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| author | Oleg Nesterov <oleg@redhat.com> | 2013-07-26 17:25:43 (GMT) |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-07-30 02:57:10 (GMT) |
| commit | c5a44a1200c6eda2202434f25325e8ad19533fca (patch) | |
| tree | 4ac8699d7e7ce648d888a2f2fb4889380d9b02a6 /ipc | |
| parent | e2912b091c26b8ea95e5e00a43a7ac620f6c94a6 (diff) | |
| download | linux-c5a44a1200c6eda2202434f25325e8ad19533fca.tar.xz | |
tracing: Change f_start() to take event_mutex and verify i_private != NULL
trace_format_open() and trace_format_seq_ops are racy, nothing
protects ftrace_event_call from trace_remove_event_call().
Change f_start() to take event_mutex and verify i_private != NULL,
change f_stop() to drop this lock.
This fixes nothing, but now we can change debugfs_remove("format")
callers to nullify ->i_private and fix the the problem.
Note: the usage of event_mutex is sub-optimal but simple, we can
change this later.
Link: http://lkml.kernel.org/r/20130726172543.GA3622@redhat.com
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions