[tip:perf/urgent] perf bench: Fix segfault at the end of an 'all' execution

[tip-bot for Ramkumar Ramachandra <tipbot@zytor.com>]

Commit-ID:  5673872d4afd2584e075cf2b1adb2cccec46a0f3
Gitweb:     http://git.kernel.org/tip/5673872d4afd2584e075cf2b1adb2cccec46a0f3
Author:     Ramkumar Ramachandra <artagnon@gmail.com>
AuthorDate: Thu, 27 Mar 2014 19:50:19 -0400
Committer:  Jiri Olsa <jolsa@redhat.com>
CommitDate: Mon, 14 Apr 2014 12:55:53 +0200

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 <artagnon@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1395964219-22173-4-git-send-email-artagnon@gmail.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
 tools/perf/builtin-bench.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index f600b74..1e6e777 100644
--- 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)
 {