Messages in this thread Patch in this message | | | Subject | [PATCH 06/19] x86, mpx: Restrict mmap size check to bounds tables | From | Dave Hansen <> | Date | Mon, 18 May 2015 23:25:31 -0700 |
| |
From: Dave Hansen <dave.hansen@linux.intel.com>
The comment and code here are confusing. We do not currently allocate the bounds directory in the kernel.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> ---
b/arch/x86/mm/mpx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN arch/x86/mm/mpx.c~x86-mpx-we-do-not-allocate-the-bounds-directory arch/x86/mm/mpx.c --- a/arch/x86/mm/mpx.c~x86-mpx-we-do-not-allocate-the-bounds-directory 2015-05-18 17:48:59.952468669 -0700 +++ b/arch/x86/mm/mpx.c 2015-05-18 17:48:59.955468804 -0700 @@ -47,8 +47,8 @@ static unsigned long mpx_mmap(unsigned l vm_flags_t vm_flags; struct vm_area_struct *vma; - /* Only bounds table and bounds directory can be allocated here */ - if (len != MPX_BD_SIZE_BYTES && len != MPX_BT_SIZE_BYTES) + /* Only bounds table can be allocated here */ + if (len != MPX_BT_SIZE_BYTES) return -EINVAL; down_write(&mm->mmap_sem); _
| |