Commit-ID: 1e6dd8adc78d4a153db253d051fd4ef6c49c9019
Gitweb: http://git.kernel.org/tip/1e6dd8adc78d4a153db253d051fd4ef6c49c9019
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
AuthorDate: Wed, 5 Sep 2012 15:31:26 +0300
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 19 Sep 2012 17:08:40 +0200
perf: Fix off by one test in perf_reg_value()
The test should be >= ARRAY_SIZE() instead of > ARRAY_SIZE().
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20120905123126.GC6128@elgon.mountain
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/perf_regs.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/perf_regs.c b/arch/x86/kernel/perf_regs.c
index c5a3e5c..e309cc5 100644
--- a/arch/x86/kernel/perf_regs.c
+++ b/arch/x86/kernel/perf_regs.c
@@ -57,7 +57,7 @@ static unsigned int pt_regs_offset[PERF_REG_X86_MAX] = {
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
- if (WARN_ON_ONCE(idx > ARRAY_SIZE(pt_regs_offset)))
+ if (WARN_ON_ONCE(idx >= ARRAY_SIZE(pt_regs_offset)))
return 0;
return regs_get_register(regs, pt_regs_offset[idx]);
--
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