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    SubjectRe: [BUG] 2.6.25-rc2-mm1 - Kernel panic while bootup caused by signal_group_exit()
    On 02/20, Rik van Riel wrote:
    >
    > On Sun, 17 Feb 2008 09:40:33 +0530
    > Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> wrote:
    >
    > > [ 25.512919] BUG: unable to handle kernel paging request at 9d74e37b
    > > [ 25.514926] IP: [<c04a8fac>] proc_flush_task+0x5b/0x223
    >
    > I wonder if this one is related. Also with 2.6.25-rc2-mm1 on x86_64:
    >
    > BUG: unable to handle kernel paging request at 0000000000200200
    > IP: [<ffffffff81043d3c>] free_pid+0x35/0x90
    > ...
    > Call Trace:
    > [<ffffffff81035a6d>] ? release_task+0x1be/0x346
    > [<ffffffff810362b7>] ? do_wait+0x6c2/0xa0e
    > [<ffffffff81051316>] ? trace_hardirqs_on_caller+0xf2/0x115
    > [<ffffffff8102ac72>] ? default_wake_function+0x0/0xe
    > [<ffffffff81051316>] ? trace_hardirqs_on_caller+0xf2/0x115
    > [<ffffffff8103668d>] ? sys_wait4+0x8a/0xa1
    > [<ffffffff8100be3b>] ? system_call_after_swapgs+0x7b/0x80

    Yes, please look at http://marc.info/?t=120309840500006

    Btw. The bug in tty_io.c _can_ explain this trace, but it would be nice
    to ensure we don't have other problems. Could you try this

    http://marc.info/?l=linux-kernel&m=120352655031911

    patch?

    (I can't understand why this happens at the boot time, and it is not
    reproducable on my side).

    Oleg.



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