perf bench: Fix segfault at the end of an 'all' execution

At the end of

  $ perf bench all

the program segfaults because it attempts to dereference a NULL
pointer. Fix this fault.

Signed-off-by: Ramkumar Ramachandra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Jiri Olsa <[email protected]>

diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index f600b74216da4b876ee0e5f127eae3eab347d447..1e6e77710545afc472eae5c0f5e5a63f5ec432d1 100644 (file)
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -86,7 +86,7 @@ static struct collection collections[] = {
 
 /* Iterate over all benchmarks within a collection: */
 #define for_each_bench(coll, bench) \
-       for (bench = coll->benchmarks; bench->name; bench++)
+       for (bench = coll->benchmarks; bench && bench->name; bench++)
 
 static void dump_benchmarks(struct collection *coll)
 {