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=-0.4 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 9F26DC28CF8 for ; Sun, 14 Oct 2018 00:11:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4538920693 for ; Sun, 14 Oct 2018 00:11:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4538920693 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 S1726339AbeJNHuB (ORCPT ); Sun, 14 Oct 2018 03:50:01 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:34507 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726042AbeJNHuB (ORCPT ); Sun, 14 Oct 2018 03:50:01 -0400 Received: by mail-io1-f71.google.com with SMTP id y3-v6so15020896iob.1 for ; Sat, 13 Oct 2018 17:11:03 -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=xQAgvQRu7sH2JoNTQCcRvqDOKCQEu4QBeslDrU2lMac=; b=XfIrj8YNZrdjAYa/abEVD/rNpIbSp5dfo7mmrKYNv8oujYz0t2Lq1kabIG3/E9yAtN KZ2FH3SDwtEna4fWb+koAVGvnb2V07KknYXITdZhq4aNPIbgYVbullD8fsIXeoruwbF4 h/N7tJW1GG6Okths3Px0/NdqeDDPEOMG+oEapTojBAbAN2aFGAm1atiJEy+Mm16I/SwE 2WJb55Vrv7f/u6SNPx7aJp5dKGXEGR2ZNaLt+NAeWiUNDYmekwXKQAPU4s4bTmtI26ZL g5N3ZnYkM202tWZ5MhvoffYjILSBHnsxiQzf4h6PvH89Fynd0QSKCc1F8WuPBR10Z5qk nwlA== X-Gm-Message-State: ABuFfojqP62hu0+oTnFCv+/1YU4yhKszhrVYcvb4wX0b4g2EEVAMcLa/ jwELe6hqPs5ckKEwOvCRDcukE1e1RjdWoqzhBSod5knG78kc X-Google-Smtp-Source: ACcGV62+yV3ODqAVxKgeMzc99xIHNk33N8Zw/KQ4kiF6LdZHzuBFxQCjCPWDs/a+FR7wQ+89brjjgEhR3llPtCln2nM372OXP4m8 MIME-Version: 1.0 X-Received: by 2002:a6b:4614:: with SMTP id t20-v6mr9159182ioa.13.1539475862787; Sat, 13 Oct 2018 17:11:02 -0700 (PDT) Date: Sat, 13 Oct 2018 17:11:02 -0700 In-Reply-To: <00000000000009f9a305708faf46@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f11d1c05782527d2@google.com> Subject: Re: WARNING in cgroup_apply_control_enable From: syzbot To: davem@davemloft.net, guro@fb.com, linux-kernel@vger.kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, tj@kernel.org 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 syzbot has found a reproducer for the following crash on: HEAD commit: 1ae80cf31938 bpf: wait for running BPF programs when updat.. git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=12b82735400000 kernel config: https://syzkaller.appspot.com/x/.config?x=7e7e2279c0020d5f dashboard link: https://syzkaller.appspot.com/bug?extid=5493b2a54d31d6aea629 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=120ead5e400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132b7426400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5493b2a54d31d6aea629@syzkaller.appspotmail.com IPVS: ftp: loaded support on port[0] = 21 WARNING: CPU: 0 PID: 5812 at kernel/cgroup/cgroup.c:2931 cgroup_apply_control_enable+0x22c/0xea0 kernel/cgroup/cgroup.c:2931 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 5812 Comm: syz-executor858 Not tainted 4.19.0-rc6+ #119 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+0x1c4/0x2b4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x254/0x2d0 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:993 RIP: 0010:cgroup_apply_control_enable+0x22c/0xea0 kernel/cgroup/cgroup.c:2931 Code: 48 c1 e8 03 42 80 3c 28 00 0f 85 18 0a 00 00 49 8b 5f 18 31 ff 83 e3 02 48 89 de e8 5e 60 07 00 48 85 db 74 07 e8 24 5f 07 00 <0f> 0b e8 1d 5f 07 00 48 8b 85 a0 fe ff ff 48 c1 e8 03 42 80 3c 28 RSP: 0018:ffff8801bbe97808 EFLAGS: 00010293 RAX: ffff8801bbee2040 RBX: 0000000000000002 RCX: ffffffff81777662 RDX: 0000000000000000 RSI: ffffffff8177766c RDI: 0000000000000007 RBP: ffff8801bbe979b8 R08: ffff8801bbee2040 R09: fffffbfff1277dac R10: ffff8801bbe97890 R11: ffffffff893bed67 R12: ffffffff893c50c0 R13: dffffc0000000000 R14: 000000000000000b R15: ffff8801d8f08a40 cgroup_apply_control+0x1f/0x50 kernel/cgroup/cgroup.c:3017 cgroup_enable_threaded kernel/cgroup/cgroup.c:3229 [inline] cgroup_type_write+0x3bb/0x580 kernel/cgroup/cgroup.c:3270 cgroup_file_write+0x2f7/0x7e0 kernel/cgroup/cgroup.c:3450 kernfs_fop_write+0x2ba/0x480 fs/kernfs/file.c:316 __vfs_write+0x119/0x9f0 fs/read_write.c:485 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441d29 Code: e8 cc b2 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe2c31df58 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441d29 RDX: 0000000000000009 RSI: 0000000020000140 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000000001 R13: 000000000000bc4a R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..