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authorLi Zefan <lizf@cn.fujitsu.com>2009-09-22 13:52:57 +0800
committerIngo Molnar <mingo@elte.hu>2009-09-22 10:28:56 +0200
commit1eb90f138b3fb4cc15f3acec94aa788e846269f7 (patch)
treed5e361214065598094d9b4ec71b3591edeaa74e5 /kernel/trace
parent4ba7978e98a3ff92cebfb0f31a02c309e3ffa1fe (diff)
downloadop-kernel-dev-1eb90f138b3fb4cc15f3acec94aa788e846269f7.zip
op-kernel-dev-1eb90f138b3fb4cc15f3acec94aa788e846269f7.tar.gz
tracing: Fix failure path in ftrace_graph_write()
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>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/ftrace.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a8fe478..5c5cb9b 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -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;
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