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A few updates and fixes: 

. Move the suppressing of the __builtin_return_address >0 warning to the
    tracing directory only.
 
  . metag recordmcount fix for newer glibc's
 
  . Two tracing histogram fixes that were reported by KASAN
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Merge tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "A few updates and fixes:

   - move the suppressing of the __builtin_return_address >0 warning to
     the tracing directory only.

   - metag recordmcount fix for newer glibc's

   - two tracing histogram fixes that were reported by KASAN"

* tag 'trace-v4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix use-after-free in hist_register_trigger()
  tracing: Fix use-after-free in hist_unreg_all/hist_enable_unreg_all
  Makefile: Mute warning for __builtin_return_address(>0) for tracing only
  ftrace/recordmcount: Work around for addition of metag magic but not relocations
hifive-unleashed-5.1
Linus Torvalds 2016-08-03 12:50:06 -04:00
parent 4b2e0162e4 7522c03ae3
commit bf0f500bd0
4 changed files with 19 additions and 9 deletions
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1
Makefile
View File

@ -621,7 +621,6 @@ include arch/$(SRCARCH)/Makefile
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os

4
kernel/trace/Makefile
View File

@ -1,4 +1,8 @@
# We are fully aware of the dangers of __builtin_return_address()
FRAME_CFLAGS := $(call cc-disable-warning,frame-address)
KBUILD_CFLAGS += $(FRAME_CFLAGS)
# Do not instrument the tracer itself:
ifdef CONFIG_FUNCTION_TRACER

14
kernel/trace/trace_events_hist.c
View File

@ -1441,6 +1441,9 @@ static int hist_register_trigger(char *glob, struct event_trigger_ops *ops,
goto out;
}
if (hist_data->attrs->pause)
data->paused = true;
if (named_data) {
destroy_hist_data(data->private_data);
data->private_data = named_data->private_data;
@ -1448,9 +1451,6 @@ static int hist_register_trigger(char *glob, struct event_trigger_ops *ops,
data->ops = &event_hist_trigger_named_ops;
}
if (hist_data->attrs->pause)
data->paused = true;
if (data->ops->init) {
ret = data->ops->init(data->ops, data);
if (ret < 0)
@ -1500,9 +1500,9 @@ static void hist_unregister_trigger(char *glob, struct event_trigger_ops *ops,
static void hist_unreg_all(struct trace_event_file *file)
{
struct event_trigger_data *test;
struct event_trigger_data *test, *n;
list_for_each_entry_rcu(test, &file->triggers, list) {
list_for_each_entry_safe(test, n, &file->triggers, list) {
if (test->cmd_ops->trigger_type == ETT_EVENT_HIST) {
list_del_rcu(&test->list);
trace_event_trigger_enable_disable(file, 0);
@ -1699,9 +1699,9 @@ hist_enable_get_trigger_ops(char *cmd, char *param)
static void hist_enable_unreg_all(struct trace_event_file *file)
{
struct event_trigger_data *test;
struct event_trigger_data *test, *n;
list_for_each_entry_rcu(test, &file->triggers, list) {
list_for_each_entry_safe(test, n, &file->triggers, list) {
if (test->cmd_ops->trigger_type == ETT_HIST_ENABLE) {
list_del_rcu(&test->list);
update_cond_flag(file);

9
scripts/recordmcount.c
View File

@ -33,10 +33,17 @@
#include <string.h>
#include <unistd.h>
/*
* glibc synced up and added the metag number but didn't add the relocations.
* Work around this in a crude manner for now.
*/
#ifndef EM_METAG
/* Remove this when these make it to the standard system elf.h. */
#define EM_METAG 174
#endif
#ifndef R_METAG_ADDR32
#define R_METAG_ADDR32 2
#endif
#ifndef R_METAG_NONE
#define R_METAG_NONE 3
#endif