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authorOleg Nesterov <oleg@redhat.com>2013-07-26 19:25:43 +0200
committerSteven Rostedt <rostedt@goodmis.org>2013-07-29 22:57:10 -0400
commitc5a44a1200c6eda2202434f25325e8ad19533fca (patch)
tree4ac8699d7e7ce648d888a2f2fb4889380d9b02a6 /mm/mmu_notifier.c
parente2912b091c26b8ea95e5e00a43a7ac620f6c94a6 (diff)
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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 'mm/mmu_notifier.c')
0 files changed, 0 insertions, 0 deletions