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tracing: Fix failure path in ftrace_graph_write()

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Don't call trace_parser_put() on uninitialized trace_parser.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4AB86639.3000003@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Li Zefan 2009-09-22 13:52:57 +08:00 committed by Ingo Molnar
parent 4ba7978e98
commit 1eb90f138b
1 changed files with 6 additions and 4 deletions
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10
kernel/trace/ftrace.c
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@ -2561,12 +2561,12 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
if (ftrace_graph_count >= FTRACE_GRAPH_MAX_FUNCS) {
ret = -EBUSY;
goto out;
goto out_unlock;
}
if (trace_parser_get_init(&parser, FTRACE_BUFF_MAX)) {
ret = -ENOMEM;
goto out;
goto out_unlock;
}
read = trace_get_user(&parser, ubuf, cnt, ppos);
@ -2578,12 +2578,14 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
ret = ftrace_set_func(ftrace_graph_funcs, &ftrace_graph_count,
parser.buffer);
if (ret)
goto out;
goto out_free;
}
ret = read;
out:
out_free:
trace_parser_put(&parser);
out_unlock:
mutex_unlock(&graph_lock);
return ret;