From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Howells Subject: [PATCH 1/2] overlayfs: Conditionally use O_LARGEFILE in ovl_copy_up() Date: Fri, 18 Sep 2015 11:45:12 +0100 Message-ID: <20150918104512.7696.55992.stgit@warthog.procyon.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: miklos@szeredi.hu Cc: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, viro@ZenIV.linux.org.uk List-Id: linux-unionfs@vger.kernel.org Open the lower file with O_LARGEFILE in ovl_copy_up() if the lower file is >= 4GiB in size. Reported-by: Ulrich Obergfell Signed-off-by: David Howells --- fs/overlayfs/copy_up.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 84d693d37428..89b4cb3773d7 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -76,16 +76,19 @@ static int ovl_copy_up_data(struct path *old, struct path *new, loff_t len) struct file *new_file; loff_t old_pos = 0; loff_t new_pos = 0; - int error = 0; + int error = 0, o_flag = 0; if (len == 0) return 0; - old_file = ovl_path_open(old, O_RDONLY); + if (i_size_read(d_inode(old->dentry)) > MAX_NON_LFS) + o_flag |= O_LARGEFILE; + + old_file = ovl_path_open(old, o_flag | O_RDONLY); if (IS_ERR(old_file)) return PTR_ERR(old_file); - new_file = ovl_path_open(new, O_WRONLY); + new_file = ovl_path_open(new, o_flag | O_WRONLY); if (IS_ERR(new_file)) { error = PTR_ERR(new_file); goto out_fput;