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Message-Id: <20150527183612.ABAB34DF@viggo.jf.intel.com> Date: Wed, 27 May 2015 11:36:12 -0700 From: Dave Hansen <dave@...1.net> To: linux-kernel@...r.kernel.org Cc: x86@...nel.org, tglx@...utronix.de, Dave Hansen <dave@...1.net>, dave.hansen@...ux.intel.com Subject: [PATCH 06/19] x86, mpx: Restrict mmap size check to bounds tables From: Dave Hansen <dave.hansen@...ux.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@...ux.intel.com> Reviewed-by: Thomas Gleixner <tglx@...utronix.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 2015-05-27 09:32:16.681542138 -0700 +++ b/arch/x86/mm/mpx.c 2015-05-27 09:32:16.684542274 -0700 @@ -46,8 +46,8 @@ 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); _ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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