From owner-svn-src-head@freebsd.org Fri Sep 28 14:11:02 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4322810B1CAE; Fri, 28 Sep 2018 14:11:02 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EBCF774BE0; Fri, 28 Sep 2018 14:11:01 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id E6BB516091; Fri, 28 Sep 2018 14:11:01 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w8SEB1gr077970; Fri, 28 Sep 2018 14:11:01 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w8SEB10J077969; Fri, 28 Sep 2018 14:11:01 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201809281411.w8SEB10J077969@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 28 Sep 2018 14:11:01 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r338998 - head/sys/vm X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/sys/vm X-SVN-Commit-Revision: 338998 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Sep 2018 14:11:02 -0000 Author: kib Date: Fri Sep 28 14:11:01 2018 New Revision: 338998 URL: https://svnweb.freebsd.org/changeset/base/338998 Log: In vm_fault_copy_entry(), we should not assert that entry is charged if the dst_object is not of swap type. It can only happen when entry does not require copy, otherwise vm_map_protect() already adds the charge. So the assert was right for the case where swap object was allocated in the vm_fault_copy_entry(), but not when it was just copied from src_entry and its type is not swap. Reported by: andrew using syzkaller Reviewed by: alc Sponsored by: The FreeBSD Foundation Approved by: re (gjb) MFC after: 1 week Differential revision: https://reviews.freebsd.org/D17323 Modified: head/sys/vm/vm_fault.c Modified: head/sys/vm/vm_fault.c ============================================================================== --- head/sys/vm/vm_fault.c Fri Sep 28 14:10:12 2018 (r338997) +++ head/sys/vm/vm_fault.c Fri Sep 28 14:11:01 2018 (r338998) @@ -1650,7 +1650,9 @@ vm_fault_copy_entry(vm_map_t dst_map, vm_map_t src_map dst_object->cred = curthread->td_ucred; crhold(dst_object->cred); *fork_charge += dst_object->charge; - } else if (dst_object->cred == NULL) { + } else if ((dst_object->type == OBJT_DEFAULT || + dst_object->type == OBJT_SWAP) && + dst_object->cred == NULL) { KASSERT(dst_entry->cred != NULL, ("no cred for entry %p", dst_entry)); dst_object->cred = dst_entry->cred;