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    SubjectRe: BUG kmalloc-4096: Poison overwritten
    On 06/05/2010 11:27 PM, Jiri Slaby wrote:
    > On 06/06/2010 08:12 AM, Justin P. Mattock wrote:
    >> =============================================================================
    >>
    >> [ 0.002046] BUG kmalloc-4096: Poison overwritten
    >> [ 0.002051]
    >> -----------------------------------------------------------------------------
    >>
    >> [ 0.002052]
    >> [ 0.002063] INFO: 0xffff88003ec09e00-0xffff88003ec09e9f. First byte
    >> 0x20 instead of 0x6b
    >> [ 0.002073] INFO: Slab 0xffffea0000dba1c0 objects=7 used=1
    >> fp=0xffff88003ec09048 flags=0x40000000000040c3
    >> [ 0.002082] INFO: Object 0xffff88003ec09048 @offset=4168
    >> fp=0xffff88003ec0a090
    >> [ 0.002083]
    >> [ 0.002093] Bytes b4 0xffff88003ec09038: 00 00 00 00 00 00 00 00 5a
    >> 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
    >> [ 0.002114] Object 0xffff88003ec09048: 6b 6b 6b 6b 6b 6b 6b 6b 6b
    >> 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    > ...
    >> 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
    >> [ 0.002999] Object 0xffff88003ec09df8: 6b 6b 6b 6b 6b 6b 6b 6b 20
    >> 07 20 07 20 07 20 07 kkkkkkkk........
    >> [ 0.002999] Object 0xffff88003ec09e08: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e18: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e28: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e38: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e48: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e58: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e68: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e78: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e88: 20 07 20 07 20 07 20 07 20
    >> 07 20 07 20 07 20 07 ................
    >> [ 0.002999] Object 0xffff88003ec09e98: 20 07 20 07 20 07 20 07 6b
    >> 6b 6b 6b 6b 6b 6b 6b ........kkkkkkkk
    >> [ 0.002999] Object 0xffff88003ec09ea8: 6b 6b 6b 6b 6b 6b 6b 6b 6b
    >
    > Just guessing, grey spaces which should go to video ram?
    >


    o.k. I bisected this down to this commit:
    962400e8fd29
    reverting gets dmesg to not
    have a Poison overwritten..

    as for the screen blankness I think this
    did cause it..keep in mind the blankness(black)
    is not everytime(every so often)
    here's some images of it:
    http://www.flickr.com/photos/44066293@N08/4676350524/
    http://www.flickr.com/photos/44066293@N08/4676350016/
    (and some other images of frisco for your enjoyment!!)



    Justin P. Mattock


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