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Luis Henriques f9797c2f20 ftrace: Fix memory leak in ftrace_graph_release() 
ftrace_hash is being kfree'ed in ftrace_graph_release(), however the
->buckets field is not.  This results in a memory leak that is easily
captured by kmemleak:

unreferenced object 0xffff880038afe000 (size 8192):
  comm "trace-cmd", pid 238, jiffies 4294916898 (age 9.736s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff815f561e>] kmemleak_alloc+0x4e/0xb0
    [<ffffffff8113964d>] __kmalloc+0x12d/0x1a0
    [<ffffffff810bf6d1>] alloc_ftrace_hash+0x51/0x80
    [<ffffffff810c0523>] __ftrace_graph_open.isra.39.constprop.46+0xa3/0x100
    [<ffffffff810c05e8>] ftrace_graph_open+0x68/0xa0
    [<ffffffff8114003d>] do_dentry_open.isra.1+0x1bd/0x2d0
    [<ffffffff81140df7>] vfs_open+0x47/0x60
    [<ffffffff81150f95>] path_openat+0x2a5/0x1020
    [<ffffffff81152d6a>] do_filp_open+0x8a/0xf0
    [<ffffffff811411df>] do_sys_open+0x12f/0x200
    [<ffffffff811412ce>] SyS_open+0x1e/0x20
    [<ffffffff815fa6e0>] entry_SYSCALL_64_fastpath+0x13/0x94
    [<ffffffffffffffff>] 0xffffffffffffffff

Link: http://lkml.kernel.org/r/20170525152038.7661-1-lhenriques@suse.com

Cc: stable@vger.kernel.org
Fixes: b9b0c831be ("ftrace: Convert graph filter to use hash tables")
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
 		2017-05-26 22:35:48 -04:00
..
Kconfig New features for this release: 2017-05-03 18:41:21 -07:00
Makefile perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS 2017-03-01 10:26:39 +01:00
blktrace.c blktrace: fix integer parse 2017-05-19 09:21:15 -06:00
bpf_trace.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-05-02 16:40:27 -07:00
ftrace.c ftrace: Fix memory leak in ftrace_graph_release() 2017-05-26 22:35:48 -04:00
power-traces.c
…
ring_buffer.c New features for this release: 2017-05-03 18:41:21 -07:00
ring_buffer_benchmark.c ring-buffer: Return reader page back into existing ring buffer 2017-05-01 10:26:40 -04:00
rpm-traces.c
…
trace.c tracing: Make sure RCU is watching before calling a stack trace 2017-05-18 23:57:56 -04:00
trace.h ftrace: Remove #ifdef from code and add clear_ftrace_function_probes() stub 2017-05-17 21:53:32 -04:00
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
…
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
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trace_events.c tracing/ftrace: Add a better way to pass data via the probe functions 2017-04-20 22:06:46 -04:00
trace_events_filter.c
…
trace_events_filter_test.h
…
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_export.c
…
trace_functions.c tracing/ftrace: Allow for instances to trigger their own stacktrace probes 2017-04-20 22:06:49 -04:00
trace_functions_graph.c
…
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
…
trace_kprobe.c tracing/kprobes: Enforce kprobes teardown after testing 2017-05-17 21:50:27 -04:00
trace_mmiotrace.c
…
trace_nop.c
…
trace_output.c trace: make trace_hwlat timestamp y2038 safe 2017-05-08 17:15:15 -07:00
trace_output.h
…
trace_printk.c
…
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
…
trace_sched_wakeup.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
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_selftest_dynamic.c
…
trace_seq.c
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trace_stack.c rcu/tracing: Add rcu_disabled to denote when rcu_irq_enter() will not work 2017-04-10 15:22:03 -04:00
trace_stat.c
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trace_stat.h
…
trace_syscalls.c
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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
tracing_map.c
…
tracing_map.h
…