linux-kernel - [PATCH 3/3] perf: Check for valid dso before creating map

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Message-Id: <20120531114656.23691.54223.sendpatchset@srdronam.in.ibm.com>
Date:	Thu, 31 May 2012 17:16:56 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Anton Arapov <anton@...hat.com>
Subject: [PATCH 3/3] perf: Check for valid dso before creating map

From: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>

dso__new() can return NULL. Hence verify dso before creating
a new map.

Suggested-by: Arnaldo Carvalho de Melo <acme@...radead.org>
Signed-off-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
---
 tools/perf/util/symbol.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index e2ba885..0ef529e 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -2786,8 +2786,11 @@ int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
 
 struct map *dso__new_map(const char *name)
 {
+	struct map *map = NULL;
 	struct dso *dso = dso__new(name);
-	struct map *map = map__new2(0, dso, MAP__FUNCTION);
+
+	if (dso)
+		map = map__new2(0, dso, MAP__FUNCTION);
 
 	return map;
 }


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