From owner-svn-src-all@freebsd.org Tue Jun 25 07:44:38 2019 Return-Path: Delivered-To: svn-src-all@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 1A9C715C3A9B; Tue, 25 Jun 2019 07:44:38 +0000 (UTC) (envelope-from dougm@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 B50FB76459; Tue, 25 Jun 2019 07:44:37 +0000 (UTC) (envelope-from dougm@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 8EDFCD5F8; Tue, 25 Jun 2019 07:44:37 +0000 (UTC) (envelope-from dougm@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x5P7ibG0009950; Tue, 25 Jun 2019 07:44:37 GMT (envelope-from dougm@FreeBSD.org) Received: (from dougm@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x5P7ibLv009949; Tue, 25 Jun 2019 07:44:37 GMT (envelope-from dougm@FreeBSD.org) Message-Id: <201906250744.x5P7ibLv009949@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: dougm set sender to dougm@FreeBSD.org using -f From: Doug Moore Date: Tue, 25 Jun 2019 07:44:37 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r349363 - head/sys/vm X-SVN-Group: head X-SVN-Commit-Author: dougm X-SVN-Commit-Paths: head/sys/vm X-SVN-Commit-Revision: 349363 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: B50FB76459 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.961,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Jun 2019 07:44:38 -0000 Author: dougm Date: Tue Jun 25 07:44:37 2019 New Revision: 349363 URL: https://svnweb.freebsd.org/changeset/base/349363 Log: vm_map_protect may return an INVALID_ARGUMENT or PROTECTION_FAILURE error response after clipping the first map entry in the region to be reserved. This creates a pair of matching entries that should have been "simplified" back into one, or never created. This change defers the clipping of that entry until those two vm_map_protect failure cases have been ruled out. Reviewed by: alc Approved by: markj (mentor) Differential Revision: https://reviews.freebsd.org/D20711 Modified: head/sys/vm/vm_map.c Modified: head/sys/vm/vm_map.c ============================================================================== --- head/sys/vm/vm_map.c Tue Jun 25 07:04:47 2019 (r349362) +++ head/sys/vm/vm_map.c Tue Jun 25 07:44:37 2019 (r349363) @@ -2472,11 +2472,8 @@ again: VM_MAP_RANGE_CHECK(map, start, end); - if (vm_map_lookup_entry(map, start, &entry)) { - vm_map_clip_start(map, entry, start); - } else { + if (!vm_map_lookup_entry(map, start, &entry)) entry = entry->next; - } /* * Make a first pass to check for protection violations. @@ -2515,6 +2512,7 @@ again: * now will do cow due to allowed write (e.g. debugger sets * breakpoint on text segment) */ + vm_map_clip_start(map, entry, start); for (current = entry; current->start < end; current = current->next) { vm_map_clip_end(map, current, end);