diff mbox series

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

Message ID 20181019153018.32507-1-olga.kornievskaia@gmail.com (mailing list archive)
State New, archived
Headers show
Series [v1,01/11] fs: Don't copy beyond the end of the file | expand

Commit Message

Olga Kornievskaia Oct. 19, 2018, 3:30 p.m. UTC 
From: Anna Schumaker <Anna.Schumaker@Netapp.com>

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

Patch

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))