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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 e607f1426b ("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>
hifive-unleashed-5.1
Masami Hiramatsu 2015-09-16 21:52:42 +09:00 committed by Arnaldo Carvalho de Melo
parent 96f3eda67f
commit 0fb1855347
1 changed files with 5 additions and 2 deletions
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7
tools/perf/builtin-probe.c
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@ -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) {