[PATCH v1 01/11] fs: Don't copy beyond the end of the file

[Olga Kornievskaia <olga.kornievskaia@xxxxxxxxx>]

From: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>

Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
---
 fs/read_write.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/read_write.c b/fs/read_write.c
index 39b4a21..c60790f 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1570,6 +1570,9 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 	if (unlikely(ret))
 		return ret;
 
+	if (pos_in >= i_size_read(inode_in))
+		return -EINVAL;
+
 	if (!(file_in->f_mode & FMODE_READ) ||
 	    !(file_out->f_mode & FMODE_WRITE) ||
 	    (file_out->f_flags & O_APPEND))
-- 
1.8.3.1