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    Subject2.6.9-rc1-mm5: Oops related to reiserfs, other stuff
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    Andrew,

    There is a problem in 2.6.9-rc1-mm5 related to the reiserfs handling of ACLs.
    Namely, if a reiserfs partition is mounted with "-o acl", any attempt to
    create a file on it results in an Oops similar to this one:

    Unable to handle kernel paging request at fffffffffffffff3 RIP:
    <ffffffff8020f9f4>{reiserfs_cache_default_acl+164}
    PML4 103027 PGD 170a067 PMD 0
    Oops: 0002 [1]
    CPU 0
    Modules linked in: usbserial parport_pc lp parport joydev sg sd_mod sr_mod
    scsi_mod cpufreq_userspace powernow_k8 thermal processor fan snd_d
    Pid: 18656, comm: kdm Not tainted 2.6.9-rc1-mm5
    RIP: 0010:[<ffffffff8020f9f4>]
    <ffffffff8020f9f4>{reiserfs_cache_default_acl+164}
    RSP: 0018:00000100143b3db8 EFLAGS: 00010286
    RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000002
    RDX: 000001001bf3cc68 RSI: ffffffff804272c0 RDI: 000001001bf3cc30
    RBP: 000001001bf3cc78 R08: 0000000000000000 R09: 0000000000000000
    R10: 0000000000000006 R11: ffffffff803c6d32 R12: fffffffffffffff3
    R13: 0000000000008180 R14: 0000010019a5b868 R15: 000000000000000a
    FS: 0000002a95ec24c0(0000) GS:ffffffff80551b40(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    CR2: fffffffffffffff3 CR3: 0000000000101000 CR4: 00000000000006e0
    Process kdm (pid: 18656, threadinfo 00000100143b2000, task 000001000b512a10)
    Stack: 000001001bf3c120 000001001bf3cc78 0000000000008180 ffffffff801e99c6
    0000000000000000 0000010019a5b868 0000000000000000 0000000000000000
    0000000000000000 0000000000000000
    Call Trace:<ffffffff801e99c6>{reiserfs_create+102}
    <ffffffff801a39ad>{vfs_create+237}
    <ffffffff801a6480>{open_namei+432} <ffffffff8018ddd7>{filp_open+39}
    <ffffffff8018da94>{get_unused_fd+180} <ffffffff8018de4c>{sys_open+76}
    <ffffffff80110c02>{system_call+126}

    Code: 41 ff 0c 24 0f 94 c0 84 c0 74 08 4c 89 e7 e8 19 00 f6 ff 89
    RIP <ffffffff8020f9f4>{reiserfs_cache_default_acl+164} RSP <00000100143b3db8>
    CR2: fffffffffffffff3

    This happens 100% of the time, and the workaround is not to mount reiserfs
    with "-o acl", of course.

    Also, in the output of dmesg I've got the following line:

    udev[10682]: segfault at 0000000000000138 rip 0000000000405818 rsp
    0000007fbffff470 error 4

    (this does not seem to be reproducible, however) and the following error
    message from the USB subsystem:

    usb usb2: string descriptor 0 read error: -113

    (repeated 8 times, occurs always at startup).

    The kernel is booted with the following command line: root=/dev/hdc6 vga=792
    resume=/dev/hdc3 pci=routeirq nmi_watchdog=0 console=ttyS0,57600

    The .config is available at:
    http://www.sisk.pl/kernel/040913/2.6.9-rc1-mm5.config

    The full output of dmesg is available at:
    http://www.sisk.pl/kernel/040913/2.6.9-rc1-mm5-dmesg.log

    Greets,
    RJW

    --
    - Would you tell me, please, which way I ought to go from here?
    - That depends a good deal on where you want to get to.
    -- Lewis Carroll "Alice's Adventures in Wonderland"
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