diff options
| -rw-r--r-- | net/ceph/messenger.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 98ea28dc03f9..68acf94fae72 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -588,9 +588,15 @@ static int ceph_tcp_sendpage(struct socket *sock, struct page *page, int ret; struct kvec iov; - /* sendpage cannot properly handle pages with page_count == 0, - * we need to fallback to sendmsg if that's the case */ - if (page_count(page) >= 1) + /* + * sendpage cannot properly handle pages with page_count == 0, + * we need to fall back to sendmsg if that's the case. + * + * Same goes for slab pages: skb_can_coalesce() allows + * coalescing neighboring slab objects into a single frag which + * triggers one of hardened usercopy checks. + */ + if (page_count(page) >= 1 && !PageSlab(page)) return __ceph_tcp_sendpage(sock, page, offset, size, more); iov.iov_base = kmap(page) + offset; |