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libtraceevent: Improve error handling of tep_plugin_add_option() API

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In case of memory error, ensure all allocated resources are freed.
Do not append broken option in trace_plugin_options list.

Link: https://lore.kernel.org/r/CAM9d7cizjF+fbK7YzmsBDgrx__4YAOsmEq67D3sWET8FF+YdFA@mail.gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200714103027.2477584-5-tz.stoyanov@gmail.com
Link: https://lore.kernel.org/linux-trace-devel/20200716092014.2613403-5-tz.stoyanov@gmail.com

Suggested-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200722011755.158091410@goodmis.org
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Tzvetomir Stoyanov (VMware) 2020-07-21 21:16:47 -04:00 committed by Arnaldo Carvalho de Melo
parent 7db6330dca
commit b796162bc4
1 changed files with 9 additions and 7 deletions
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16
tools/lib/traceevent/event-plugin.c
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@ -361,23 +361,25 @@ int tep_plugin_add_option(const char *name, const char *val)
if (!op) {
op = malloc(sizeof(*op));
if (!op)
return -ENOMEM;
goto out_free;
memset(op, 0, sizeof(*op));
op->next = trace_plugin_options;
trace_plugin_options = op;
op->plugin = plugin;
op->option = option_str;
if (val) {
op->value = strdup(val);
if (!op->value)
if (!op->value) {
free(op);
goto out_free;
}
}
op->next = trace_plugin_options;
trace_plugin_options = op;
}
return process_option(plugin, option_str, val);
out_free:
out_free:
free(plugin);
free(option_str);
return -ENOMEM;
}