[PATCH 19/19] x86, mpx: allow mixed binaries again

Dave Hansen
2015-05-08T19:01:27Z

From: Dave Hansen <dave.hansen@linux.intel.com>

We explicitly disable allowing 32-bit binaries to enable
MPX on 64-bit kernels. Re-allow that.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
---

b/arch/x86/mm/mpx.c | 6 ------
1 file changed, 6 deletions(-)

diff -puN arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again arch/x86/mm/mpx.c
--- a/arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again 2015-05-08 11:46:23.253134695 -0700
+++ b/arch/x86/mm/mpx.c 2015-05-08 11:46:23.256134830 -0700
@@ -368,12 +368,6 @@ static __user void *mpx_get_bounds_dir(v
return MPX_INVALID_BOUNDS_DIR;

/*
- * 32-bit binaries on 64-bit kernels are currently
- * unsupported.
- */
- if (IS_ENABLED(CONFIG_X86_64) && test_thread_flag(TIF_IA32))
- return MPX_INVALID_BOUNDS_DIR;
- /*
* The bounds directory pointer is stored in a register
* only accessible if we first do an xsave.
*/
_