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    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

    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 <>
    CC: Andrew Morton <>
    CC: Pavel Emelyanov <>
    CC: Tejun Heo <>
    CC: Oleg Nesterov <>
    CC: KOSAKI Motohiro <>
    CC: Kees Cook <>
    Signed-off-by: Cyrill Gorcunov <>
    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:0.020 / U:5.444 seconds]
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