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    SubjectRe: Patch for /proc/mounts problems on 2.2.x
    Christian Czezatke wrote:
    > Unfortunately, I had to discover that /proc/mounts does not show all the
    > mounting options (usrquota, grpquota).

    These options are ignored. linux/fs/ext2/super.c from 2.2.18-pre17:

    /* Silently ignore the quota options */
    else if (!strcmp (this_char, "grpquota")
    || !strcmp (this_char, "noquota")
    || !strcmp (this_char, "quota")
    || !strcmp (this_char, "usrquota"))
    /* Don't do anything ;-) */ ;
    else {
    printk ("EXT2-fs: Unrecognized mount option %s\n",
    this_char);
    return 0;
    }


    > -- Furthermore, the max. size of
    > /proc/mounts is limited to one page. Even worse, the current
    > implementation in Linux 2.2.17 and 2.2.18preX does not perform proper
    > bounds checking. (I've successfully triggered off an OOPS by exploiting
    > this on a box running Linux 2.2.17).

    Don't mount so many filesystems, or don't use so many no-op options :)

    --
    Jeff Garzik | The difference between laziness and
    Building 1024 | prioritization is the end result.
    MandrakeSoft |
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