3.8-stable patches

added patches:
	tracing-fix-possible-null-pointer-dereferences.patch

diff --git a/queue-3.8/series b/queue-3.8/series
index 23d608517390461045d3e73c9103004fb9eea7a8..8397448a38021d2434f7df321a78d2f4588584d6 100644 (file)
--- a/queue-3.8/series
+++ b/queue-3.8/series
@@ -18,3 +18,4 @@ vfs-revert-spurious-fix-to-spinning-prevention-in-prune_icache_sb.patch
 kobject-fix-kset_find_obj-race-with-concurrent-last-kobject_put.patch
 gpio-fix-wrong-checking-condition-for-gpio-range.patch
 x86-32-fix-possible-incomplete-tlb-invalidate-with-pae-pagetables.patch
+tracing-fix-possible-null-pointer-dereferences.patch

diff --git a/queue-3.8/tracing-fix-possible-null-pointer-dereferences.patch b/queue-3.8/tracing-fix-possible-null-pointer-dereferences.patch
new file mode 100644 (file)
index 0000000..73e399f
--- /dev/null
+++ b/queue-3.8/tracing-fix-possible-null-pointer-dereferences.patch
@@ -0,0 +1,108 @@
+From 6a76f8c0ab19f215af2a3442870eeb5f0e81998d Mon Sep 17 00:00:00 2001
+From: Namhyung Kim <namhyung.kim@lge.com>
+Date: Thu, 11 Apr 2013 15:55:01 +0900
+Subject: tracing: Fix possible NULL pointer dereferences
+
+From: Namhyung Kim <namhyung.kim@lge.com>
+
+commit 6a76f8c0ab19f215af2a3442870eeb5f0e81998d upstream.
+
+Currently set_ftrace_pid and set_graph_function files use seq_lseek
+for their fops.  However seq_open() is called only for FMODE_READ in
+the fops->open() so that if an user tries to seek one of those file
+when she open it for writing, it sees NULL seq_file and then panic.
+
+It can be easily reproduced with following command:
+
+  $ cd /sys/kernel/debug/tracing
+  $ echo 1234 | sudo tee -a set_ftrace_pid
+
+In this example, GNU coreutils' tee opens the file with fopen(, "a")
+and then the fopen() internally calls lseek().
+
+Link: http://lkml.kernel.org/r/1365663302-2170-1-git-send-email-namhyung@kernel.org
+
+Signed-off-by: Namhyung Kim <namhyung@kernel.org>
+Cc: Frederic Weisbecker <fweisbec@gmail.com>
+Cc: Ingo Molnar <mingo@kernel.org>
+Cc: Namhyung Kim <namhyung.kim@lge.com>
+Cc: stable@vger.kernel.org
+Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ include/linux/ftrace.h     |    2 +-
+ kernel/trace/ftrace.c      |   10 +++++-----
+ kernel/trace/trace_stack.c |    2 +-
+ 3 files changed, 7 insertions(+), 7 deletions(-)
+
+--- a/include/linux/ftrace.h
++++ b/include/linux/ftrace.h
+@@ -394,7 +394,7 @@ ssize_t ftrace_filter_write(struct file
+                           size_t cnt, loff_t *ppos);
+ ssize_t ftrace_notrace_write(struct file *file, const char __user *ubuf,
+                            size_t cnt, loff_t *ppos);
+-loff_t ftrace_regex_lseek(struct file *file, loff_t offset, int whence);
++loff_t ftrace_filter_lseek(struct file *file, loff_t offset, int whence);
+ int ftrace_regex_release(struct inode *inode, struct file *file);
+ 
+ void __init
+--- a/kernel/trace/ftrace.c
++++ b/kernel/trace/ftrace.c
+@@ -2674,7 +2674,7 @@ ftrace_notrace_open(struct inode *inode,
+ }
+ 
+ loff_t
+-ftrace_regex_lseek(struct file *file, loff_t offset, int whence)
++ftrace_filter_lseek(struct file *file, loff_t offset, int whence)
+ {
+       loff_t ret;
+ 
+@@ -3548,7 +3548,7 @@ static const struct file_operations ftra
+       .open = ftrace_filter_open,
+       .read = seq_read,
+       .write = ftrace_filter_write,
+-      .llseek = ftrace_regex_lseek,
++      .llseek = ftrace_filter_lseek,
+       .release = ftrace_regex_release,
+ };
+ 
+@@ -3556,7 +3556,7 @@ static const struct file_operations ftra
+       .open = ftrace_notrace_open,
+       .read = seq_read,
+       .write = ftrace_notrace_write,
+-      .llseek = ftrace_regex_lseek,
++      .llseek = ftrace_filter_lseek,
+       .release = ftrace_regex_release,
+ };
+ 
+@@ -3761,8 +3761,8 @@ static const struct file_operations ftra
+       .open           = ftrace_graph_open,
+       .read           = seq_read,
+       .write          = ftrace_graph_write,
++      .llseek         = ftrace_filter_lseek,
+       .release        = ftrace_graph_release,
+-      .llseek         = seq_lseek,
+ };
+ #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+ 
+@@ -4420,7 +4420,7 @@ static const struct file_operations ftra
+       .open           = ftrace_pid_open,
+       .write          = ftrace_pid_write,
+       .read           = seq_read,
+-      .llseek         = seq_lseek,
++      .llseek         = ftrace_filter_lseek,
+       .release        = ftrace_pid_release,
+ };
+ 
+--- a/kernel/trace/trace_stack.c
++++ b/kernel/trace/trace_stack.c
+@@ -322,7 +322,7 @@ static const struct file_operations stac
+       .open = stack_trace_filter_open,
+       .read = seq_read,
+       .write = ftrace_filter_write,
+-      .llseek = ftrace_regex_lseek,
++      .llseek = ftrace_filter_lseek,
+       .release = ftrace_regex_release,
+ };
+