lkml.org 
[lkml]   [2018]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: BUG: Mount ignores mount options
    From
    Date
    On 2018/08/10 23:05, Eric W. Biederman wrote:
    >
    > There is a serious problem with mount options today that fsopen does not
    > address. The problem is that mount options are ignored for block based
    > filesystems, and any other type of filesystem that follows the same
    > pattern.
    >
    > The script below demonstrates this bug. Showing this bug can cause the
    > ext4 "acl" "quota" and "user_xattr" options to be silently ignored.
    >
    > fsopen has my nack until it addresses this issue.
    >
    > I don't know if we can fix this in the context of sys_mount. But we if
    > we are redoing the option parsing of how we mount filesystems this needs
    > to be fixed before we start worrying about bug compatibility.
    >
    > Hopefully this report is simple and clear enough that we can at least
    > agree on the problem.
    >
    > Eric

    This might be related to a problem that syzbot is failing to reproduce a problem.

    https://groups.google.com/forum/#!msg/syzkaller-bugs/R03vI7RCVco/0PijCTrcCgAJ

    syzbot found a reproducer, and the reproducer was working until next-20180803.
    But the reproducer is failing to reproduce this problem in next-20180806 despite
    there is no mm related change between next-20180803 and next-20180806.

    Therefore, I suspect that the reproducer is no longer working as intended. And
    there was parser change (David Howells' patch) between next-20180803 and next-20180806.

    I'm waiting for response from David Howells...

    \
     
     \ /
      Last update: 2018-08-10 17:14    [W:6.367 / U:0.068 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site