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    SubjectRe: "do_IRQ: 0.89 No irq handler for vector (irq -1)"
    On Thu, 7 Oct 2010, Thomas Gleixner wrote:
    > On Thu, 7 Oct 2010, Dave Airlie wrote:
    > Oct 7 22:24:19 ionos kernel: Console: switching to colour VGA+ 80x25
    > Oct 7 22:24:22 ionos kernel: drm: unregistered panic notifier
    > Oct 7 22:24:22 ionos kernel: vga_switcheroo: disabled
    > Oct 7 22:24:22 ionos kernel: BUG: sleeping function called from invalid context at /home/tglx/work/kernel/git/linux-2.6/arch/x86/mm/fault.c:1074
    > Oct 7 22:24:22 ionos kernel: in_atomic(): 0, irqs_disabled(): 1, pid: 2681, name: udevd
    > Oct 7 22:24:22 ionos kernel: Pid: 2681, comm: udevd Not tainted 2.6.36-rc7 #4
    > Oct 7 22:24:22 ionos kernel: Call Trace:
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8103d3d1>] __might_sleep+0xed/0xef
    > Oct 7 22:24:22 ionos kernel: [<ffffffff81452d81>] do_page_fault+0x1b2/0x2bb
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8144ff55>] page_fault+0x25/0x30
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8106af14>] ? lock_hrtimer_base+0x22/0x50
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8106af5e>] hrtimer_get_remaining+0x1c/0x46
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8105119d>] itimer_get_remtime+0x16/0x3c
    >
    > That means that the hrtimer in the shared signal handler is corrupted. Uurg.
    >
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8106d127>] ? abort_creds+0x1a/0x1c
    > Oct 7 22:24:22 ionos kernel: [<ffffffff81051445>] do_setitimer+0x97/0x1e7
    > Oct 7 22:24:22 ionos kernel: [<ffffffff81051674>] alarm_setitimer+0x3a/0x60
    > Oct 7 22:24:22 ionos kernel: [<ffffffff8105a248>] sys_alarm+0xe/0x12
    > Oct 7 22:24:22 ionos kernel: [<ffffffff81009c72>] system_call_fastpath+0x16/0x1b
    > Oct 7 22:24:22 ionos kernel: BUG: unable to handle kernel paging request at 00000000934a2400
    >
    > Something is fishy here. That's not a kernel address

    I tried the patch you pointed me to on IRC:

    http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commit;h=dab8dcfa3c8e3b021a138bee7c17791b4991ba55

    The first test worked fine. But after I added some debugging I got
    another weird corruption this time on the first unload:

    Oct 7 23:21:24 ionos kernel: Console: switching to colour VGA+ 80x25
    Oct 7 23:21:31 ionos kernel: drm: unregistered panic notifier
    Oct 7 23:21:31 ionos kernel: vga_switcheroo: disabled
    Oct 7 23:21:31 ionos kernel: [drm:drm_mm_takedown] *ERROR* Memory manager not clean. Delaying takedown

    That one scares me :)

    Oct 7 23:21:31 ionos kernel: [drm] Module unloaded
    Oct 7 23:21:32 ionos kernel: BUG: sleeping function called from invalid context at /home/tglx/work/kernel/git/linux-2.6/arch/x86/mm/fault.c:1074
    Oct 7 23:21:32 ionos kernel: in_atomic(): 0, irqs_disabled(): 1, pid: 1243, name: dbus-daemon
    Oct 7 23:21:32 ionos kernel: Pid: 1243, comm: dbus-daemon Not tainted 2.6.36-rc7+ #6
    Oct 7 23:21:32 ionos kernel: Call Trace:
    Oct 7 23:21:32 ionos kernel: [<ffffffff8103d3d1>] __might_sleep+0xed/0xef
    Oct 7 23:21:32 ionos kernel: [<ffffffff81452d81>] do_page_fault+0x1b2/0x2bb
    Oct 7 23:21:32 ionos kernel: [<ffffffff8144ff55>] page_fault+0x25/0x30
    Oct 7 23:21:32 ionos kernel: [<ffffffff813988bd>] ? sock_alloc_send_pskb+0xd6/0x2eb
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110044d>] ? __kmalloc_node_track_caller+0x149/0x154
    Oct 7 23:21:32 ionos kernel: [<ffffffff813988bd>] ? sock_alloc_send_pskb+0xd6/0x2eb
    Oct 7 23:21:32 ionos kernel: [<ffffffff8139cc02>] __alloc_skb+0x83/0x141
    Oct 7 23:21:32 ionos kernel: [<ffffffff813988bd>] sock_alloc_send_pskb+0xd6/0x2eb
    Oct 7 23:21:32 ionos kernel: [<ffffffff81039551>] ? __wake_up_common+0x4e/0x84
    Oct 7 23:21:32 ionos kernel: [<ffffffff81399130>] ? cred_to_ucred+0x6d/0x79
    Oct 7 23:21:32 ionos kernel: [<ffffffff81398ae7>] sock_alloc_send_skb+0x15/0x17
    Oct 7 23:21:32 ionos kernel: [<ffffffff81425818>] unix_stream_sendmsg+0x11c/0x2c3
    Oct 7 23:21:32 ionos kernel: [<ffffffff81394921>] __sock_sendmsg+0x6b/0x77
    Oct 7 23:21:32 ionos kernel: [<ffffffff81396cc3>] ? sock_aio_write+0x0/0xd4
    Oct 7 23:21:32 ionos kernel: [<ffffffff81396d83>] sock_aio_write+0xc0/0xd4
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110be39>] do_sync_readv_writev+0xc1/0x100
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110bba3>] ? might_fault+0x21/0x23
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110bbd4>] ? copy_from_user+0x2f/0x31
    Oct 7 23:21:32 ionos kernel: [<ffffffff811d0379>] ? security_file_permission+0x2e/0x33
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110cb2e>] do_readv_writev+0xa7/0x129
    Oct 7 23:21:32 ionos kernel: [<ffffffff8111bcfc>] ? d_kill+0x3e/0x46
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110d7f6>] ? fput+0x214/0x223
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110cbf3>] vfs_writev+0x43/0x4e
    Oct 7 23:21:32 ionos kernel: [<ffffffff8110cce3>] sys_writev+0x4a/0x93
    Oct 7 23:21:32 ionos kernel: [<ffffffff81009c72>] system_call_fastpath+0x16/0x1b
    Oct 7 23:21:32 ionos kernel: BUG: unable to handle kernel paging request at 00000037362e313a

    We are again dereferencing a user space address.

    Thanks,

    tglx


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