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    SubjectRe: Slab corruption in floppy driver module
    Date
    Dirk Gouders <gouders@et.bocholt.fh-gelsenkirchen.de> writes:

    > Vivek Goyal <vgoyal@redhat.com> writes:
    >
    >> On Tue, Jan 24, 2012 at 06:49:37PM +0530, Suresh Jayaraman wrote:
    >>
    >> [..]
    >>
    >>> [ 33.372026] ffff88041dd9be08 ffffffff8134f517 ffff88041dd9be28
    >>> ffff88041da9bc68
    >>> [ 33.372026] Call Trace:
    >>> [ 33.372026] [<ffffffff81243a15>] blk_put_queue+0x15/0x20
    >>> [ 33.372026] [<ffffffff8124d4ff>] disk_release+0x8f/0xd0
    >>> [ 33.372026] [<ffffffff8134f517>] device_release+0x27/0xa0
    >>> [ 33.372026] [<ffffffff812754fd>] kobject_cleanup+0x6d/0x1b0
    >>> [ 33.372026] [<ffffffff8127564d>] kobject_release+0xd/0x10
    >>> [ 33.372026] [<ffffffff81276b17>] kref_put+0x37/0x70
    >>> [ 33.372026] [<ffffffff81275387>] kobject_put+0x27/0x60
    >>> [ 33.372026] [<ffffffff8124dbf7>] put_disk+0x17/0x20
    >>> [ 33.372026] [<ffffffffa00fa92c>] floppy_init+0x1c1/0x675 [floppy]
    >>> [ 33.372026] [<ffffffffa00fae37>] floppy_module_init+0x57/0x220 [floppy]
    >>> [ 33.372026] [<ffffffff810001d3>] do_one_initcall+0x43/0x180
    >>> [ 33.372026] [<ffffffff810a526d>] sys_init_module+0xcd/0x240
    >>> [ 33.372026] [<ffffffff8148d4c2>] system_call_fastpath+0x16/0x1b
    >>> [ 33.372026] [<00007f86dce3406a>] 0x7f86dce34069
    >>> [ 33.372026] Code: eb cc 48 89 fe 31 c0 48 c7 c7 60 aa 7a 81 e8 26 c4 20 00
    >>> e8 92 c1 20 00 eb 8e 55 48 89 e5 53 48 89 fb 48 83 ec 08 48 85 ff 74 16 <f6> 47
    >>> 3c 01 74 19 48 8d 7b 38 48 c7 c6 40 56 27 81 e8 59 17 00
    >>> [ 33.372026] RIP [<ffffffff81275371>] kobject_put+0x11/0x60
    >>> [ 33.372026] RSP <ffff88041dd9bda8>
    >>> [ 33.372026] CR2: ffff88041d986c9c
    >>> [ 33.372026] ---[ end trace f624c17dc6e4672a ]---
    >>> --- cut-here ---
    >>>
    >>> What seems to be happening is after commit f992ae80, add_disk takes a
    >>> extra reference to the queue which is supposed to be put in disk_release().
    >>> In floppy_init() when there were "no floppy controllers found" the control
    >>> goes to out_flush_work. Note that add_disk() is not being called at all and
    >>> so extra reference not taken. We try to put_disk() and the call sequence is
    >>> put_disk()
    >>> kobject_put()
    >>> kref_put()
    >>> kobject_release()
    >>> kobject_cleanup()
    >>> device_release()
    >>> disk_release()
    >>> blk_put_queue() <-- put without a get
    >>> kobject_put()
    >>>
    >>>
    >>> Reverting f992ae80 makes the oops and the slab corruption messages disappear.
    >>> The "no floppy controllers found" message was found in the dmesg.
    >>
    >> I am wondering if extra queue reference for gendisk should be taken by driver
    >> and not by add_disk(). Why? Because disk->queue association is setup by
    >> driver and not by add_disk(). That way even if we don't call, add_disk(),
    >> we should be fine.
    >
    > I also noticed this problem about two weeks ago
    > (https://lkml.org/lkml/2012/1/10/177) -- the mentioned commit 523e1d399c
    > seems to be identical to f992ae80.
    >
    > Perhaps, it is helpful to notice that I also played with this on a
    > machine that _has_ a floppy controler and if the floppy driver is loaded
    > as a module on boot, then unloaded and reloaded it also outputs error
    > messages, i.e. re-loading the module also causes problems.

    For completeness, here are the messages produced by a module re-load.

    Dirk

    =============================================================================
    BUG blkdev_queue (Tainted: P O): Poison overwritten
    -----------------------------------------------------------------------------

    INFO: 0xffff880075d99498-0xffff880075d99498. First byte 0x6a instead of 0x6b
    INFO: Allocated in blk_alloc_queue_node+0x1e/0x1a2 age=39161720 cpu=1 pid=1671
    set_track+0x5e/0xd9
    alloc_debug_processing+0xbd/0x15e
    __slab_alloc+0x324/0x376
    blk_alloc_queue_node+0x1e/0x1a2
    prio_tree_insert+0x187/0x239
    blk_alloc_queue_node+0x1e/0x1a2
    kmem_cache_alloc_node+0x6b/0x132
    blk_alloc_queue_node+0x1e/0x1a2
    0xffffffffa001b25f
    blk_init_queue_node+0x1a/0x52
    alloc_disk_node+0xba/0xdd
    floppy_module_init+0x215/0xdc0 [floppy]
    tracepoint_module_notify+0xcd/0x15d
    notifier_call_chain+0x2e/0x5b
    floppy_module_init+0x0/0xdc0 [floppy]
    do_one_initcall+0x78/0x12b
    INFO: Freed in kobject_release+0x48/0x5e age=3353 cpu=0 pid=24844
    set_track+0x5e/0xd9
    free_debug_processing+0x155/0x1ed
    __slab_free+0x2b/0x291
    prio_tree_remove+0xc0/0xd4
    kobject_release+0x48/0x5e
    kobject_release+0x48/0x5e
    kmem_cache_free+0x9b/0xd9
    kobject_release+0x48/0x5e
    0xffffffffa001d1de
    sys_delete_module+0x1cf/0x22c
    do_munmap+0x2cc/0x2e5
    system_call_fastpath+0x16/0x1b
    INFO: Slab 0xffffea0001d76600 objects=15 used=15 fp=0x (null) flags=0x100000000004080
    INFO: Object 0xffff880075d99070 @offset=4208 fp=0xffff880075d9ead8

    Bytes b4 ffff880075d99060: b7 69 54 02 01 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a .iT.....ZZZZZZZZ
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    Pid: 24851, comm: modprobe Tainted: P O 3.2.0-07682-g211e53b #27
    Call Trace:
    [<ffffffff810fcd49>] ? check_bytes_and_report+0xad/0xe6
    [<ffffffff810fce3d>] ? check_object+0xbb/0x1f7
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffff810fe340>] ? alloc_debug_processing+0xa3/0x15e
    [<ffffffff810ff4aa>] ? __slab_alloc+0x324/0x376
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffff812cccea>] ? prio_tree_insert+0x187/0x239
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffff810ff85b>] ? kmem_cache_alloc_node+0x6b/0x132
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffffa0c4f25f>] ? lock_fdc.clone.8+0xfd/0xfd [floppy]
    [<ffffffff812bb3ab>] ? blk_init_queue_node+0x1a/0x52
    [<ffffffff812c1a07>] ? alloc_disk_node+0xba/0xdd
    [<ffffffffa0026341>] ? floppy_module_init+0x215/0xdc0 [floppy]
    [<ffffffff810ad669>] ? tracepoint_module_notify+0xcd/0x15d
    [<ffffffff8154e9d7>] ? notifier_call_chain+0x2e/0x5b
    [<ffffffffa002612c>] ? daring+0x67/0x67 [floppy]
    [<ffffffff810002e5>] ? do_one_initcall+0x78/0x12b
    [<ffffffff8109228e>] ? sys_init_module+0x15e0/0x17c3
    [<ffffffff81551d62>] ? system_call_fastpath+0x16/0x1b
    FIX blkdev_queue: Restoring 0xffff880075d99498-0xffff880075d99498=0x6b

    FIX blkdev_queue: Marking all objects used
    =============================================================================
    BUG blkdev_queue (Tainted: P O): Poison overwritten
    -----------------------------------------------------------------------------

    INFO: 0xffff8800795b3db0-0xffff8800795b3db0. First byte 0x6a instead of 0x6b
    INFO: Allocated in blk_alloc_queue_node+0x1e/0x1a2 age=39161721 cpu=1 pid=1671
    set_track+0x5e/0xd9
    alloc_debug_processing+0xbd/0x15e
    __slab_alloc+0x324/0x376
    blk_alloc_queue_node+0x1e/0x1a2
    prio_tree_insert+0x143/0x239
    blk_alloc_queue_node+0x1e/0x1a2
    kmem_cache_alloc_node+0x6b/0x132
    blk_alloc_queue_node+0x1e/0x1a2
    0xffffffffa001b25f
    blk_init_queue_node+0x1a/0x52
    alloc_disk_node+0xba/0xdd
    floppy_module_init+0x215/0xdc0 [floppy]
    tracepoint_module_notify+0xcd/0x15d
    notifier_call_chain+0x2e/0x5b
    floppy_module_init+0x0/0xdc0 [floppy]
    do_one_initcall+0x78/0x12b
    INFO: Freed in kobject_release+0x48/0x5e age=3353 cpu=0 pid=24844
    set_track+0x5e/0xd9
    free_debug_processing+0x155/0x1ed
    __slab_free+0x2b/0x291
    prio_tree_remove+0xc0/0xd4
    kobject_release+0x48/0x5e
    kobject_release+0x48/0x5e
    kmem_cache_free+0x9b/0xd9
    kobject_release+0x48/0x5e
    0xffffffffa001d1de
    sys_delete_module+0x1cf/0x22c
    do_munmap+0x2cc/0x2e5
    system_call_fastpath+0x16/0x1b
    INFO: Slab 0xffffea0001e56c00 objects=15 used=15 fp=0x (null) flags=0x100000000004080
    INFO: Object 0xffff8800795b3988 @offset=14728 fp=0xffff8800795b41c0

    Bytes b4 ffff8800795b3978: b7 69 54 02 01 00 00 00 5a 5a 5a 5a 5a 5a 5a 5a .iT.....ZZZZZZZZ
    Object ffff8800795b3988: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3998: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b39a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b39b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b39c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b39d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b39e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b39f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3a98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3aa8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ab8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ac8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ad8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ae8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3af8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3b98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ba8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3bb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3bc8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3bd8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3be8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3bf8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3c98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ca8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3cb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3cc8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3cd8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ce8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3cf8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3d98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3da8: 6b 6b 6b 6b 6b 6b 6b 6b 6a 6b 6b 6b 6b 6b 6b 6b kkkkkkkkjkkkkkkk
    Object ffff8800795b3db8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3dc8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3dd8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3de8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3df8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3e98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ea8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3eb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ec8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ed8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ee8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ef8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f08: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f18: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f38: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f48: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f58: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f68: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f88: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3f98: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3fa8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3fb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3fc8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3fd8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3fe8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b3ff8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4008: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4018: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4028: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4038: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4048: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4058: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    Object ffff8800795b4068: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
    Redzone ffff8800795b4078: bb bb bb bb bb bb bb bb ........
    Padding ffff8800795b41b8: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ
    Pid: 24851, comm: modprobe Tainted: P O 3.2.0-07682-g211e53b #27
    Call Trace:
    [<ffffffff810fcd49>] ? check_bytes_and_report+0xad/0xe6
    [<ffffffff810fce3d>] ? check_object+0xbb/0x1f7
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffff810fe340>] ? alloc_debug_processing+0xa3/0x15e
    [<ffffffff810ff4aa>] ? __slab_alloc+0x324/0x376
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffff812cccea>] ? prio_tree_insert+0x187/0x239
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffff810ff85b>] ? kmem_cache_alloc_node+0x6b/0x132
    [<ffffffff812ba29b>] ? blk_alloc_queue_node+0x1e/0x1a2
    [<ffffffffa0c4f25f>] ? lock_fdc.clone.8+0xfd/0xfd [floppy]
    [<ffffffff812bb3ab>] ? blk_init_queue_node+0x1a/0x52
    [<ffffffff812c1a07>] ? alloc_disk_node+0xba/0xdd
    [<ffffffffa0026341>] ? floppy_module_init+0x215/0xdc0 [floppy]
    [<ffffffff810ad669>] ? tracepoint_module_notify+0xcd/0x15d
    [<ffffffff8154e9d7>] ? notifier_call_chain+0x2e/0x5b
    [<ffffffffa002612c>] ? daring+0x67/0x67 [floppy]
    [<ffffffff810002e5>] ? do_one_initcall+0x78/0x12b
    [<ffffffff8109228e>] ? sys_init_module+0x15e0/0x17c3
    [<ffffffff81551d62>] ? system_call_fastpath+0x16/0x1b
    FIX blkdev_queue: Restoring 0xffff8800795b3db0-0xffff8800795b3db0=0x6b

    FIX blkdev_queue: Marking all objects used
    Floppy drive(s): fd0 is 1.44M
    FDC 0 is a post-1991 82077


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      Last update: 2012-01-25 10:09    [W:0.054 / U:29.784 seconds]
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