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    Subjectptrace + ioctl( LOOP_SET_FD ) brokeness.
    The following hangs reliably on 2.4.22 (test on x86 and x86_64):

    strace mount -o loop somefile /mnt

    the mount program ends up wedged in the D state. The last file lines
    of the strace look like this:

    open("/dev/loop0", O_RDONLY|O_LARGEFILE) = 3
    ioctl(3, 0x4c03, 0xbfffded0) = -1 ENXIO (No such device or address)
    close(3) = 0
    open("xxx", O_RDWR|O_LARGEFILE) = 3
    open("/dev/loop0", O_RDWR|O_LARGEFILE) = 4
    mlockall(MCL_CURRENT|MCL_FUTURE) = 0
    ioctl(4, 0x4c00


    - Erik
    -
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