This is a note to let you know that I've just added the patch titled

x86/mpx/selftests: Fix up weird arrays

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86-mpx-selftests-fix-up-weird-arrays.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Tue Dec 12 13:26:17 CET 2017

From: Dave Hansen dave.hansen@linux.intel.com Date: Fri, 10 Nov 2017 16:12:29 -0800 Subject: x86/mpx/selftests: Fix up weird arrays

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

[ Upstream commit a6400120d042397675fcf694060779d21e9e762d ]

The MPX hardware data structurse are defined in a weird way: they define their size in bytes and then union that with the type with which we want to access them.

Yes, this is weird, but it does work. But, new GCC's complain that we are accessing the array out of bounds. Just make it a zero-sized array so gcc will stop complaining. There was not really a bug here.

Signed-off-by: Dave Hansen dave.hansen@linux.intel.com Acked-by: Thomas Gleixner tglx@linutronix.de Cc: Andy Lutomirski luto@kernel.org Cc: Borislav Petkov bp@alien8.de Cc: Brian Gerst brgerst@gmail.com Cc: Denys Vlasenko dvlasenk@redhat.com Cc: H. Peter Anvin hpa@zytor.com Cc: Josh Poimboeuf jpoimboe@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Link: http://lkml.kernel.org/r/20171111001229.58A7933D@viggo.jf.intel.com Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/x86/mpx-hw.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/x86/mpx-hw.h +++ b/tools/testing/selftests/x86/mpx-hw.h @@ -51,14 +51,14 @@ struct mpx_bd_entry { union { char x[MPX_BOUNDS_DIR_ENTRY_SIZE_BYTES]; - void *contents[1]; + void *contents[0]; }; } __attribute__((packed));

struct mpx_bt_entry { union { char x[MPX_BOUNDS_TABLE_ENTRY_SIZE_BYTES]; - unsigned long contents[1]; + unsigned long contents[0]; }; } __attribute__((packed));

Patches currently in stable-queue which might be from dave.hansen@linux.intel.com are

queue-4.9/x86-mpx-selftests-fix-up-weird-arrays.patch queue-4.9/x86-pci-make-broadcom_postcore_init-check-acpi_disabled.patch