From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Date: Wed, 16 Sep 2015 12:52:42 +0000 (+0900)
Subject: perf probe: Fix a segfault when removing uprobe events
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0fb18553478dee5b3d8dc0af4f99a5288e81142f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

perf probe: Fix a segfault when removing uprobe events

Fix a segfault bug and a small mistake in perf probe -d.

Since the "ulist" in perf_del_probe_events is never initialized,
strlist__add(ulist, *) always causes a segfault when removing
uprobe events by perf probe -d.

Also, the "str" local variable is never released if fail to
allocate the "klist". This fixes it too.

This has been introduced by the commit e607f1426b58 ("perf probe:
Print deleted events in cmd_probe()").

Reported-by: Milian Wolff <milian.wolff@kdab.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20150916125241.4446.44805.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 94385ee89dc8..f7882ae9ebc6 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -380,8 +380,11 @@ static int perf_del_probe_events(struct strfilter *filter)
 		goto out;
 
 	klist = strlist__new(NULL, NULL);
-	if (!klist)
-		return -ENOMEM;
+	ulist = strlist__new(NULL, NULL);
+	if (!klist || !ulist) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
 	ret = probe_file__get_events(kfd, filter, klist);
 	if (ret == 0) {