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ceph: promote to unsigned long long before shifting

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commit c403c3a2fb upstream.

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

Cc: stable@vger.kernel.org
Fixes: 61f6881621 ("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>
This commit is contained in:
Matthew Wilcox (Oracle)
2020-10-04 19:04:24 +01:00
committed by Greg Kroah-Hartman
parent 9cdccb4761
commit d4fdbedef7
1 changed files with 1 additions and 1 deletions
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fs/ceph/addr.c
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@@ -1427,7 +1427,7 @@ 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;