Steven Rostedt (Red Hat) 8b8b36834d ring-buffer: Check if buffer exists before polling ... The per_cpu buffers are created one per possible CPU. But these do not mean that those CPUs are online, nor do they even exist. With the addition of the ring buffer polling, it assumes that the caller polls on an existing buffer. But this is not the case if the user reads trace_pipe from a CPU that does not exist, and this causes the kernel to crash. Simple fix is to check the cpu against buffer bitmask against to see if the buffer was allocated or not and return -ENODEV if it is not. More updates were done to pass the -ENODEV back up to userspace. Link: http://lkml.kernel.org/r/5393DB61.6060707@oracle.com Reported-by: Sasha Levin <sasha.levin@oracle.com> Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2014-06-10 09:46:00 -04:00
..
blktrace.c	Most of the changes were largely clean ups, and some documentation.	2014-04-03 10:26:31 -07:00
ftrace.c	ftrace: Remove FTRACE_UPDATE_MODIFY_CALL_REGS flag	2014-05-14 11:37:30 -04:00
Kconfig	tracing: Add tracepoint benchmark tracepoint	2014-05-29 22:49:54 -04:00
Makefile	tracing: Add tracepoint benchmark tracepoint	2014-05-29 22:49:54 -04:00
power-traces.c	PM / tracing: remove deprecated power trace API	2013-01-26 00:39:12 +01:00
ring_buffer_benchmark.c	trace: Replace hardcoding of 19 with MAX_NICE	2014-02-27 12:41:03 +01:00
ring_buffer.c	ring-buffer: Check if buffer exists before polling	2014-06-10 09:46:00 -04:00
rpm-traces.c	PM / Runtime: Introduce trace points for tracing rpm_* functions	2011-09-27 22:53:27 +02:00
trace_benchmark.c	tracing: Only calculate stats of tracepoint benchmarks for 2^32 times	2014-06-06 00:41:38 -04:00
trace_benchmark.h	tracing: Add tracepoint benchmark tracepoint	2014-05-29 22:49:54 -04:00
trace_branch.c	tracing: Update event filters for multibuffer	2013-11-05 16:50:20 -05:00
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: Disallow user-space stack dumps for function trace events	2014-03-11 11:57:58 +01:00
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: Add and use generic set_trigger_filter() implementation	2013-12-21 22:02:17 -05:00
trace_events_trigger.c	tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints	2014-04-08 20:43:28 -04:00
trace_events.c	tracing: Return error if ftrace_trace_arrays list is empty	2014-06-06 04:47:46 -04:00
trace_export.c	tracing: Fix anonymous unions in struct ftrace_event_call	2014-04-09 20:02:55 -04:00
trace_functions_graph.c	tracing: Add funcgraph_tail option to print function name after closing braces	2014-05-20 23:29:32 -04:00
trace_functions.c	tracing: Remove mock up poll wait function	2014-04-30 08:40:05 -04:00
trace_irqsoff.c	tracing: Allow irq/preempt tracers to be used by instances	2014-04-21 13:59:29 -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: Avoid self tests if tracing is disabled on boot up	2014-06-06 04:53:39 -04:00
trace_mmiotrace.c	tracing: Update event filters for multibuffer	2013-11-05 16:50:20 -05:00
trace_nop.c	tracing: Remove mock up poll wait function	2014-04-30 08:40:05 -04:00
trace_output.c	tracing: Add __bitmask() macro to trace events to cpumasks and other bitmasks	2014-05-15 11:29:37 -04:00
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 __tracepoint_string() to export string pointers	2013-07-26 13:39:44 -04:00
trace_probe.c	tracing/uprobes: Add @+file_offset fetch method	2014-01-02 20:57:05 -05:00
trace_probe.h	tracing/uprobes: Support ftrace_event_file base multibuffer	2014-02-20 12:30:09 -05:00
trace_sched_switch.c	tracing: Update event filters for multibuffer	2013-11-05 16:50:20 -05:00
trace_sched_wakeup.c	tracing: Remove mock up poll wait function	2014-04-30 08:40:05 -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: Add static to local functions	2014-04-21 14:00:46 -04:00
trace_stack.c	tracing: Print max callstack on stacktrace bug	2014-06-02 16:43:49 -04:00
trace_stat.c	trace/trace_stat: use rbtree postorder iteration helper instead of opencoding	2013-11-05 16:01:47 -05:00
trace_stat.h	tracing/stat: Add stat_release() callback	2009-07-10 12:14:05 +02:00
trace_syscalls.c	tracing: Consolidate event trigger code	2014-01-09 21:20:07 -05:00
trace_uprobe.c	tracing/uprobes: Fix uprobe_cpu_buffer memory leak	2014-04-17 10:44:42 -04:00
trace.c	ring-buffer: Check if buffer exists before polling	2014-06-10 09:46:00 -04:00
trace.h	tracing: Return error if ftrace_trace_arrays list is empty	2014-06-06 04:47:46 -04:00