Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Steven Rostedt (Red Hat) 8e2e2fa471 tracing: Add trace_array_get/put() to event handling ... Commit a695cb5816 "tracing: Prevent deleting instances when they are being read" tried to fix a race between deleting a trace instance and reading contents of a trace file. But it wasn't good enough. The following could crash the kernel: # cd /sys/kernel/debug/tracing/instances # ( while :; do mkdir foo; rmdir foo; done ) & # ( while :; do echo 1 > foo/events/sched/sched_switch 2> /dev/null; done ) & Luckily this can only be done by root user, but it should be fixed regardless. The problem is that a delete of the file can happen after the write to the event is opened, but before the enabling happens. The solution is to make sure the trace_array is available before succeeding in opening for write, and incerment the ref counter while opened. Now the instance can be deleted when the events are writing to the buffer, but the deletion of the instance will disable all events before the instance is actually deleted. Cc: stable@vger.kernel.org # 3.10 Reported-by: Alexander Lam <azl@google.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2013-07-02 17:13:34 -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: Do not run selftest if command line parameter is set	2013-07-01 20:57:15 -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.c	ring-buffer: Do not poll non allocated cpu buffers	2013-05-28 10:53:20 -04:00
ring_buffer_benchmark.c
rpm-traces.c
trace.c	tracing: Get trace_array ref counts when accessing trace files	2013-07-02 10:17:04 -04:00
trace.h	tracing: Add trace_array_get/put() to event handling	2013-07-02 17:13:34 -04:00
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.c	tracing: Add trace_array_get/put() to event handling	2013-07-02 17:13:34 -04:00
trace_events_filter.c	tracing: Add binary '&' filter for events	2013-06-19 23:30:40 -04:00
trace_events_filter_test.h
trace_export.c	tracing: Fix some section mismatch warnings	2013-03-15 00:34:54 -04:00
trace_functions.c	tracing: Add function probe to trigger a ftrace dump of current CPU trace	2013-06-11 18:38:48 -04:00
trace_functions_graph.c	tracing: Consolidate max_tr into main trace_array structure	2013-03-15 00:35:40 -04:00
trace_irqsoff.c	tracing: Use flag buffer_disabled for irqsoff tracer	2013-07-01 20:34:28 -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: Don't pass addr=ip to perf_trace_buf_submit()	2013-07-01 20:34:28 -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.c	ftrace: Do not run selftest if command line parameter is set	2013-07-01 20:57:15 -04:00
trace_selftest_dynamic.c
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