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    SubjectRe: [ata crash] Re: Linux 2.6.25-rc1
    On Tue, 12 Feb 2008 09:18:16 +0100
    Ingo Molnar <mingo@elte.hu> wrote:

    >
    > hm, ata_port_wait_eh() started crashing on a testsystem (8-way box):
    >
    > [ 39.324116] Calling initcall 0xc09f41eb: legacy_init+0x0/0x888()
    > [ 39.331868] BUG: unable to handle kernel NULL pointer dereference
    > at 000000e4 [ 39.338811] IP: [<c04a4e11>] ata_port_wait_eh+0x77/0xa2
    > [ 39.344115] *pde = 00000000
    > [ 39.347778] Oops: 0000 [#1] SMP
    > [ 39.350769]
    > [ 39.350769] Pid: 1, comm: swapper Not tainted (2.6.25-rc1 #5)
    > [ 39.350769] EIP: 0060:[<c04a4e11>] EFLAGS: 00010246 CPU: 1
    > [ 39.350769] EIP is at ata_port_wait_eh+0x77/0xa2
    > [ 39.350769] EAX: f72e5d9c EBX: f7340000 ECX: c035eb18 EDX: 00000000
    > [ 39.350769] ESI: f73424f0 EDI: 00000246 EBP: f7c63efc ESP: f7c63edc
    > [ 39.350769] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
    > [ 39.350769] Process swapper (pid: 1, ti=f7c62000 task=f7c60000
    > task.ti=f7c62) [ 39.350769] Stack: 00000000 f7c60000 c012fd31
    > f7c63ee8 f7c63ee8 f7340000 f73 [ 39.350769] f7c63f18
    > c049c4b1 f72e5d9c 00000000 f7340000 00810001 000
    > [ 39.350769] c09f4a60 00000000 00000000 c0b79a9c 00000001
    > 00000001 000 [ 39.350769] Call Trace: [ 39.350769]
    > [<c012fd31>] ? autoremove_wake_function+0x0/0x30 [ 39.350769]
    > [<c049c4b1>] ? ata_host_detach+0x4c/0x13b [ 39.350769]
    > [<c09f4a60>] ? legacy_init+0x875/0x888 [ 39.350769] [<c0133fa6>] ?
    > getnstimeofday+0x35/0xc0 [ 39.350769] [<c09d7465>] ?
    > kernel_init+0x12a/0x277 [ 39.350769] [<c09d7300>] ?
    > do_early_param+0x34/0x6f [ 39.350769] [<c09d733b>] ?
    > kernel_init+0x0/0x277 [ 39.350769] [<c0104b17>] ?
    > kernel_thread_helper+0x7/0x10 [ 39.350769] =======================
    > [ 39.350769] Code: e8 82 0f 21 00 8b 43 08 e8 28 2c 21 00 89 c7 f6
    > 43 10 03 8 [ 39.350769] EIP: [<c04a4e11>]
    > ata_port_wait_eh+0x77/0xa2 SS:ESP 0068:f7c63edc[ 39.350793]
    > ---[ end trace 07a6e399b623c9d0 ]--- [ 39.354119] Kernel panic -
    > not syncing: Attempted to kill init!
    >
    > no particular commit stands out at me - so i Cc:-ed various PATA
    > folks. Config attached [it's randconfig generated so might have weird
    > option combinations in it]. [ Note: the box uses BLK_CPQ_DA as its
    > primary storage, ATA is just a CDROM side-thing - so it was never
    > heavily tested here. It never crashed the bootup before though. ]
    >
    > On a second attempt to boot the same bzImage, another ATA related
    > weirdness showed up:
    >
    > [ 8.226144] Calling initcall 0xc09f3d8e: isapnp_init+0x0/0xf()
    > [ 8.232017] Bad IO access at port 0x0 (outb(val,port))
    > [ 8.232799] ------------[ cut here ]------------
    > [ 8.232799] WARNING: at lib/iomap.c:44 bad_io_access+0x2f/0x34()
    > [ 8.232799] Pid: 1, comm: swapper Not tainted 2.6.25-rc1 #5
    > [ 8.232799] [<c011fd63>] warn_on_slowpath+0x3c/0x4c
    > [ 8.232799] [<c0358e9d>] ? serial8250_console_write+0x0/0x14e
    > [ 8.232799] [<c01200a5>] ? __call_console_drivers+0x56/0x63
    > [ 8.232799] [<c06b7acf>] ? _spin_unlock_irqrestore+0x15/0x21
    > [ 8.232799] [<c0120556>] ? release_console_sem+0x1c1/0x1c9
    > [ 8.232799] [<c015c400>] ? print_trailer+0x6e/0xfc
    > [ 8.232799] [<c015c77f>] ? check_object+0x10b/0x181
    > [ 8.232799] [<c01209a0>] ? printk+0x15/0x17
    > [ 8.232799] [<c02cc2ce>] bad_io_access+0x2f/0x34
    > [ 8.232799] [<c02cc48a>] iowrite8+0x31/0x34
    > [ 8.232799] [<c04a1c8d>] ata_bmdma_freeze+0x1d/0x30

    btw this one was featured in the weekly bug top 10.. it's a rather popular thing to happen.


    --
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