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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62FA6C4332F for ; Tue, 22 Feb 2022 17:52:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234674AbiBVRw1 (ORCPT ); Tue, 22 Feb 2022 12:52:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234614AbiBVRw0 (ORCPT ); Tue, 22 Feb 2022 12:52:26 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4C932C7E7E for ; Tue, 22 Feb 2022 09:52:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645552319; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nni+lwg+vURAlQ1l6Xl0fUh9nRnO1LrD4u/eCChPHCE=; b=DLScQrRYLhydsVITCravgMrBdldb1oTbkaZ6fCZO20zVDaoS1c0hyczeSoN2qwDHcUvk5e K6flmdJbfVBIQMXcQlf4mYNHO663RtOkm5EKILDGDJednV31buw8JFO/3fdizup7S1/fuH ux2XtLRkZR2gniV5ktaJkdTfO4s+Ssw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-637-TUnx2vHpM3S1tSl3hwV0LQ-1; Tue, 22 Feb 2022 12:51:56 -0500 X-MC-Unique: TUnx2vHpM3S1tSl3hwV0LQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2924C80DE0F; Tue, 22 Feb 2022 17:51:54 +0000 (UTC) Received: from [10.22.11.128] (unknown [10.22.11.128]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA90567658; Tue, 22 Feb 2022 17:51:52 +0000 (UTC) Message-ID: Date: Tue, 22 Feb 2022 12:51:52 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [syzbot] WARNING in cpuset_write_resmask Content-Language: en-US To: Tejun Heo , syzbot Cc: cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, lizefan.x@bytedance.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000264b2a05d44bca80@google.com> <0000000000008f71e305d89070bb@google.com> From: Waiman Long In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/22/22 12:26, Tejun Heo wrote: > (cc'ing Waiman and quoting whole body) > > Hello, Waiman. > > It looks like it's hitting > > WARN_ON(!is_in_v2_mode() && !nodes_equal(cp->mems_allowed, cp->effective_mems)) > > Can you take a look? Sure. I will take a look at that. Cheers, Longman > > Thanks. > > On Mon, Feb 21, 2022 at 04:29:18PM -0800, syzbot wrote: >> syzbot has found a reproducer for the following issue on: >> >> HEAD commit: e5313968c41b Merge branch 'Split bpf_sk_lookup remote_port.. >> git tree: bpf-next >> console output: https://syzkaller.appspot.com/x/log.txt?x=113aeefa700000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=c40b67275bfe2a58 >> dashboard link: https://syzkaller.appspot.com/bug?extid=568dc81cd20b72d4a49f >> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13bb97ce700000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12062c8e700000 >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+568dc81cd20b72d4a49f@syzkaller.appspotmail.com >> >> ------------[ cut here ]------------ >> WARNING: CPU: 1 PID: 3647 at kernel/cgroup/cpuset.c:1817 update_nodemasks_hier kernel/cgroup/cpuset.c:1817 [inline] >> WARNING: CPU: 1 PID: 3647 at kernel/cgroup/cpuset.c:1817 update_nodemask kernel/cgroup/cpuset.c:1890 [inline] >> WARNING: CPU: 1 PID: 3647 at kernel/cgroup/cpuset.c:1817 cpuset_write_resmask+0x167b/0x20f0 kernel/cgroup/cpuset.c:2457 >> Modules linked in: >> CPU: 0 PID: 3647 Comm: syz-executor287 Not tainted 5.16.0-syzkaller-11655-ge5313968c41b #0 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 >> RIP: 0010:update_nodemasks_hier kernel/cgroup/cpuset.c:1817 [inline] >> RIP: 0010:update_nodemask kernel/cgroup/cpuset.c:1890 [inline] >> RIP: 0010:cpuset_write_resmask+0x167b/0x20f0 kernel/cgroup/cpuset.c:2457 >> Code: 3c 08 00 0f 85 ed 08 00 00 49 8b 9c 24 38 01 00 00 48 89 ef 48 89 de e8 63 4a 04 00 48 39 dd 0f 84 dd ef ff ff e8 e5 46 04 00 <0f> 0b e9 d1 ef ff ff e8 d9 46 04 00 e8 b4 a5 ef ff e8 cf 46 04 00 >> RSP: 0018:ffffc90003acfb18 EFLAGS: 00010293 >> RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 >> RDX: ffff88801e193a00 RSI: ffffffff81740f0b RDI: 0000000000000003 >> RBP: 0000000000000003 R08: 0000000000000003 R09: ffffffff8fdeca17 >> R10: ffffffff81740efd R11: 0000000000000001 R12: ffff888074f2e000 >> R13: ffff888074f2e054 R14: ffff888074f2e138 R15: 0000000000000000 >> FS: 00007fee62f33700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 00007ffcf8240960 CR3: 0000000072ae3000 CR4: 00000000003506f0 >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >> Call Trace: >> >> cgroup_file_write+0x1de/0x760 kernel/cgroup/cgroup.c:3877 >> kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296 >> call_write_iter include/linux/fs.h:2086 [inline] >> new_sync_write+0x431/0x660 fs/read_write.c:503 >> vfs_write+0x7cd/0xae0 fs/read_write.c:590 >> ksys_write+0x12d/0x250 fs/read_write.c:643 >> do_syscall_x64 arch/x86/entry/common.c:50 [inline] >> do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 >> entry_SYSCALL_64_after_hwframe+0x44/0xae >> RIP: 0033:0x7fee62f82b79 >> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 >> RSP: 002b:00007fee62f33308 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 >> RAX: ffffffffffffffda RBX: 00007fee6300c4c8 RCX: 00007fee62f82b79 >> RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000006 >> RBP: 00007fee6300c4c0 R08: 0000000000000012 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee6300c4cc >> R13: 00007fee62fd92b0 R14: 6d2e746573757063 R15: 0000000000022000 >> >>