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    SubjectRe: [BUG] 2.6.25-rc2-mm1 - Kernel panic while bootup caused by signal_group_exit()
    On Sun, 17 Feb 2008 09:40:33 +0530 Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> wrote:

    > Hi Andrew,
    >
    > The signals-do_signal_stop-use-signal_group_exit.patch is causing the
    > kernel panic, while booting in to the 2.6.25-rc2-mm1 kernel on x86.
    >
    > There has been discussion on the patch for this panic on http://lkml.org/lkml/2008/2/16/99
    >
    > [ 25.512919] BUG: unable to handle kernel paging request at 9d74e37b
    > [ 25.514926] IP: [<c04a8fac>] proc_flush_task+0x5b/0x223
    > [ 25.516934] Oops: 0000 [#1] SMP
    > [ 25.517918] last sysfs file: /sys/block/hdc/removable
    > [ 25.517918] Modules linked in: dm_mirror dm_mod video output sbs sbshc battery ac parport_pc lp parport floppy sg serio_raw ide_cd_mod cdrom scb2_flash mtd chipreg button i2c_piix4 i2c_core pcspkr tg3 mptspi mptscsih mptbase scsi_transport_spi sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
    > [ 25.517918]
    > [ 25.517918] Pid: 1, comm: init Not tainted (2.6.25-rc2-mm1-autotest #1)
    > [ 25.517918] EIP: 0060:[<c04a8fac>] EFLAGS: 00010282 CPU: 2
    > [ 25.517918] EIP is at proc_flush_task+0x5b/0x223
    > [ 25.517918] EAX: 9d74e35b EBX: f7881ef0 ECX: f7a5ed84 EDX: a56b6b6b
    > [ 25.517918] ESI: f74f76f8 EDI: a56b6b6b EBP: f7881f08 ESP: f7881ec0
    > [ 25.517918] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
    > [ 25.517918] Process init (pid: 1, ti=f7881000 task=f788adf0 task.ti=f7881000)
    > [ 25.517918] Stack: f7a5ed84 00000001 f7a5ed58 f7a5ed58 00000000 a56b6b6b f7852750 f7a5ed68
    > [ 25.517918] 35881ef4 00003130 f788b4a4 f788adf0 0012d6c5 00000003 f7881ee3 00000003
    > [ 25.517918] f7a72df0 f7a72df0 f7881f1c c042676d 00000003 000001f5 f7a72df0 f7881f78
    > [ 25.517918] Call Trace:
    > [ 25.517918] [<c042676d>] release_task+0x19/0x2d5
    > [ 25.517918] [<c042701b>] do_wait+0x5f2/0x8fc
    > [ 25.517918] [<c041d9e7>] default_wake_function+0x0/0xd
    > [ 25.517918] [<c042739d>] sys_wait4+0x78/0x8e
    > [ 25.517918] [<c04273c6>] sys_waitpid+0x13/0x15
    > [ 25.517918] [<c04039ba>] sysenter_past_esp+0x5f/0x99
    > [ 25.517918] =======================
    > [ 25.517918] Code: 1c 89 4d d4 89 4d c4 89 55 b8 e9 b5 01 00 00 31 ff 83 7d c4 00 74 06 8b 45 d4 8b 78 1c 8b 55 b8 8b 4d b8 8b 12 89 55 cc 8b 41 04 <8b> 40 20 52 68 33 cd 6f c0 6a 0d 89 45 d0 8d 45 db 50 89 45 f0
    > [ 25.517918] EIP: [<c04a8fac>] proc_flush_task+0x5b/0x223 SS:ESP 0068:f7881ec0
    > [ 25.517939] ---[ end trace d0df919a64605019 ]---
    > [ 25.518925] Kernel panic - not syncing: Attempted to kill init!
    >

    hm, are you sure that signals-do_signal_stop-use-signal_group_exit.patch
    causes this oops?


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