From: Dave Hansen <dave@sr71.net>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen <dave@sr71.net>,
dave.hansen@linux.intel.com
Subject: [PATCH 06/19] x86, mpx: Restrict mmap size check to bounds tables
Date: Mon, 18 May 2015 23:25:31 -0700 [thread overview]
Message-ID: <20150519062531.AFB46AB9@viggo.jf.intel.com> (raw)
In-Reply-To: <20150519062528.E2D5DDFF@viggo.jf.intel.com>
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);
_
next prev parent reply other threads:[~2015-05-19 6:30 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-19 6:25 [PATCH 00/19] x86, mpx updates for 4.2 (take 7) Dave Hansen
2015-05-19 6:25 ` [PATCH 01/19] x86, mpx, xsave: Fix up bad get_xsave_addr() assumptions Dave Hansen
2015-05-19 6:25 ` [PATCH 02/19] x86, fpu: Wrap get_xsave_addr() to make it safer Dave Hansen
2015-05-19 8:15 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 03/19] x86, mpx: Use new get_xsave_field_ptr() Dave Hansen
2015-05-19 8:16 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 04/19] x86, mpx: Cleanup: Do not pass task around when unnecessary Dave Hansen
2015-05-19 8:16 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 05/19] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2015-05-19 6:25 ` [PATCH 07/19] x86, mpx: boot-time disable Dave Hansen
2015-05-19 6:25 ` Dave Hansen [this message]
2015-05-19 6:25 ` [PATCH 08/19] x86, mpx: trace #BR exceptions Dave Hansen
2015-05-19 6:25 ` [PATCH 09/19] x86, mpx: trace entry to bounds exception paths Dave Hansen
2015-05-19 8:17 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 11/19] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-05-19 6:25 ` [PATCH 10/19] x86, mpx: Trace the attempts to find " Dave Hansen
2015-05-19 8:17 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 13/19] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2015-05-19 6:25 ` [PATCH 12/19] x86: make is_64bit_mm() widely available Dave Hansen
2015-05-19 6:25 ` [PATCH 17/19] x86, mpx: rewrite unmap code Dave Hansen
2015-05-19 6:25 ` [PATCH 15/19] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2015-05-19 8:18 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 14/19] x86, mpx: new directory entry to addr helper Dave Hansen
2015-05-19 6:25 ` [PATCH 16/19] x86, mpx: support 32-bit binaries on 64-bit kernel Dave Hansen
2015-05-19 8:21 ` Thomas Gleixner
2015-05-19 6:25 ` [PATCH 18/19] x86, mpx: do not count MPX VMAs as neighbors when unmapping Dave Hansen
2015-05-19 6:25 ` [PATCH 19/19] x86, mpx: allow mixed binaries again Dave Hansen
2015-05-20 10:05 ` [PATCH 00/19] x86, mpx updates for 4.2 (take 7) Ingo Molnar
2015-05-26 16:49 ` Dave Hansen
2015-05-27 12:18 ` Ingo Molnar
2015-05-27 18:36 [PATCH 00/19] x86, mpx updates for 4.2 (take 8) Dave Hansen
2015-05-27 18:36 ` [PATCH 06/19] x86, mpx: Restrict mmap size check to bounds tables Dave Hansen
2015-06-07 18:37 [PATCH 00/19] x86, mpx updates for 4.2 (take 9) Dave Hansen
2015-06-07 18:37 ` [PATCH 06/19] x86, mpx: Restrict mmap size check to bounds tables Dave Hansen
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