Patch "powerpc/bpf/jit: Disable classic BPF JIT on ppc64le" has been added to the 4.6-stable tree

Patch "powerpc/bpf/jit: Disable classic BPF JIT on ppc64le" has been added to the 4.6-stable tree

[gregkh]

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

    powerpc/bpf/jit: Disable classic BPF JIT on ppc64le

to the 4.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     powerpc-bpf-jit-disable-classic-bpf-jit-on-ppc64le.patch
and it can be found in the queue-4.6 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 844e3be47693f92a108cb1fb3b0606bf25e9c7a6 Mon Sep 17 00:00:00 2001
From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
Date: Wed, 22 Jun 2016 21:55:01 +0530
Subject: powerpc/bpf/jit: Disable classic BPF JIT on ppc64le

From: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>

commit 844e3be47693f92a108cb1fb3b0606bf25e9c7a6 upstream.

Classic BPF JIT was never ported completely to work on little endian
powerpc. However, it can be enabled and will crash the system when used.
As such, disable use of BPF JIT on ppc64le.

Fixes: 7c105b63bd98 ("powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option.")
Reported-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
 arch/powerpc/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -126,7 +126,7 @@ config PPC
 	select IRQ_FORCED_THREADING
 	select HAVE_RCU_TABLE_FREE if SMP
 	select HAVE_SYSCALL_TRACEPOINTS
-	select HAVE_BPF_JIT
+	select HAVE_BPF_JIT if CPU_BIG_ENDIAN
 	select HAVE_ARCH_JUMP_LABEL
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_HAS_GCOV_PROFILE_ALL


Patches currently in stable-queue which might be from naveen.n.rao@linux.vnet.ibm.com are

queue-4.6/powerpc-bpf-jit-disable-classic-bpf-jit-on-ppc64le.patch