1 files changed, 1 insertions, 1 deletions

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 830f76fa098c..f1cb1ddde511 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -183,7 +183,7 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t
                 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;