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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-10-04 19:04:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-10 10:23:59 +0100 |
| commit | fab99223d0481eb126645e74406475685f4d7d30 (patch) | |
| tree | 78f5345a8f827e57d086704c06e54dc7c96a4203 /fs/ceph | |
| parent | 1c01388c5e29221fd43bb915a2b98fc08f341adf (diff) | |
| download | linux-rt-fab99223d0481eb126645e74406475685f4d7d30.tar.gz | |
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: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/addr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 7b79a54a2789..36aa6d8cdff7 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1392,7 +1392,7 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, 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, ret; sigset_t oldset; |