From owner-freebsd-bugs@freebsd.org Tue Nov 6 03:15:21 2018 Return-Path: Delivered-To: freebsd-bugs@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 35598112C85E for ; Tue, 6 Nov 2018 03:15:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 31B6688CF3 for ; Tue, 6 Nov 2018 03:15:20 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id EA53C112C85D; Tue, 6 Nov 2018 03:15:19 +0000 (UTC) Delivered-To: bugs@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 C8745112C85C for ; Tue, 6 Nov 2018 03:15:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 51B2C88CEF for ; Tue, 6 Nov 2018 03:15:19 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 82AFC6C92 for ; Tue, 6 Nov 2018 03:15:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id wA63FIhK069044 for ; Tue, 6 Nov 2018 03:15:18 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id wA63FIvk069043 for bugs@FreeBSD.org; Tue, 6 Nov 2018 03:15:18 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 195882] Local DoS from unprivileged user Date: Tue, 06 Nov 2018 03:15:17 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: rozhuk.im@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Rspamd-Queue-Id: 31B6688CF3 X-Spamd-Result: default: False [-105.32 / 200.00]; FORGED_RECIPIENTS_FORWARDING(0.00)[]; ALLOW_DOMAIN_WHITELIST(-100.00)[freebsd.org]; FORWARDED(0.00)[bugs@mailman.ysv.freebsd.org]; SPF_FAIL_FORWARDING(0.00)[]; TO_DN_NONE(0.00)[]; HAS_XAW(0.00)[]; R_SPF_SOFTFAIL(0.00)[~all]; XAW_SERVICE_ACCT(1.00)[]; RCVD_IN_DNSWL_MED(-0.20)[5.0.0.0.0.5.0.0.0.0.0.0.0.0.0.0.a.6.0.2.4.5.2.2.0.0.9.1.1.0.0.2.list.dnswl.org : 127.0.9.2]; MX_GOOD(-0.01)[cached: mx66.freebsd.org]; NEURAL_HAM_SHORT(-1.00)[-1.000,0]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; IP_SCORE(-3.11)[ip: (-9.27), ipnet: 2001:1900:2254::/48(-3.60), asn: 10310(-2.60), country: US(-0.07)]; ASN(0.00)[asn:10310, ipnet:2001:1900:2254::/48, country:US]; FORGED_RECIPIENTS(0.00)[bugs@FreeBSD.org,freebsd-bugs@freebsd.org]; TO_DOM_EQ_FROM_DOM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; FROM_NO_DN(0.00)[]; RCVD_COUNT_SEVEN(0.00)[7] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Nov 2018 03:15:21 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D195882 --- Comment #8 from rozhuk.im@gmail.com --- (In reply to Mark Johnston from comment #7) Main problem is that dirty pages does not go to free after if flushed to di= sk, and it cause swap usage. On 10.1 - system can not allocate mem even after system stop write to disk. Probably now I should count free mem as: free + laundry. Another bug: I have 6,5 Gb free, program write 6 Gb, rename file and restart program. Program fail some time later, but system can not flush pages to di= sk - no space, and whole time move mem: ... CPU: 0.0% user, 0.0% nice, 10.5% system, 7.0% interrupt, 82.5% idle Mem: 1945M Active, 120K Inact, 1537M Laundry, 315M Wired, 199M Buf, 47M Free ... CPU: 0.0% user, 0.0% nice, 14.3% system, 6.3% interrupt, 79.5% idle Mem: 2765M Active, 36K Inact, 717M Laundry, 315M Wired, 199M Buf, 48M Free 16 root 49 - 0 72K CPU3 3 12:26 59.96% [pagedaemon{laundry: dom0}] ... and eat CPU. Until file was deleted. About kernel dump. I try: swapoff -a swapoff: /dev/gptid/0714a812-b98e-11e8-a831-7085c2375722.eli: Cannot alloca= te memory System has 32 Gb RAM, 1,8 Gb in swap and summ of RES all running apps is le= ss than 20 Gb. Only after I stop one vbox vm and get 4+gb free mem it work without error. --=20 You are receiving this mail because: You are the assignee for the bug.=