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linux/kernel/trace
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Steven Rostedt (VMware) edb096e007 ftrace: Fix memleak when unregistering dynamic ops when tracing disabled 
If function tracing is disabled by the user via the function-trace option or
the proc sysctl file, and a ftrace_ops that was allocated on the heap is
unregistered, then the shutdown code exits out without doing the proper
clean up. This was found via kmemleak and running the ftrace selftests, as
one of the tests unregisters with function tracing disabled.

 # cat kmemleak
unreferenced object 0xffffffffa0020000 (size 4096):
  comm "swapper/0", pid 1, jiffies 4294668889 (age 569.209s)
  hex dump (first 32 bytes):
    55 ff 74 24 10 55 48 89 e5 ff 74 24 18 55 48 89  U.t$.UH...t$.UH.
    e5 48 81 ec a8 00 00 00 48 89 44 24 50 48 89 4c  .H......H.D$PH.L
  backtrace:
    [<ffffffff81d64665>] kmemleak_vmalloc+0x85/0xf0
    [<ffffffff81355631>] __vmalloc_node_range+0x281/0x3e0
    [<ffffffff8109697f>] module_alloc+0x4f/0x90
    [<ffffffff81091170>] arch_ftrace_update_trampoline+0x160/0x420
    [<ffffffff81249947>] ftrace_startup+0xe7/0x300
    [<ffffffff81249bd2>] register_ftrace_function+0x72/0x90
    [<ffffffff81263786>] trace_selftest_ops+0x204/0x397
    [<ffffffff82bb8971>] trace_selftest_startup_function+0x394/0x624
    [<ffffffff81263a75>] run_tracer_selftest+0x15c/0x1d7
    [<ffffffff82bb83f1>] init_trace_selftests+0x75/0x192
    [<ffffffff81002230>] do_one_initcall+0x90/0x1e2
    [<ffffffff82b7d620>] kernel_init_freeable+0x350/0x3fe
    [<ffffffff81d61ec3>] kernel_init+0x13/0x122
    [<ffffffff81d72c6a>] ret_from_fork+0x2a/0x40
    [<ffffffffffffffff>] 0xffffffffffffffff

Cc: stable@vger.kernel.org
Fixes: 12cce594fa ("ftrace/x86: Allow !CONFIG_PREEMPT dynamic ops to use allocated trampolines")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2017-09-01 13:55:49 -04:00
..
blktrace.c
block: switch bios to blk_status_t
2017-06-09 09:27:32 -06:00
bpf_trace.c
bpf: fix bpf_trace_printk on 32 bit archs
2017-08-15 17:32:15 -07:00
ftrace.c
ftrace: Fix memleak when unregistering dynamic ops when tracing disabled
2017-09-01 13:55:49 -04:00
Kconfig
tracing: Rename update the enum_map file
2017-06-13 17:13:06 -04:00
Makefile
perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS
2017-03-01 10:26:39 +01:00
power-traces.c
cpufreq: schedutil: New governor based on scheduler utilization data
2016-04-02 01:09:12 +02:00
ring_buffer_benchmark.c
ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU
2017-08-02 14:23:02 -04:00
ring_buffer.c
ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU
2017-08-02 14:23:02 -04:00
rpm-traces.c
…
trace_benchmark.c
tracing: Have the trace_event benchmark thread call cond_resched_rcu_qs()
2017-04-17 15:21:19 -04:00
trace_benchmark.h
tracing: Have the reg function allow to fail
2016-12-09 09:13:30 -05:00
trace_branch.c
tracing: Add the constant count for branch tracer
2017-01-19 08:57:41 -05:00
trace_clock.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>
2017-03-02 08:42:27 +01:00
trace_entries.h
trace: make trace_hwlat timestamp y2038 safe
2017-05-08 17:15:15 -07:00
trace_event_perf.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-05-17 16:26:30 -07:00
trace_events_filter_test.h
…
trace_events_filter.c
tracing: Fix freeing of filter in create_filter() when set_str is false
2017-08-24 10:07:38 -04:00
trace_events_hist.c
sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>
2017-03-02 08:42:38 +01:00
trace_events_trigger.c
sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>
2017-03-02 08:42:38 +01:00
trace_events.c
tracing: Only have rmmod clear buffers that its events were active in
2017-08-31 17:47:38 -04:00
trace_export.c
tracing: ftrace_event_is_function() can return boolean
2015-11-02 14:28:05 -05:00
trace_functions_graph.c
tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too
2016-12-09 09:21:35 -05:00
trace_functions.c
ftrace: Fix regression with module command in stack_trace_filter
2017-06-29 10:05:45 -04:00
trace_hwlat.c
trace: make trace_hwlat timestamp y2038 safe
2017-05-08 17:15:15 -07:00
trace_irqsoff.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
trace_kdb.c
tracing: Move trace_flags from global to a trace_array field
2015-09-30 15:22:55 -04:00
trace_kprobe.c
A few more minor updates:
2017-07-13 13:17:19 -07:00
trace_mmiotrace.c
tracing: Expose CPU physical addresses (resource values) for PCI devices
2016-06-20 09:54:22 -04:00
trace_nop.c
tracing: Fix typoes in code comment and printk in trace_nop.c
2016-03-08 11:23:57 -05:00
trace_output.c
tracing: Add support for display of tgid in trace output
2017-06-27 13:30:28 -04:00
trace_output.h
tracing: Turn seq_print_user_ip() into a static function
2015-09-28 10:16:12 -04:00
trace_printk.c
tracing: Handle NULL formats in hold_module_trace_bprintk_format()
2016-06-20 09:46:12 -04:00
trace_probe.c
tracing/probes: Fix a warning message to show correct maximum length
2017-02-15 10:32:48 -05:00
trace_probe.h
perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS
2017-03-01 10:26:39 +01:00
trace_sched_switch.c
tracing: Add support for recording tgid of tasks
2017-06-27 13:30:28 -04:00
trace_sched_wakeup.c
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
trace_selftest_dynamic.c
…
trace_selftest.c
ftrace: Fix selftest goto location on error
2017-09-01 12:04:09 -04:00
trace_seq.c
tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks
2015-02-13 21:21:37 -08:00
trace_stack.c
tracing: Do note expose stack_trace_filter without DYNAMIC_FTRACE
2017-07-11 19:21:04 -04:00
trace_stat.c
kernel/...: convert pr_warning to pr_warn
2016-03-22 15:36:02 -07:00
trace_stat.h
…
trace_syscalls.c
tracing/syscalls: fix multiline in error message text
2016-09-29 10:25:23 +02:00
trace_uprobe.c
sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>
2017-03-02 08:42:38 +01:00
trace.c
tracing: Only have rmmod clear buffers that its events were active in
2017-08-31 17:47:38 -04:00
trace.h
tracing: Only have rmmod clear buffers that its events were active in
2017-08-31 17:47:38 -04:00
tracing_map.c
tracing: Fix kmemleak in tracing_map_array_free()
2017-08-24 10:05:51 -04:00
tracing_map.h
tracing: Update some tracing_map constants and comments
2016-04-19 12:16:06 -04:00