From owner-svn-src-stable-12@freebsd.org Sun Nov 24 12:30:42 2019 Return-Path: Delivered-To: svn-src-stable-12@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 712D91AE384; Sun, 24 Nov 2019 12:30:42 +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 TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47LTz62MT9z3ywT; Sun, 24 Nov 2019 12:30:42 +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 346A3242B5; Sun, 24 Nov 2019 12:30:42 +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 xAOCUgOP048155; Sun, 24 Nov 2019 12:30:42 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id xAOCUfNb048154; Sun, 24 Nov 2019 12:30:41 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201911241230.xAOCUfNb048154@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sun, 24 Nov 2019 12:30:41 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r355052 - in stable/12/sys: sys vm X-SVN-Group: stable-12 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: in stable/12/sys: sys vm X-SVN-Commit-Revision: 355052 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 24 Nov 2019 12:30:42 -0000 Author: kib Date: Sun Nov 24 12:30:41 2019 New Revision: 355052 URL: https://svnweb.freebsd.org/changeset/base/355052 Log: MFC r354790: Add elf image flag to disable stack gap. Modified: stable/12/sys/sys/elf_common.h stable/12/sys/vm/vm_map.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/sys/elf_common.h ============================================================================== --- stable/12/sys/sys/elf_common.h Sun Nov 24 12:27:13 2019 (r355051) +++ stable/12/sys/sys/elf_common.h Sun Nov 24 12:30:41 2019 (r355052) @@ -778,6 +778,7 @@ typedef struct { /* NT_FREEBSD_FEATURE_CTL desc[0] bits */ #define NT_FREEBSD_FCTL_ASLR_DISABLE 0x00000001 +#define NT_FREEBSD_FCTL_STKGAP_DISABLE 0x00000004 /* Values for n_type. Used in core files. */ #define NT_PRSTATUS 1 /* Process status. */ Modified: stable/12/sys/vm/vm_map.c ============================================================================== --- stable/12/sys/vm/vm_map.c Sun Nov 24 12:27:13 2019 (r355051) +++ stable/12/sys/vm/vm_map.c Sun Nov 24 12:30:41 2019 (r355052) @@ -69,6 +69,7 @@ __FBSDID("$FreeBSD$"); #include #include +#include #include #include #include @@ -4114,7 +4115,8 @@ vm_map_stack_locked(vm_map_t map, vm_offset_t addrbos, addrbos + max_ssize > vm_map_max(map) || addrbos + max_ssize <= addrbos) return (KERN_INVALID_ADDRESS); - sgp = (curproc->p_flag2 & P2_STKGAP_DISABLE) != 0 ? 0 : + sgp = ((curproc->p_flag2 & P2_STKGAP_DISABLE) != 0 || + (curproc->p_fctl0 & NT_FREEBSD_FCTL_STKGAP_DISABLE) != 0) ? 0 : (vm_size_t)stack_guard_page * PAGE_SIZE; if (sgp >= max_ssize) return (KERN_INVALID_ARGUMENT); @@ -4251,7 +4253,8 @@ retry: } else { return (KERN_FAILURE); } - guard = (curproc->p_flag2 & P2_STKGAP_DISABLE) != 0 ? 0 : + guard = ((curproc->p_flag2 & P2_STKGAP_DISABLE) != 0 || + (curproc->p_fctl0 & NT_FREEBSD_FCTL_STKGAP_DISABLE) != 0) ? 0 : gap_entry->next_read; max_grow = gap_entry->end - gap_entry->start; if (guard > max_grow)