
    > Jan 30 14:09:20 localhost kernel: [<c03ee69c>] error_code+0x7c/0x84
    > Jan 30 14:09:20 localhost kernel: [<c01a360e>] sysfs_release+0x3e/0x70
    > Jan 30 14:09:20 localhost kernel: [<c01684f1>] __fput+0xa1/0x170
    > Jan 30 14:09:20 localhost kernel: [<c0168629>] fput+0x19/0x20
    > Jan 30 14:09:20 localhost kernel: [<c01656f7>] filp_close+0x47/0x70
    > Jan 30 14:09:20 localhost kernel: [<c01669d9>] sys_close+0x69/0xc0
    > Jan 30 14:09:20 localhost kernel: [<c0104472>] sysenter_past_esp+0x5f/0x85
    > Jan 30 14:09:20 localhost kernel: =======================
    > Jan 30 14:09:20 localhost kernel: Code: 00 8d bf 00 00 00 00 55 85 c0
    > 89 e5 89 c2 74 34 89 e0 25 00 e0 ff ff 83 40 14 01 65 a1 04 00 00 00
    > c1 e0 07 8d 84 10 80 01 00 00 <ff> 08 83 3a 02 74 1b 89 e0 25 00 e0 ff
    > ff 83 68 14 01 8b 40 08
    > Jan 30 14:09:20 localhost kernel: EIP: [<c0140214>]
    > module_put+0x24/0x60 SS:ESP 0068:f4a1bf40

    I think I saw similar oopses.
    Cause was a driver having freed some kmalloced struct _before_
    sysfs_release had given its ok.
    Happened on physical device removal or rmmod here.

    Karsten
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