• Eric W. Biederman's avatar
    proc: Remove the now unnecessary internal mount of proc · 69879c01
    Eric W. Biederman authored
    There remains no more code in the kernel using pids_ns->proc_mnt,
    therefore remove it from the kernel.
    
    The big benefit of this change is that one of the most error prone and
    tricky parts of the pid namespace implementation, maintaining kernel
    mounts of proc is removed.
    
    In addition removing the unnecessary complexity of the kernel mount
    fixes a regression that caused the proc mount options to be ignored.
    Now that the initial mount of proc comes from userspace, those mount
    options are again honored.  This fixes Android's usage of the proc
    hidepid option.
    Reported-by: default avatarAlistair Strachan <astrachan@google.com>
    Fixes: e94591d0 ("proc: Convert proc_mount to use mount_ns.")
    Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
    69879c01
pid.c 15.7 KB