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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-10-04 19:04:24 +0100 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2020-10-12 15:29:27 +0200 |
| commit | c403c3a2fbe24d4ed33e10cabad048583ebd4edf (patch) | |
| tree | 1d22520413acdff139a005d4098e9afb7bffd0fd /fs/ceph | |
| parent | 7edf1ec5b249cb7f9b85b7257f638026fd1a5d2b (diff) | |
| download | linux-c403c3a2fbe24d4ed33e10cabad048583ebd4edf.tar.gz linux-c403c3a2fbe24d4ed33e10cabad048583ebd4edf.tar.bz2 linux-c403c3a2fbe24d4ed33e10cabad048583ebd4edf.zip | |
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.c | 2 |
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; |