github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-10 15:42:19 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph
2e0bc33ad7
linux/kernel/trace
History
Steven Rostedt (Red Hat) cba998b9b3 tracing: Fix leaks of filter preds 
commit 60705c8946 upstream.

Special preds are created when folding a series of preds that
can be done in serial. These are allocated in an ops field of
the pred structure. But they were never freed, causing memory
leaks.

This was discovered using the kmemleak checker:

unreferenced object 0xffff8800797fd5e0 (size 32):
  comm "swapper/0", pid 1, jiffies 4294690605 (age 104.608s)
  hex dump (first 32 bytes):
    00 00 01 00 03 00 05 00 07 00 09 00 0b 00 0d 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff814b52af>] kmemleak_alloc+0x73/0x98
    [<ffffffff8111ff84>] kmemleak_alloc_recursive.constprop.42+0x16/0x18
    [<ffffffff81120e68>] __kmalloc+0xd7/0x125
    [<ffffffff810d47eb>] kcalloc.constprop.24+0x2d/0x2f
    [<ffffffff810d4896>] fold_pred_tree_cb+0xa9/0xf4
    [<ffffffff810d3781>] walk_pred_tree+0x47/0xcc
    [<ffffffff810d5030>] replace_preds.isra.20+0x6f8/0x72f
    [<ffffffff810d50b5>] create_filter+0x4e/0x8b
    [<ffffffff81b1c30d>] ftrace_test_event_filter+0x5a/0x155
    [<ffffffff8100028d>] do_one_initcall+0xa0/0x137
    [<ffffffff81afbedf>] kernel_init_freeable+0x14d/0x1dc
    [<ffffffff814b24b7>] kernel_init+0xe/0xdb
    [<ffffffff814d539c>] ret_from_fork+0x7c/0xb0
    [<ffffffffffffffff>] 0xffffffffffffffff

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-19 10:54:40 -07:00
..
blktrace.c simple_open: automatically convert to simple_open() 2012-04-05 15:25:50 -07:00
ftrace.c tracing: Reset ftrace_graph_filter_enabled if count is zero 2013-05-07 19:51:54 -07:00
Kconfig ftrace: Update the kconfig for DYNAMIC_FTRACE 2013-03-14 11:29:51 -07:00
Makefile Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-26 17:03:38 +02:00
power-traces.c perf: Clean up power events by introducing new, more generic ones 2011-01-04 08:16:54 +01:00
ring_buffer_benchmark.c tracing: Use NUMA allocation for per-cpu ring buffer pages 2011-06-14 22:04:39 -04:00
ring_buffer.c ring-buffer: Fix race between integrity check and readers 2013-01-17 08:50:51 -08:00
rpm-traces.c PM / Runtime: Introduce trace points for tracing rpm_* functions 2011-09-27 22:53:27 +02:00
trace_branch.c tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace_clock.c tracing: Add a counter clock for those that do not trust clocks 2011-09-19 11:35:58 -04:00
trace_entries.h Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent 2012-03-24 08:19:09 +01:00
trace_event_perf.c ftrace, perf: Add filter support for function trace event 2012-02-21 11:08:30 -05:00
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: Fix leaks of filter preds 2013-05-19 10:54:40 -07:00
trace_events.c tracing: Do not enable function event with enable 2012-05-10 15:55:43 -04:00
trace_export.c tracing: Do not enable function event with enable 2012-05-10 15:55:43 -04:00
trace_functions_graph.c tracing: Still trace filtered irq functions when irq trace is disabled 2011-07-07 22:26:27 -04:00
trace_functions.c ftrace: Fix regression of :mod:module function enabling 2011-07-07 11:30:08 -04:00
trace_irqsoff.c tracing: Prevent buffer overwrite disabled for latency tracers 2013-04-05 10:04:37 -07:00
trace_kdb.c kdb,ftdump: Remove reference to internal kdb include 2010-10-22 15:34:11 -05:00
trace_kprobe.c ftrace, perf: Add add/del tracepoint perf registration actions 2012-02-21 11:08:25 -05:00
trace_mmiotrace.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c tracing: Fix stacktrace of latency tracers (irqsoff and friends) 2012-04-19 17:00:13 -04:00
trace_output.h tracing: Allow events to share their print functions 2010-05-14 14:20:32 -04:00
trace_printk.c tracing: Clean up tb_fmt to not give faulty compile warning 2011-08-10 20:36:32 -04:00
trace_sched_switch.c tracing: Remove obsolete sched_switch tracer 2011-02-08 17:14:56 -05:00
trace_sched_wakeup.c tracing: Prevent buffer overwrite disabled for latency tracers 2013-04-05 10:04:37 -07:00
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: Fix ftrace_dump() 2013-05-11 13:48:14 -07:00
trace_stack.c tracing: Check return value of tracing_init_dentry() 2013-05-07 19:51:54 -07:00
trace_stat.c tracing: Check return value of tracing_init_dentry() 2013-05-07 19:51:54 -07:00
trace_stat.h tracing/stat: Add stat_release() callback 2009-07-10 12:14:05 +02:00
trace_syscalls.c ftrace, perf: Add add/del tracepoint perf registration actions 2012-02-21 11:08:25 -05:00
trace_workqueue.c jump label: Initialize workqueue tracepoints *before* they are registered 2010-09-22 16:30:03 -04:00
trace.c tracing: Fix ftrace_dump() 2013-05-11 13:48:14 -07:00
trace.h tracing: Prevent buffer overwrite disabled for latency tracers 2013-04-05 10:04:37 -07:00