Oleg Nesterov e556799143 tracing: Kill the unbalanced tr->ref++ in tracing_buffers_open() ...

commit e70e78e3c8 upstream.

tracing_buffers_open() does trace_array_get() and then it wrongly
inrcements tr->ref again under trace_types_lock. This means that
every caller leaks trace_array:

	# cd /sys/kernel/debug/tracing/
	# mkdir instances/X
	# true < instances/X/per_cpu/cpu0/trace_pipe_raw
	# rmdir instances/X
	rmdir: failed to remove `instances/X': Device or resource busy

Link: http://lkml.kernel.org/r/20130719153644.GA18899@redhat.com

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-08-04 16:50:43 +08:00

..

blktrace.c

Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block

2013-05-08 11:51:05 -07:00

ftrace.c

ftrace: Use the rcu _notrace variants for rcu_dereference_raw() and friends

2013-05-28 22:48:00 -04:00

Kconfig

ring-buffer: Select IRQ_WORK

2013-05-03 19:24:17 -04:00

Makefile

…

power-traces.c

…

ring_buffer_benchmark.c

…

ring_buffer.c

ring-buffer: Do not poll non allocated cpu buffers

2013-05-28 10:53:20 -04:00

rpm-traces.c

…

trace_branch.c

tracing: Fix the branch tracer that broke with buffer change

2013-03-15 00:35:54 -04:00

trace_clock.c

tracing: Add "uptime" trace clock that uses jiffies

2013-03-15 00:36:09 -04:00

trace_entries.h

tracing: Add trace_puts() for even faster trace_printk() tracing

2013-03-15 00:35:55 -04:00

trace_event_perf.c

…

trace_events_filter_test.h

…

trace_events_filter.c

tracing: Fix leaks of filter preds

2013-05-15 13:49:18 -04:00

trace_events.c

tracing: Miscellaneous fixes for trace_array ref counting

2013-08-04 16:50:42 +08:00

trace_export.c

tracing: Fix some section mismatch warnings

2013-03-15 00:34:54 -04:00

trace_functions_graph.c

tracing: Consolidate max_tr into main trace_array structure

2013-03-15 00:35:40 -04:00

trace_functions.c

tracing: Add function probe to trigger stack traces

2013-03-15 00:36:05 -04:00

trace_irqsoff.c

tracing: Add function-trace option to disable function tracing of latency tracers

2013-03-15 00:36:08 -04:00

trace_kdb.c

tracing: Consolidate max_tr into main trace_array structure

2013-03-15 00:35:40 -04:00

trace_kprobe.c

tracing/kprobes: Make print_*probe_event static

2013-05-15 13:50:24 -04:00

trace_mmiotrace.c

tracing: Consolidate max_tr into main trace_array structure

2013-03-15 00:35:40 -04:00

trace_nop.c

…

trace_output.c

Merge tag 'trace-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-04-29 13:55:38 -07:00

trace_output.h

tracing: Rename trace_event_mutex to trace_event_sem

2013-03-15 13:22:10 -04:00

trace_printk.c

…

trace_probe.c

…

trace_probe.h

…

trace_sched_switch.c

tracing: Consolidate max_tr into main trace_array structure

2013-03-15 00:35:40 -04:00

trace_sched_wakeup.c

tracing: Add function-trace option to disable function tracing of latency tracers

2013-03-15 00:36:08 -04:00

trace_selftest_dynamic.c

…

trace_selftest.c

tracing: Fix bad parameter passed in branch selftest

2013-05-29 16:00:03 -04:00

trace_stack.c

Merge tag 'trace-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-04-29 13:55:38 -07:00

trace_stat.c

tracing: Check return value of tracing_init_dentry()

2013-04-12 23:02:32 -04:00

trace_stat.h

…

trace_syscalls.c

tracing: Fix irqs-off tag display in syscall tracing

2013-07-25 14:07:43 -07:00

trace_uprobe.c

uprobes: Fix return value in error handling path

2013-07-25 14:07:31 -07:00

trace.c

tracing: Kill the unbalanced tr->ref++ in tracing_buffers_open()

2013-08-04 16:50:43 +08:00

trace.h

tracing: Add trace_array_get/put() to event handling

2013-07-25 14:07:43 -07:00