From: Matthew Wilcox (Oracle) <[email protected]> commit c403c3a2fbe24d4ed33e10cabad048583ebd4edf upstream.
On 32-bit systems, this shift will overflow for files larger than 4GB. Cc: [email protected] Fixes: 61f68816211e ("ceph: check caps in filemap_fault and page_mkwrite") Signed-off-by: Matthew Wilcox (Oracle) <[email protected]> Reviewed-by: Jeff Layton <[email protected]> Signed-off-by: Ilya Dryomov <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/ceph/addr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1243,7 +1243,7 @@ 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_CACHE_SHIFT; + loff_t off = (loff_t)vmf->pgoff << PAGE_CACHE_SHIFT; int want, got, ret; dout("filemap_fault %p %llx.%llx %llu~%zd trying to get caps\n",
