From owner-svn-src-head@freebsd.org Wed Oct 23 18:00:23 2019 Return-Path: Delivered-To: svn-src-head@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 0CC2A15A1BD; Wed, 23 Oct 2019 18:00:23 +0000 (UTC) (envelope-from markj@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 46yypG6c3Dz4VGF; Wed, 23 Oct 2019 18:00:22 +0000 (UTC) (envelope-from markj@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 C54E83B5; Wed, 23 Oct 2019 18:00:22 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x9NI0M7Z079308; Wed, 23 Oct 2019 18:00:22 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x9NI0Mb7079307; Wed, 23 Oct 2019 18:00:22 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201910231800.x9NI0Mb7079307@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Wed, 23 Oct 2019 18:00:22 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r353957 - head/sys/vm X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/sys/vm X-SVN-Commit-Revision: 353957 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: 2.1.29 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: Wed, 23 Oct 2019 18:00:23 -0000 Author: markj Date: Wed Oct 23 18:00:22 2019 New Revision: 353957 URL: https://svnweb.freebsd.org/changeset/base/353957 Log: Check for bogus_page in vnode_pager_generic_getpages_done(). We now assert that a page is busy when updating its validity-tracking state, but bogus_page is not busied during a getpages operation. Reported by: syzkaller Reviewed by: alc, kib Discussed with: jeff MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D22124 Modified: head/sys/vm/vnode_pager.c Modified: head/sys/vm/vnode_pager.c ============================================================================== --- head/sys/vm/vnode_pager.c Wed Oct 23 17:58:19 2019 (r353956) +++ head/sys/vm/vnode_pager.c Wed Oct 23 18:00:22 2019 (r353957) @@ -1149,6 +1149,8 @@ vnode_pager_generic_getpages_done(struct buf *bp) nextoff = tfoff + PAGE_SIZE; mt = bp->b_pages[i]; + if (mt == bogus_page) + continue; if (nextoff <= object->un_pager.vnp.vnp_size) { /*