lkml.org 
[lkml]   [2012]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH] prctl: Use CAP_SYS_RESOUCE for PR_SET_MM option
    CAP_SYS_ADMIN is already overloaded left and right,
    so to have more finegrained access control use
    CAP_SYS_RESOUCE here.

    The CAP_SYS_RESOUCE is chosen because this prctl
    option allows a current process to adjust some
    fields of memory map descriptor which rather
    represent what the process owns: pointers to
    code, data, stack segments, command line,
    auxilary vector data and etc.

    Suggested-by: Michael Kerrisk <mtk.manpages@gmail.com>
    CC: Andrew Morton <akpm@linux-foundation.org>
    CC: Pavel Emelyanov <xemul@parallels.com>
    CC: Tejun Heo <tj@kernel.org>
    CC: Oleg Nesterov <oleg@redhat.com>
    CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    CC: Kees Cook <keescook@chromium.org>
    Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
    ---
    kernel/sys.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    Index: linux-2.6.git/kernel/sys.c
    ===================================================================
    --- linux-2.6.git.orig/kernel/sys.c
    +++ linux-2.6.git/kernel/sys.c
    @@ -1712,7 +1712,7 @@ static int prctl_set_mm(int opt, unsigne
    if (arg5 || (arg4 && opt != PR_SET_MM_AUXV))
    return -EINVAL;

    - if (!capable(CAP_SYS_ADMIN))
    + if (!capable(CAP_SYS_RESOURCE))
    return -EPERM;

    if (addr >= TASK_SIZE)

    \
     
     \ /
      Last update: 2012-03-07 13:55    [W:0.021 / U:1.252 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site