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authorLinus Torvalds <torvalds@linux-foundation.org>2016-08-03 12:50:06 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-03 12:50:06 -0400
commitbf0f500bd0199aab613eb0ecb3412edd5472740d (patch)
treef9ef3d5177a177c05549560fb3ac7ef1a66ea949
parent4b2e0162e4ab1a976eec0a36ca0bd920b02bfff3 (diff)
parent7522c03ae307e657114ff909aec650304371a134 (diff)
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
-rw-r--r--Makefile1
-rw-r--r--kernel/trace/Makefile4
-rw-r--r--kernel/trace/trace_events_hist.c14
-rw-r--r--scripts/recordmcount.c9
4 files changed, 19 insertions, 9 deletions
diff --git a/Makefile b/Makefile
index d6d401bf9d95..182a84d0b8ea 100644
--- a/Makefile
+++ b/Makefile
@@ -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
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 979e7bfbde7a..d0a1617b52b4 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -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
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 0c05b8a99806..f3a960ed75a1 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -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);
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c
index e167592793a7..42396a74405d 100644
--- a/scripts/recordmcount.c
+++ b/scripts/recordmcount.c
@@ -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

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