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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,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 36019C432BE for ; Mon, 30 Aug 2021 09:45:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1543661076 for ; Mon, 30 Aug 2021 09:45:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236132AbhH3JqM (ORCPT ); Mon, 30 Aug 2021 05:46:12 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:45691 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235733AbhH3JqL (ORCPT ); Mon, 30 Aug 2021 05:46:11 -0400 Received: by mail-il1-f199.google.com with SMTP id o12-20020a92dacc000000b00224baf7b16fso8708388ilq.12 for ; Mon, 30 Aug 2021 02:45:18 -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:message-id:subject:from:to; bh=PcEY+rTww21m+G7Vs0ofIy1wfuWZYm/yn/QFACn/7qs=; b=RWpTD+U1rA0vctaxCX8kCSLSqeyWXrBfWdFHeWKfqY5uK8GtfCqsLXjT49mI2z2BvA NIzcmZRo8ojcq6LicnxUhY8T+o+M7+TAjxFT614aQmgIh6KbTG9S35KVeqJ+OeXSrSat kUOR04cu4m+31Cy5RNipDnwqVwABZW71JOlxwJdWzj0X9A55Kv5mxEbwpqlHCswVmEGw r2nY92P//K9aWhgLrXV14j9I8EtwaHkt7+gdAW8llY1wXPIpUG4aeNiMY4t+KWOcKizp Y7N2rqY/utB7qxvob2jMT4OXSaZhScWb0OSsh9hj+Mr60wLnAtJnTONoAZsdC3HloPEY KY8w== X-Gm-Message-State: AOAM533/VtPNDVGg5RhQQHSxMQEkI3m69DVJeZORLxo3KpYOpXgWHKYI 6n0w23rNP+CdBYnWdCURxRUVlIMFWtH8iVD2wXj0BQ9lAvf1 X-Google-Smtp-Source: ABdhPJwYtN6PBq03Zhexj6xa0KTnUum/ZVzsoJ8jI4k4Z3pb3B/YiENk0F8HkQG6wmptAT2VmZ2jpQv8ihMMRpsRxKQNAIyg4ZCm MIME-Version: 1.0 X-Received: by 2002:a92:4453:: with SMTP id a19mr15477499ilm.221.1630316717716; Mon, 30 Aug 2021 02:45:17 -0700 (PDT) Date: Mon, 30 Aug 2021 02:45:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d4ba6405cac3b065@google.com> Subject: [syzbot] WARNING in rcu_core From: syzbot To: bp@alien8.de, dwmw@amazon.co.uk, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 77dd11439b86 Merge tag 'drm-fixes-2021-08-27' of git://ano.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12018abd300000 kernel config: https://syzkaller.appspot.com/x/.config?x=2fd902af77ff1e56 dashboard link: https://syzkaller.appspot.com/bug?extid=f2ceae48bb0c0ab08b9d compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f2ceae48bb0c0ab08b9d@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: active_state not available (active state 0) object type: rcu_head hint: 0x0 WARNING: CPU: 0 PID: 8442 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline] WARNING: CPU: 0 PID: 8442 at lib/debugobjects.c:508 debug_object_active_state+0x28a/0x410 lib/debugobjects.c:946 Modules linked in: CPU: 0 PID: 8442 Comm: syz-executor.2 Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object lib/debugobjects.c:505 [inline] RIP: 0010:debug_object_active_state+0x28a/0x410 lib/debugobjects.c:946 Code: e8 fb c6 be fd 4c 8b 45 00 48 c7 c7 c0 a2 93 8a 48 c7 c6 60 9f 93 8a 48 c7 c2 00 a5 93 8a 31 c9 49 89 d9 31 c0 e8 16 58 41 fd <0f> 0b e9 9f 00 00 00 45 31 f6 ff 05 66 bd 9d 0c 43 8a 04 2f 84 c0 RSP: 0018:ffffc90000007ba0 EFLAGS: 00010246 RAX: b9c220867f01ad00 RBX: 0000000000000000 RCX: ffff88801b5b0000 RDX: 0000000080000101 RSI: 0000000080000101 RDI: 0000000000000000 RBP: ffffffff8a304d00 R08: ffffffff81664f72 R09: ffffed1017383f2c R10: ffffed1017383f2c R11: 0000000000000000 R12: ffff888000137e18 R13: dffffc0000000000 R14: 1ffff11000026fc3 R15: ffff88805ec97ba0 FS: 0000000002131400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000001ffffc00 CR3: 00000000505bb000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_rcu_head_unqueue kernel/rcu/rcu.h:185 [inline] rcu_do_batch kernel/rcu/tree.c:2543 [inline] rcu_core+0x8a6/0x14b0 kernel/rcu/tree.c:2785 __do_softirq+0x372/0x783 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:finish_lock_switch+0xf0/0x1c0 kernel/sched/core.c:4436 Code: 61 0c 00 74 11 48 89 df be ff ff ff ff e8 18 33 80 08 85 c0 74 27 4d 85 ff 75 44 4c 89 f7 e8 a7 dd 82 08 e8 f2 40 2d 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 4d 85 ff 75 92 eb a8 0f 0b 4d RSP: 0018:ffffc9000167fa30 EFLAGS: 00000282 RAX: b9c220867f01ad00 RBX: ffff8880902a54f4 RCX: ffffffff9070c703 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 1ffff1101738a400 R08: ffffffff8186a520 R09: ffffed101738a2a9 R10: ffffed101738a2a9 R11: 0000000000000000 R12: ffff8880b9c52000 R13: dffffc0000000000 R14: ffff8880b9c51540 R15: 0000000000000000 finish_task_switch+0x140/0x630 kernel/sched/core.c:4553 context_switch kernel/sched/core.c:4684 [inline] __schedule+0xc0f/0x11f0 kernel/sched/core.c:5938 schedule+0x14b/0x210 kernel/sched/core.c:6017 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x1b6/0x7b0 kernel/time/hrtimer.c:1896 hrtimer_nanosleep+0x239/0x470 kernel/time/hrtimer.c:1949 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline] __se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline] __x64_sys_clock_nanosleep+0x344/0x3d0 kernel/time/posix-timers.c:1245 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x48a7c1 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f RSP: 002b:00007ffe3a1cf3e0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 00000000000019ce RCX: 000000000048a7c1 RDX: 00007ffe3a1cf420 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe3a1cf4bc R08: 0000000000000000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000001f8f0a R14: 000000000000000b R15: 00007ffe3a1cf520 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0c 00 or $0x0,%al 2: 74 11 je 0x15 4: 48 89 df mov %rbx,%rdi 7: be ff ff ff ff mov $0xffffffff,%esi c: e8 18 33 80 08 callq 0x8803329 11: 85 c0 test %eax,%eax 13: 74 27 je 0x3c 15: 4d 85 ff test %r15,%r15 18: 75 44 jne 0x5e 1a: 4c 89 f7 mov %r14,%rdi 1d: e8 a7 dd 82 08 callq 0x882ddc9 22: e8 f2 40 2d 00 callq 0x2d4119 27: fb sti 28: 5b pop %rbx * 29: 41 5c pop %r12 <-- trapping instruction 2b: 41 5d pop %r13 2d: 41 5e pop %r14 2f: 41 5f pop %r15 31: 5d pop %rbp 32: c3 retq 33: 0f 0b ud2 35: 4d 85 ff test %r15,%r15 38: 75 92 jne 0xffffffcc 3a: eb a8 jmp 0xffffffe4 3c: 0f 0b ud2 3e: 4d rex.WRB --- This report is generated by a bot. 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