From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CA6FC4646D for ; Mon, 6 Aug 2018 15:42:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC67321A38 for ; Mon, 6 Aug 2018 15:42:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BC67321A38 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732923AbeHFRvn (ORCPT ); Mon, 6 Aug 2018 13:51:43 -0400 Received: from mail-it0-f69.google.com ([209.85.214.69]:44376 "EHLO mail-it0-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732634AbeHFRvn (ORCPT ); Mon, 6 Aug 2018 13:51:43 -0400 Received: by mail-it0-f69.google.com with SMTP id b124-v6so7506207itb.9 for ; Mon, 06 Aug 2018 08:42:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=8zqBojeKMSVyNG0R/ErUslDZcOEdP6vn1j0f7GRHioQ=; b=kPe91QVP5YmYToMi8W+p+i1HwyToL6vXYD9zipiVI88Rsp80/1efGdkpVoMY5e2srm IUUS5BIz7b2eTVn7DUveluTbpnN+GH4Ib0HqVukrddbOgr/a+QW6tp1YUnqPmi4PUNsV ZLRYLZ7eiES8oIOoY11H3stn6a4emnMW1CvwRSU4gx2LkSJA/KTMrpZS03SvxQON43nB sSB/5zjUsf+znOwbgyHSpJO0mFydI/0y3kQcsF06dcMiSAWyuxeBWdXG//mZLMPQmSr4 1gZyt6uuqVlr1Kdp9+jHnnV9P4IfA2Ilf4JdFCS3dA/FeuWMunKL3xVwuOLyDRVV1K5W S6rA== X-Gm-Message-State: AOUpUlEQePKwvtIO/93owKeOxL1DtITmG8SkOHXEFQlIDRNYpQTOfiBu aD+MipE77MpPiHv3gTfcWDh9N/RssjERyos9h4wuJD3UEEaa X-Google-Smtp-Source: AA+uWPzcCEtuhdMuwCrzghNEgTs6/yi0/Io976KsTbqOEjHLlMv4MtWZfEHFE66ZLcSn9XgbmK+kLWoM6Ds9Ghy37SQ6JDKMlkSH MIME-Version: 1.0 X-Received: by 2002:a6b:e712:: with SMTP id b18-v6mr7869060ioh.77.1533570122466; Mon, 06 Aug 2018 08:42:02 -0700 (PDT) Date: Mon, 06 Aug 2018 08:42:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006350880572c61e62@google.com> Subject: Re: WARNING in try_charge From: syzbot To: cgroups@vger.kernel.org, dvyukov@google.com, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, penguin-kernel@I-love.SAKURA.ne.jp, syzkaller-bugs@googlegroups.com, vdavydov.dev@gmail.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer still triggered crash: WARNING in try_charge Killed process 6410 (syz-executor5) total-vm:37708kB, anon-rss:2128kB, file-rss:0kB, shmem-rss:0kB oom_reaper: reaped process 6410 (syz-executor5), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB task=syz-executor5 pid=6410 invoked memcg oom killer. oom_victim=1 ------------[ cut here ]------------ Memory cgroup charge failed because of no reclaimable memory! This looks like a misconfiguration or a kernel bug. WARNING: CPU: 1 PID: 6410 at mm/memcontrol.c:1707 mem_cgroup_oom mm/memcontrol.c:1706 [inline] WARNING: CPU: 1 PID: 6410 at mm/memcontrol.c:1707 try_charge+0x734/0x1680 mm/memcontrol.c:2264 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6410 Comm: syz-executor5 Not tainted 4.18.0-rc7-next-20180803+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996 RIP: 0010:mem_cgroup_oom mm/memcontrol.c:1706 [inline] RIP: 0010:try_charge+0x734/0x1680 mm/memcontrol.c:2264 Code: 85 b8 04 00 00 8b b5 c8 fd ff ff 44 89 f2 4c 89 ff e8 00 51 ff ff 84 c0 0f 85 31 08 00 00 48 c7 c7 c0 17 13 87 e8 8c fd 85 ff <0f> 0b 48 8d 95 f8 fd ff ff 48 8b b5 c0 fd ff ff 48 b8 00 00 00 00 RSP: 0018:ffff8801be6ef580 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8801afab4c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816366f1 RDI: ffff8801be6ef270 RBP: ffff8801be6ef810 R08: ffff8801bcf48140 R09: fffffbfff0ff1238 R10: fffffbfff0ff1238 R11: ffffffff87f891c3 R12: dffffc0000000000 R13: ffff8801be6ef7e8 R14: 0000000000000000 R15: ffff8801afab4c00 mem_cgroup_try_charge+0x4ff/0xa70 mm/memcontrol.c:5916 mem_cgroup_try_charge_delay+0x1d/0x90 mm/memcontrol.c:5931 do_anonymous_page mm/memory.c:3166 [inline] handle_pte_fault mm/memory.c:3971 [inline] __handle_mm_fault+0x25be/0x4470 mm/memory.c:4097 handle_mm_fault+0x53e/0xc80 mm/memory.c:4134 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1395 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1470 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x40e33f Code: Bad RIP value. RSP: 002b:00007ffe221246e0 EFLAGS: 00010206 RAX: 00007fb83d11b000 RBX: 0000000000020000 RCX: 0000000000456b7a RDX: 0000000000021000 RSI: 0000000000021000 RDI: 0000000000000000 RBP: 00007ffe221247c0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe221248b0 R13: 00007fb83d13b700 R14: 0000000000000005 R15: 0000000000000001 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. Tested on: commit: 116b181bb646 Add linux-next specific files for 20180803 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git console output: https://syzkaller.appspot.com/x/log.txt?x=12447864400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b4f38be7c2c519d5 compiler: gcc (GCC) 8.0.1 20180413 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=14c5b68c400000