sysfs patch

1 files changed, 27 insertions, 0 deletions

diff --git a/driver/sysfs-off-by-one.patch b/driver/sysfs-off-by-one.patch
new file mode 100644
index 0000000000000..3e9949f4b851c
--- /dev/null
+++ b/driver/sysfs-off-by-one.patch
@@ -0,0 +1,27 @@
+From foo@baz Tue Apr  9 12:12:43 2002
+Date: Fri, 31 Mar 2006 15:37:06 -0800
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Subject: sysfs: zero terminate sysfs write buffers
+
+No one should be writing a PAGE_SIZE worth of data to a normal sysfs
+file, so properly terminate the buffer.
+
+Thanks to Al Viro for pointing out my stupidity here.
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+---
+ fs/sysfs/file.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- gregkh-2.6.orig/fs/sysfs/file.c
++++ gregkh-2.6/fs/sysfs/file.c
+@@ -192,7 +192,7 @@ fill_write_buffer(struct sysfs_buffer * 
+ 		return -ENOMEM;
+ 
+ 	if (count >= PAGE_SIZE)
+-		count = PAGE_SIZE;
++		count = PAGE_SIZE - 1;
+ 	error = copy_from_user(buffer->page,buf,count);
+ 	buffer->needs_read_fill = 1;
+ 	return error ? -EFAULT : count;