Commit 4f3b78e2 authored Oct 04, 2020 by Matthew Wilcox (Oracle) Committed by Greg Kroah-Hartman Nov 05, 2020

ceph: promote to unsigned long long before shifting



commit c403c3a2fbe24d4ed33e10cabad048583ebd4edf upstream.

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

Cc: stable@vger.kernel.org
Fixes: 61f68816 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 0ac2a7bc

fs/ceph/addr.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1437,7 +1437,7 @@ static vm_fault_t ceph_filemap_fault(struct vm_fault *vmf)
		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, err;
		sigset_t oldset;
		vm_fault_t ret = VM_FAULT_SIGBUS;