linux-kernel - [PATCH 3.4 53/99] perf tools: Fix cache event name generation

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Message-Id: <20140308010613.310796412@linuxfoundation.org>
Date:	Fri,  7 Mar 2014 17:07:49 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Joel Uckelman <joel@...htboxtechnologies.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Vinson Lee <vlee@...pensource.com>
Subject: [PATCH 3.4 53/99] perf tools: Fix cache event name generation

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jiri Olsa <jolsa@...hat.com>

commit 275ef3878f698941353780440fec6926107a320b upstream.

If the event name is specified with all 3 components, the last one
overwrites the previous one during the name composing within the
parse_events_add_cache function.

Fixing this by properly adjusting the string index.

Reported-by: Joel Uckelman <joel@...htboxtechnologies.com>
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Joel Uckelman <joel@...htboxtechnologies.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LPU-Reference: 20120905175133.GA18352@...va.brq.redhat.com
[ committer note: Remove the newline fix, done already in 42e1fb7 ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Vinson Lee <vlee@...pensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/perf/util/parse-events.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -413,7 +413,7 @@ int parse_events_add_cache(struct list_h
 	for (i = 0; (i < 2) && (op_result[i]); i++) {
 		char *str = op_result[i];
 
-		snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
+		n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 
 		if (cache_op == -1) {
 			cache_op = parse_aliases(str, hw_cache_op,


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