1 files changed, 4 insertions, 0 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index 1b05f75aea0f..2f7b7783bd6b 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1687,6 +1687,10 @@ static ssize_t do_generic_file_read(struct file *filp, loff_t *ppos,
         unsigned int prev_offset;
         int error = 0;
 
+        if (unlikely(*ppos >= inode->i_sb->s_maxbytes))
+                return -EINVAL;
+        iov_iter_truncate(iter, inode->i_sb->s_maxbytes);
+
         index = *ppos >> PAGE_SHIFT;
         prev_index = ra->prev_pos >> PAGE_SHIFT;
         prev_offset = ra->prev_pos & (PAGE_SIZE-1);