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Message-ID: <20090926122354.GA8324@elte.hu>
Date: Sat, 26 Sep 2009 14:23:54 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
Frédéric Weisbecker
<fweisbec@...il.com>
Subject: [GIT PULL] tracing fixes
Linus,
Please pull the latest tracing-fixes-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git tracing-fixes-for-linus
Thanks,
Ingo
------------------>
Anton Blanchard (1):
tracing/workqueue: Use %pf in workqueue trace events
Ingo Molnar (1):
modules, tracing: Remove stale struct marker signature from module_layout()
Li Hong (1):
tracing: Fix a comment and a trivial format issue in tracepoint.h
Li Zefan (4):
tracing: Fix off-by-one in trace_get_user()
tracing: Check the return value of trace_get_user()
tracing: Fix failure path in ftrace_graph_write()
tracing: Fix failure path in ftrace_regex_open()
include/linux/tracepoint.h | 4 ++--
include/trace/events/workqueue.h | 4 ++--
kernel/module.c | 1 -
kernel/trace/ftrace.c | 23 +++++++++++++----------
kernel/trace/trace.c | 2 +-
kernel/trace/trace_events.c | 7 +++----
6 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 63a3f7a..2aac8a8 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -4,7 +4,7 @@
/*
* Kernel Tracepoint API.
*
- * See Documentation/tracepoint.txt.
+ * See Documentation/trace/tracepoints.txt.
*
* (C) Copyright 2008 Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
*
@@ -36,7 +36,7 @@ struct tracepoint {
#ifndef DECLARE_TRACE
#define TP_PROTO(args...) args
-#define TP_ARGS(args...) args
+#define TP_ARGS(args...) args
#ifdef CONFIG_TRACEPOINTS
diff --git a/include/trace/events/workqueue.h b/include/trace/events/workqueue.h
index fcfd9a1..e4612db 100644
--- a/include/trace/events/workqueue.h
+++ b/include/trace/events/workqueue.h
@@ -26,7 +26,7 @@ TRACE_EVENT(workqueue_insertion,
__entry->func = work->func;
),
- TP_printk("thread=%s:%d func=%pF", __entry->thread_comm,
+ TP_printk("thread=%s:%d func=%pf", __entry->thread_comm,
__entry->thread_pid, __entry->func)
);
@@ -48,7 +48,7 @@ TRACE_EVENT(workqueue_execution,
__entry->func = work->func;
),
- TP_printk("thread=%s:%d func=%pF", __entry->thread_comm,
+ TP_printk("thread=%s:%d func=%pf", __entry->thread_comm,
__entry->thread_pid, __entry->func)
);
diff --git a/kernel/module.c b/kernel/module.c
index b6ee424..392eb3d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2947,7 +2947,6 @@ void module_layout(struct module *mod,
struct modversion_info *ver,
struct kernel_param *kp,
struct kernel_symbol *ks,
- struct marker *marker,
struct tracepoint *tp)
{
}
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index c71e91b..e70af98 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1621,8 +1621,10 @@ ftrace_regex_open(struct inode *inode, struct file *file, int enable)
if (!ret) {
struct seq_file *m = file->private_data;
m->private = iter;
- } else
+ } else {
+ trace_parser_put(&iter->parser);
kfree(iter);
+ }
} else
file->private_data = iter;
mutex_unlock(&ftrace_regex_lock);
@@ -2202,7 +2204,7 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
struct trace_parser *parser;
ssize_t ret, read;
- if (!cnt || cnt < 0)
+ if (!cnt)
return 0;
mutex_lock(&ftrace_regex_lock);
@@ -2216,7 +2218,7 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
parser = &iter->parser;
read = trace_get_user(parser, ubuf, cnt, ppos);
- if (trace_parser_loaded(parser) &&
+ if (read >= 0 && trace_parser_loaded(parser) &&
!trace_parser_cont(parser)) {
ret = ftrace_process_regex(parser->buffer,
parser->idx, enable);
@@ -2552,8 +2554,7 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct trace_parser parser;
- size_t read = 0;
- ssize_t ret;
+ ssize_t read, ret;
if (!cnt || cnt < 0)
return 0;
@@ -2562,29 +2563,31 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
if (ftrace_graph_count >= FTRACE_GRAPH_MAX_FUNCS) {
ret = -EBUSY;
- goto out;
+ goto out_unlock;
}
if (trace_parser_get_init(&parser, FTRACE_BUFF_MAX)) {
ret = -ENOMEM;
- goto out;
+ goto out_unlock;
}
read = trace_get_user(&parser, ubuf, cnt, ppos);
- if (trace_parser_loaded((&parser))) {
+ if (read >= 0 && trace_parser_loaded((&parser))) {
parser.buffer[parser.idx] = 0;
/* we allow only one expression at a time */
ret = ftrace_set_func(ftrace_graph_funcs, &ftrace_graph_count,
parser.buffer);
if (ret)
- goto out;
+ goto out_free;
}
ret = read;
- out:
+
+out_free:
trace_parser_put(&parser);
+out_unlock:
mutex_unlock(&graph_lock);
return ret;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a35925d..ae17453 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -415,7 +415,7 @@ int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
/* read the non-space input */
while (cnt && !isspace(ch)) {
- if (parser->idx < parser->size)
+ if (parser->idx < parser->size - 1)
parser->buffer[parser->idx++] = ch;
else {
ret = -EINVAL;
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 6f03c8a..d128f65 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -232,10 +232,9 @@ ftrace_event_write(struct file *file, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct trace_parser parser;
- size_t read = 0;
- ssize_t ret;
+ ssize_t read, ret;
- if (!cnt || cnt < 0)
+ if (!cnt)
return 0;
ret = tracing_update_buffers();
@@ -247,7 +246,7 @@ ftrace_event_write(struct file *file, const char __user *ubuf,
read = trace_get_user(&parser, ubuf, cnt, ppos);
- if (trace_parser_loaded((&parser))) {
+ if (read >= 0 && trace_parser_loaded((&parser))) {
int set = 1;
if (*parser.buffer == '!')
--
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