Commit-ID: 9cb627d5f38830ca19aa0dca52d1d3a633018bf7
Gitweb: http://git.kernel.org/tip/9cb627d5f38830ca19aa0dca52d1d3a633018bf7
Author: Li Zefan <lizf@xxxxxxxxxxxxxx>
AuthorDate: Wed, 1 Sep 2010 12:58:43 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Thu, 9 Sep 2010 20:38:51 +0200
perf, trace: Fix module leak
Commit 1c024eca (perf, trace: Optimize tracepoints by using
per-tracepoint-per-cpu hlist to track events) caused a module
refcount leak.
Reported-And-Tested-by: Avi Kivity <avi@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
LKML-Reference: <4C7E1F12.8030304@xxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/trace/trace_event_perf.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 000e6e8..31cc4cb 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -91,6 +91,8 @@ int perf_trace_init(struct perf_event *p_event)
tp_event->class && tp_event->class->reg &&
try_module_get(tp_event->mod)) {
ret = perf_trace_event_init(tp_event, p_event);
+ if (ret)
+ module_put(tp_event->mod);
break;
}
}
@@ -146,6 +148,7 @@ void perf_trace_destroy(struct perf_event *p_event)
}
}
out:
+ module_put(tp_event->mod);
mutex_unlock(&event_mutex);
}
--
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