Masami Hiramatsu 6ed0106667 tracing: Return -EBUSY when event_enable_func() fails to get module ...

Since try_module_get() returns false( = 0) when it fails to
pindown a module, event_enable_func() returns 0 which means
"succeed". This can cause a kernel panic when the entry
is removed, because the event is already released.

This fixes the bug by returning -EBUSY, because the reason
why it fails is that the module is being removed at that time.

Link: http://lkml.kernel.org/r/20130516114848.13508.97899.stgit@mhiramat-M0-7522

Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2013-05-16 11:01:16 -04:00

..

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: Fix function probe when more than one probe is added

2013-05-09 20:16:27 -04:00

Kconfig

ring-buffer: Select IRQ_WORK

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

Makefile

trace: Stop compiling in trace_clock unconditionally

2012-09-13 22:52:08 -04:00

power-traces.c

PM / tracing: remove deprecated power trace API

2013-01-26 00:39:12 +01:00

ring_buffer_benchmark.c

tracing: Use NUMA allocation for per-cpu ring buffer pages

2011-06-14 22:04:39 -04:00

ring_buffer.c

Tracing updates for Linux 3.10

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

rpm-traces.c

PM / Runtime: Introduce trace points for tracing rpm_* functions

2011-09-27 22:53:27 +02:00

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

perf/core improvements and fixes:

2012-08-21 11:27:00 +02:00

trace_events_filter_test.h

tracing/filter: Add startup tests for events filter

2011-08-19 14:35:59 -04:00

trace_events_filter.c

tracing: Fix leaks of filter preds

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

trace_events.c

tracing: Return -EBUSY when event_enable_func() fails to get module

2013-05-16 11:01:16 -04:00

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

Tracing updates for Linux 3.10

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

tracing: Add percpu buffers for trace_printk()

2012-04-23 21:15:55 -04:00

trace_probe.c

tracing: Replace strict_strto* with kstrto*

2012-10-31 16:45:23 -04:00

trace_probe.h

uprobes/tracing: Introduce is_trace_uprobe_enabled()

2013-02-08 18:24:30 +01:00

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

ftrace: Add self-tests for multiple function trace users

2011-05-18 19:24:51 -04:00

trace_selftest.c

tracing: Fix ftrace_dump()

2013-03-15 19:24:56 -04:00

trace_stack.c

Tracing updates for Linux 3.10

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 comment about prefix in arch_syscall_match_sym_name()

2013-03-15 13:22:09 -04:00

trace_uprobe.c

uprobes/perf: Avoid perf_trace_buf_prepare/submit if ->perf_events is empty

2013-04-15 17:39:52 +02:00

trace.c

tracing: Fix small merge bug

2013-04-30 07:23:08 -07:00

trace.h

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-04-30 07:41:01 -07:00