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 7025AC54EBC for ; Thu, 12 Jan 2023 10:44:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231627AbjALKoN (ORCPT ); Thu, 12 Jan 2023 05:44:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239799AbjALKnl (ORCPT ); Thu, 12 Jan 2023 05:43:41 -0500 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B37F9559D5 for ; Thu, 12 Jan 2023 02:39:14 -0800 (PST) Received: by mail-io1-f72.google.com with SMTP id z9-20020a6b0a09000000b00704712ed815so2264508ioi.1 for ; Thu, 12 Jan 2023 02:39:14 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=VnKhe0iS3J3W3e5PflYz/NRDSoAlIzfHDT8POPYHldY=; b=VG0rT9AU55lUcAYYn2+AITrCFXWpmskb1T/3nEJYSbBF6Oicv28DfglXCjblyqZmez WPf5A1m1HBA5HKGaOEvV+J0NebLoFoZeRBVINAxeHIbxxTz0HjTUu2RrzRLAd5QBDVd3 JgB4ij3FDUEHJErKrv2BlUInggtn39YIcy8hdTRygjzi21rw2HfWnP3aL40PcpIBUhJN r6R8jZZGLIWauxqPSllIk00ax5GGMRQYnUFZTqkFR57F42byJD6uNyJKPwW1cSsMrDRw BcylqjZKCmEwmChrZZTHCg0U/zuucMCtF1V+3UqAfzEiS8NBH4E314Smr6kqcU7UNX2c qQ4Q== X-Gm-Message-State: AFqh2kq2BsVVEaUOyGR29+Qc23G3DYk+mSkvNOQmV2ClWdPoBylIRALJ DqLDSLBQ+86S34wZRCreQH7v80Ew6tLd2wpwj/lEJGV2CSaX X-Google-Smtp-Source: AMrXdXtbMDHOx8CT7v8VuiJN0EpoVSMy4nlnnMx41D+bbZQYIatNJtLZa9EE+0sazTHaMaPorXw+jpfkng6WZPOJzJ8KKwT1DWPK MIME-Version: 1.0 X-Received: by 2002:a92:ccc2:0:b0:302:eed9:c605 with SMTP id u2-20020a92ccc2000000b00302eed9c605mr7743672ilq.49.1673519954061; Thu, 12 Jan 2023 02:39:14 -0800 (PST) Date: Thu, 12 Jan 2023 02:39:14 -0800 In-Reply-To: <541f398a-1ac2-3cc8-33cc-eda9511c7e2e@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000062f11705f20eba0c@google.com> Subject: Re: [syzbot] WARNING: ODEBUG bug in __io_put_task From: syzbot To: asml.silence@gmail.com Cc: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org > On 1/12/23 10:14, syzbot wrote: >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: 0a093b2893c7 Add linux-next specific files for 20230112 >> git tree: linux-next >> console output: https://syzkaller.appspot.com/x/log.txt?x=14d269ce480000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=835f3591019836d5 >> dashboard link: https://syzkaller.appspot.com/bug?extid=1aa0bce76589e2e98756 >> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 >> >> Unfortunately, I don't have any reproducer for this issue yet. > > #syz test: git://git.kernel.dk/linux.git syztest This crash does not have a reproducer. I cannot test it. > >> >> Downloadable assets: >> disk image: https://storage.googleapis.com/syzbot-assets/8111a570d6cb/disk-0a093b28.raw.xz >> vmlinux: https://storage.googleapis.com/syzbot-assets/ecc135b7fc9a/vmlinux-0a093b28.xz >> kernel image: https://storage.googleapis.com/syzbot-assets/ca8d73b446ea/bzImage-0a093b28.xz >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+1aa0bce76589e2e98756@syzkaller.appspotmail.com >> >> ------------[ cut here ]------------ >> ODEBUG: free active (active state 1) object: ffff88801fe06ca8 object type: rcu_head hint: 0x0 >> WARNING: CPU: 0 PID: 6765 at lib/debugobjects.c:509 debug_print_object+0x194/0x2c0 lib/debugobjects.c:509 >> Modules linked in: >> CPU: 0 PID: 6765 Comm: kworker/0:29 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 >> Workqueue: events io_fallback_req_func >> RIP: 0010:debug_print_object+0x194/0x2c0 lib/debugobjects.c:509 >> Code: df 48 89 fe 48 c1 ee 03 80 3c 16 00 0f 85 c7 00 00 00 48 8b 14 dd c0 dc a6 8a 50 4c 89 ee 48 c7 c7 80 d0 a6 8a e8 00 79 ae 05 <0f> 0b 58 83 05 ce 27 66 0a 01 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e >> RSP: 0018:ffffc900057df950 EFLAGS: 00010286 >> RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 >> RDX: ffff88807d03d7c0 RSI: ffffffff8166972c RDI: fffff52000afbf1c >> RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 >> R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8a4dd0a0 >> R13: ffffffff8aa6d580 R14: ffff88802a8da408 R15: 0000000000000000 >> FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 >> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> CR2: 000055574b30e000 CR3: 000000001ddab000 CR4: 00000000003506f0 >> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 >> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 >> Call Trace: >> >> __debug_check_no_obj_freed lib/debugobjects.c:996 [inline] >> debug_check_no_obj_freed+0x305/0x420 lib/debugobjects.c:1027 >> slab_free_hook mm/slub.c:1756 [inline] >> slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1807 >> slab_free mm/slub.c:3787 [inline] >> kmem_cache_free+0xec/0x4e0 mm/slub.c:3809 >> put_task_struct_many include/linux/sched/task.h:125 [inline] >> __io_put_task+0x155/0x1e0 io_uring/io_uring.c:725 >> io_put_task io_uring/io_uring.h:328 [inline] >> __io_req_complete_post+0x7ac/0xcd0 io_uring/io_uring.c:978 >> io_req_complete_post+0xf1/0x1a0 io_uring/io_uring.c:992 >> io_req_task_complete+0x189/0x260 io_uring/io_uring.c:1623 >> io_poll_task_func+0xa95/0x1220 io_uring/poll.c:347 >> io_fallback_req_func+0xfd/0x204 io_uring/io_uring.c:252 >> process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293 >> worker_thread+0x669/0x1090 kernel/workqueue.c:2440 >> kthread+0x2e8/0x3a0 kernel/kthread.c:376 >> ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 >> >> >> >> --- >> This report is generated by a bot. It may contain errors. >> See https://goo.gl/tpsmEJ for more information about syzbot. >> syzbot engineers can be reached at syzkaller@googlegroups.com. >> >> syzbot will keep track of this issue. See: >> https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > -- > Pavel Begunkov