Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7b249bdc authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'xfs-4.12-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux 

Pull xfs fixes from Darrick Wong:
 "I have one more bugfix for you for 4.12-rc7 to fix a disk corruption
  problem:

   - don't allow swapon on files on the realtime device, because the
     swap code will swap pages out to blocks on the data device, thereby
     corrupting the filesystem"

* tag 'xfs-4.12-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: don't allow bmap on rt files
parents a38371cb eb5e248d

fs/xfs/xfs_aops.c

+5 −2
Original line number Diff line number Diff line
@@ -1316,9 +1316,12 @@ xfs_vm_bmap( 
	 * The swap code (ab-)uses ->bmap to get a block mapping and then

	 * bypasseѕ the file system for actual I/O.  We really can't allow

	 * that on reflinks inodes, so we have to skip out here.  And yes,

	 * 0 is the magic code for a bmap error..

	 * 0 is the magic code for a bmap error.

	 *

	 * Since we don't pass back blockdev info, we can't return bmap

	 * information for rt files either.

	 */

	if (xfs_is_reflink_inode(ip))

	if (xfs_is_reflink_inode(ip) || XFS_IS_REALTIME_INODE(ip))

		return 0;



	filemap_write_and_wait(mapping);