From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Sun, 4 Oct 2020 19:04:24 +0100
Subject: ceph: promote to unsigned long long before shifting
Git-commit: c403c3a2fbe24d4ed33e10cabad048583ebd4edf
Patch-mainline: v5.10-rc1
References: bsc#1178187

On 32-bit systems, this shift will overflow for files larger than 4GB.

Cc: stable@vger.kernel.org
Fixes: 61f68816211e ("ceph: check caps in filemap_fault and page_mkwrite")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.com>
---
 fs/ceph/addr.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1452,7 +1452,7 @@ static int ceph_filemap_fault(struct vm_
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	struct ceph_file_info *fi = vma->vm_file->private_data;
 	struct page *pinned_page = NULL;
-	loff_t off = vmf->pgoff << PAGE_SHIFT;
+	loff_t off = (loff_t)vmf->pgoff << PAGE_SHIFT;
 	int want, got, ret;
 	sigset_t oldset;