Chunyu Hu 475bb3c69a tracing: Fix kmemleak in tracing_map_array_free() ...

kmemleak reported the below leak when I was doing clear of the hist
trigger. With this patch, the kmeamleak is gone.

unreferenced object 0xffff94322b63d760 (size 32):
  comm "bash", pid 1522, jiffies 4403687962 (age 2442.311s)
  hex dump (first 32 bytes):
    00 01 00 00 04 00 00 00 08 00 00 00 ff 00 00 00  ................
    10 00 00 00 00 00 00 00 80 a8 7a f2 31 94 ff ff  ..........z.1...
  backtrace:
    [<ffffffff9e96c27a>] kmemleak_alloc+0x4a/0xa0
    [<ffffffff9e424cba>] kmem_cache_alloc_trace+0xca/0x1d0
    [<ffffffff9e377736>] tracing_map_array_alloc+0x26/0x140
    [<ffffffff9e261be0>] kretprobe_trampoline+0x0/0x50
    [<ffffffff9e38b935>] create_hist_data+0x535/0x750
    [<ffffffff9e38bd47>] event_hist_trigger_func+0x1f7/0x420
    [<ffffffff9e38893d>] event_trigger_write+0xfd/0x1a0
    [<ffffffff9e44dfc7>] __vfs_write+0x37/0x170
    [<ffffffff9e44f552>] vfs_write+0xb2/0x1b0
    [<ffffffff9e450b85>] SyS_write+0x55/0xc0
    [<ffffffff9e203857>] do_syscall_64+0x67/0x150
    [<ffffffff9e977ce7>] return_from_SYSCALL_64+0x0/0x6a
    [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff9431f27aa880 (size 128):
  comm "bash", pid 1522, jiffies 4403687962 (age 2442.311s)
  hex dump (first 32 bytes):
    00 00 8c 2a 32 94 ff ff 00 f0 8b 2a 32 94 ff ff  ...*2......*2...
    00 e0 8b 2a 32 94 ff ff 00 d0 8b 2a 32 94 ff ff  ...*2......*2...
  backtrace:
    [<ffffffff9e96c27a>] kmemleak_alloc+0x4a/0xa0
    [<ffffffff9e425348>] __kmalloc+0xe8/0x220
    [<ffffffff9e3777c1>] tracing_map_array_alloc+0xb1/0x140
    [<ffffffff9e261be0>] kretprobe_trampoline+0x0/0x50
    [<ffffffff9e38b935>] create_hist_data+0x535/0x750
    [<ffffffff9e38bd47>] event_hist_trigger_func+0x1f7/0x420
    [<ffffffff9e38893d>] event_trigger_write+0xfd/0x1a0
    [<ffffffff9e44dfc7>] __vfs_write+0x37/0x170
    [<ffffffff9e44f552>] vfs_write+0xb2/0x1b0
    [<ffffffff9e450b85>] SyS_write+0x55/0xc0
    [<ffffffff9e203857>] do_syscall_64+0x67/0x150
    [<ffffffff9e977ce7>] return_from_SYSCALL_64+0x0/0x6a
    [<ffffffffffffffff>] 0xffffffffffffffff

Link: http://lkml.kernel.org/r/1502705898-27571-1-git-send-email-chuhu@redhat.com

Cc: stable@vger.kernel.org
Fixes: 08d43a5fa0 ("tracing: Add lock-free tracing_map")
Signed-off-by: Chunyu Hu <chuhu@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

2017-08-24 10:05:51 -04:00

..

blktrace.c

block: switch bios to blk_status_t

2017-06-09 09:27:32 -06:00

bpf_trace.c

bpf: extend bpf_trace_printk to support %i

2017-07-03 02:22:52 -07:00

ftrace.c

ftrace: Check for null ret_stack on profile function graph entry function

2017-08-24 10:04:01 -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/filter: Define op as the enum that it is

2016-11-14 16:42:59 -05:00

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: Add support for recording tgid of tasks

2017-06-27 13:30:28 -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

Merge tag 'trace-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

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

sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>

2017-03-02 08:42:27 +01:00

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

ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU

2017-08-02 14:23:02 -04:00

trace.h

trace: fix the errors caused by incompatible type of RCU variables

2017-07-20 09:27:29 -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