Commit 641089c1 authored Oct 31, 2016 by Miklos Szeredi

ovl: fsync after copy-up



Make sure the copied up file hits the disk before renaming to the final
destination.  If this is not done then the copy-up may corrupt the data in
the file in case of a crash.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org>

parent b93d4a0e

fs/overlayfs/copy_up.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -178,6 +178,8 @@ static int ovl_copy_up_data(struct path old, struct path new, loff_t len)
		len -= bytes;
		}

		if (!error)
		error = vfs_fsync(new_file, 0);
		fput(new_file);
		out_fput:
		fput(old_file);