Messages in this thread Patch in this message | | | From | "Matthew Wilcox (Oracle)" <> | Subject | [PATCH 3/7] ceph: Promote to unsigned long long before shifting | Date | Sun, 4 Oct 2020 19:04:24 +0100 |
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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> --- fs/ceph/addr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 6ea761c84494..970e5a094035 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1522,7 +1522,7 @@ 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; -- 2.28.0
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