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authorMatthew Wilcox (Oracle) <willy@infradead.org>2020-10-04 19:04:24 +0100
committerIlya Dryomov <idryomov@gmail.com>2020-10-12 15:29:27 +0200
commitc403c3a2fbe24d4ed33e10cabad048583ebd4edf (patch)
tree1d22520413acdff139a005d4098e9afb7bffd0fd /fs/ceph
parent7edf1ec5b249cb7f9b85b7257f638026fd1a5d2b (diff)
ceph: promote to unsigned long long before shifting
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>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/addr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 137c0a5a2a0d..35c83f65475b 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1471,7 +1471,7 @@ 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;