From b6eb7a21211e409aba13e14f941d512dd8b5de33 Mon Sep 17 00:00:00 2001
From: Arun Sharma <asharma@fb.com>
Date: Fri, 20 Apr 2012 15:41:35 -0700
Subject: [PATCH] perf/x86: Check if user fp is valid

commit bc6ca7b342d5ae15c3ba3081fd40271b8039fb25 upstream.

Signed-off-by: Arun Sharma <asharma@fb.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1334961696-19580-4-git-send-email-asharma@fb.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bwh: Backported to 3.2: also add user_addr_max() macro]
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
Reading git-format-patch failed