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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 30AC7C433E1 for ; Wed, 26 Aug 2020 08:54:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0637F2071E for ; Wed, 26 Aug 2020 08:54:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727792AbgHZIyW (ORCPT ); Wed, 26 Aug 2020 04:54:22 -0400 Received: from mail-il1-f200.google.com ([209.85.166.200]:42504 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726817AbgHZIyR (ORCPT ); Wed, 26 Aug 2020 04:54:17 -0400 Received: by mail-il1-f200.google.com with SMTP id z1so1043399ilz.9 for ; Wed, 26 Aug 2020 01:54:16 -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=KWA98gUVVPLAB5mEnwjYg2XuRfaodeLtZ5bQKkNE1+8=; b=Rll3/Ej+1BasFeSEAhGquljB+Zm++8BvsNXxTqT/75yJIlXIDgVUYBUikgMgPCoI9t st9r2onVi9uiDSb1GPd4EaR0Szvo6zR5L34/d1UbSiiyUFfcrP192Vo26WsqM9/fUEaW 051J8UoPLBpdi63NT11Hu2jXv0XalEnna+1t6cCy7zL6JDW2j1iRNoRu/WdB0oQ3sB4J +auBGwB9XJYrxB8wJNQiVf2xQ9MjPCPPogKO8rd5W5eiHxrky+Ga8iGS64AbQxtBIB8E 98eFuo1wpR4WMhVd7WzTuhoPbQw9omxZVeTMxoPB1YYJBacsLZmHJ/m7dUeNIiwiFHHy xJHQ== X-Gm-Message-State: AOAM531un6iEomPw3630x7kEXommXk69O5jVg3lr46dC+Kwi7mJcSGT/ aJiq4p+r92kLNZzTUoyXdx864u+PwjCBerp4DneurMXDSwJx X-Google-Smtp-Source: ABdhPJwojF1/sq+xfygWWoJd7PvjM53WyuPf8Nd+Tw6jH4PzPCaeufjMYI+Yv+PKmImWIEaesLI5rp/287INPrLafU2b3mDtP40z MIME-Version: 1.0 X-Received: by 2002:a05:6638:3ea:: with SMTP id s10mr4453619jaq.2.1598432056177; Wed, 26 Aug 2020 01:54:16 -0700 (PDT) Date: Wed, 26 Aug 2020 01:54:16 -0700 In-Reply-To: <001a1143e62eb6a9510565640e76@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e7fab005adc3f636@google.com> Subject: Re: WARNING: ODEBUG bug in __do_softirq From: syzbot To: akpm@linux-foundation.org, anna.schumaker@netapp.com, bfields@fieldses.org, bp@alien8.de, davem@davemloft.net, douly.fnst@cn.fujitsu.com, hpa@zytor.com, jlayton@kernel.org, konrad.wilk@oracle.com, len.brown@intel.com, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, mingo@kernel.org, mingo@redhat.com, netdev@vger.kernel.org, paulmck@kernel.org, peterz@infradead.org, puwen@hygon.cn, rafael.j.wysocki@intel.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, trond.myklebust@hammerspace.com, trond.myklebust@primarydata.com, vbabka@suse.cz, x86@kernel.org Content-Type: text/plain; charset="UTF-8" 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 issue on: HEAD commit: 3a00d3df Add linux-next specific files for 20200825 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15080fa9900000 kernel config: https://syzkaller.appspot.com/x/.config?x=9ef0a5f95935d447 dashboard link: https://syzkaller.appspot.com/bug?extid=51c9bdfa559769d2f897 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17927a2e900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132b8ede900000 The issue was bisected to: commit 5b317cbf2bcb85a1e96ce87717cb991ecab1dd4d Author: Rafael J. Wysocki Date: Fri Feb 22 09:17:11 2019 +0000 Merge branch 'pm-cpufreq-fixes' bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=171ead5d200000 final oops: https://syzkaller.appspot.com/x/report.txt?x=149ead5d200000 console output: https://syzkaller.appspot.com/x/log.txt?x=109ead5d200000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+51c9bdfa559769d2f897@syzkaller.appspotmail.com Fixes: 5b317cbf2bcb ("Merge branch 'pm-cpufreq-fixes'") ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: work_struct hint: afs_manage_cell+0x0/0x11c0 fs/afs/cell.c:498 WARNING: CPU: 1 PID: 16 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 lib/debugobjects.c:485 Modules linked in: CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.9.0-rc2-next-20200825-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x160/0x250 lib/debugobjects.c:485 Code: dd 60 56 94 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 60 56 94 88 48 c7 c7 c0 4b 94 88 e8 eb bd a4 fd <0f> 0b 83 05 13 50 1b 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 RSP: 0018:ffffc90000d7fbf8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffff8880a9686440 RSI: ffffffff815da937 RDI: fffff520001aff71 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ae720f8b R10: 0000000000000000 R11: 203a47554245444f R12: ffffffff89ba35e0 R13: ffffffff814b6290 R14: dead000000000100 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9120aabe78 CR3: 0000000088b2e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:967 [inline] debug_check_no_obj_freed+0x301/0x41c lib/debugobjects.c:998 kfree+0xf0/0x2c0 mm/slab.c:3755 rcu_do_batch kernel/rcu/tree.c:2474 [inline] rcu_core+0x61e/0x1220 kernel/rcu/tree.c:2709 __do_softirq+0x2de/0xa24 kernel/softirq.c:298 run_ksoftirqd kernel/softirq.c:652 [inline] run_ksoftirqd+0x89/0x100 kernel/softirq.c:644 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:165 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294