[PATCH] perf dwarf-regs: s390: Fix an off by one bug

[Dan Carpenter]

Change the > comparison to >= to prevent an out of bounds access of
the dwarf_s390_regnums[] array.

Fixes: 1e452dd850f3 ("perf dwarf-regs: Add S390 perf to DWARF register number mapping functions")
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
 tools/perf/util/dwarf-regs-arch/dwarf-regs-s390.c | 1 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/dwarf-regs-arch/dwarf-regs-s390.c b/tools/perf/util/dwarf-regs-arch/dwarf-regs-s390.c
index 310a37451bdc..f79216a7665a 100644
--- a/tools/perf/util/dwarf-regs-arch/dwarf-regs-s390.c
+++ b/tools/perf/util/dwarf-regs-arch/dwarf-regs-s390.c
@@ -45,7 +45,7 @@ int __get_dwarf_regnum_for_perf_regnum_s390(int perf_regnum)
 	if (perf_regnum == 0)
 		return 0;
 
-	if (perf_regnum <  0 || perf_regnum > (int)ARRAY_SIZE(dwarf_s390_regnums) ||
+	if (perf_regnum <  0 || perf_regnum >= (int)ARRAY_SIZE(dwarf_s390_regnums) ||
 	    dwarf_s390_regnums[perf_regnum] == 0)
 		return -ENOENT;
 
-- 
2.53.0