From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1CAA37F002 for ; Fri, 16 Oct 2026 15:00:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792162827; cv=none; b=OEpc0jAmqC77K8ryrGIkZXeU/5HyOSvNbNfxjjjtc4ZbYa3YU8f66lUonP9wn7HKoVro5ubnBvidEkfZUMBPZThEPy6MvTfCGEx8LH3rKVzQcnRnPCtIg/BXNRfh+4Tk0Dor6gIae/ER5qZC2nyp4khoE+TdStzPKPKUekqYNMA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792162827; c=relaxed/simple; bh=3MeGQwF3gUpdjM2xKnUG8PgRH5HJ8TquyxhNEaB1yls=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=hWyPS/f6N8CJLmbPhsq/NI4y1XuRJ8txsXWmvhWMdRT0eKf8nATmFihG4lGHMpyGjO0Od85vMNq3k8g35FdADZms3yQdiupdVDENQWArqHkk04D91QVcfJyiKuqlGg/thpiiQHd1cN/jHI/VjCU8qJ8Ev7/dCXY97HPemv20P8w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f197.google.com with SMTP id 5614622812f47-4dc57e2a3f2so144211b6e.0 for ; Fri, 16 Oct 2026 08:00:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792162825; x=1792767625; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=N8vU9eG3N0gm3q3XnBKVktTduhhmN3KZoJgu5jBd7w4=; b=gKE890Oec89jslSrmn9ucA9Iv5FsVCEbiKIBxe3oPXLPVLkVFbtgv+iVzjORphyK0R FHbx9y//670wCCrAbIAo2uJr8Ia55ihfPAVZTCB9zsdRoJuLdJn0odVAhCGbi3K8BhiS rgYVB2w2PcsbI20MIazsDwdMb1bMfrkTnJAxnJOoofKhHbegXRXsQbA98mrYBbkLUigS n2V/pCRqiGQ8Vq1/fWWlLvknFz5mNzp0aH7wJPUR+8LvtuM5Hd5lxFTcte5efpcFovPx O53O6fZ/FTTphomyDpFlT+JNNuP8LXuyii6Mi7oWwMPQzRQySUohcgKiqHIiLK15ZION ix4Q== X-Forwarded-Encrypted: i=1; AKwUvBzEpWlrWcMVa8aHzeIrKduTjWHFIXMdjDU+XZC4uxuRvf+p9JtFAsNJS5H4kfe8j7Da4yXHQYsXgqyC@vger.kernel.org X-Gm-Message-State: AFq9FYKyo2czOXMAuvds6hkVXxUtWBm+Qhgfgnny3vspMKtSru3o3sxP 994PEB26UylfSY48Bfh4d5dmETrBujp8f2Gu6M5LeTzi2JjybPb0eCOlG/Ixdvea80VN/05KMYP iDspEtB9T3y+jlLC5qF2Gs8mHxqJgcjE+KY2Nnd6JYf3zPMXRoDrnc2m9cPM= Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:14c5:b0:4f4:6c04:8ac2 with SMTP id 5614622812f47-50c50f2ec7amr17815187b6e.10.1792162824628; Fri, 16 Oct 2026 08:00:24 -0700 (PDT) Date: Fri, 16 Oct 2026 08:00:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad23c08.7952420f.283480.0348.GAE@google.com> Subject: [syzbot] [edac?] WARNING: ODEBUG bug in mcheck_cpu_init From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@kernel.org, tony.luck@intel.com, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2f2f7eeef8b0 Merge tag 'soc-fixes-7.3-3' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1703f701580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b38d39c45202f4fa dashboard link: https://syzkaller.appspot.com/bug?extid=553c9f2c5781192c2214 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bd6590603436/disk-2f2f7eee.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8f022e6e4c47/vmlinux-2f2f7eee.xz kernel image: https://storage.googleapis.com/syzbot-assets/e102a402b091/bzImage-2f2f7eee.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+553c9f2c5781192c2214@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: init active (active state 0) object: ffff8880b85234a0 object type: timer_list hint: mce_timer_fn+0x0/0x280 include/linux/highmem-internal.h:-1 WARNING: lib/debugobjects.c:632 at debug_print_object+0xec/0x230 lib/debugobjects.c:629, CPU#1: swapper/1/0 Modules linked in: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G S syzkaller #0 PREEMPT_{RT,(lazy)} Tainted: [S]=CPU_OUT_OF_SPEC Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:debug_print_object+0x18a/0x230 lib/debugobjects.c:629 Code: f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 7d b5 58 fd 4d 8b 0f 4c 89 ef 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f0 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 ff 05 a3 61 d7 0b 48 83 c4 10 5b 41 5c RSP: 0000:ffffc900001d7c20 EFLAGS: 00010046 RAX: 1ffffffff16df3c0 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffffff8bcc7540 RSI: ffffffff8bcc7140 RDI: ffffffff90bccee0 RBP: ffffffff8bcc7540 R08: ffff8880b85234a0 R09: ffffffff8b6fb180 R10: dffffc0000000000 R11: ffffffff81b2b680 R12: 0000000000000000 R13: ffffffff90bccee0 R14: ffff8880b85234a0 R15: ffffffff8b6f9e00 FS: 0000000000000000(0000) GS:ffff888124abb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000efb0000 CR4: 00000000003506b0 Call Trace: __debug_object_init+0x224/0x350 lib/debugobjects.c:818 debug_timer_init kernel/time/timer.c:788 [inline] debug_init kernel/time/timer.c:836 [inline] timer_init_key+0x41/0x2c0 kernel/time/timer.c:880 __mcheck_cpu_setup_timer arch/x86/kernel/cpu/mce/core.c:2087 [inline] mcheck_cpu_init+0x3dc/0x600 arch/x86/kernel/cpu/mce/core.c:2262 identify_cpu+0x1f2c/0x3940 arch/x86/kernel/cpu/common.c:2126 identify_secondary_cpu+0xaa/0x160 arch/x86/kernel/cpu/common.c:2187 ap_starting+0x9c/0x150 arch/x86/kernel/smpboot.c:190 start_secondary+0x66/0x110 arch/x86/kernel/smpboot.c:280 common_startup_64+0x13e/0x157 ---------------- Code disassembly (best guess): 0: f8 clc 1: 48 c1 e8 03 shr $0x3,%rax 5: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 9: 74 08 je 0x13 b: 4c 89 ff mov %r15,%rdi e: e8 7d b5 58 fd call 0xfd58b590 13: 4d 8b 0f mov (%r15),%r9 16: 4c 89 ef mov %r13,%rdi 19: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 1e: 48 89 ea mov %rbp,%rdx 21: 44 89 e1 mov %r12d,%ecx 24: 4d 89 f0 mov %r14,%r8 27: ff 34 24 push (%rsp) * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 83 c4 08 add $0x8,%rsp 33: ff 05 a3 61 d7 0b incl 0xbd761a3(%rip) # 0xbd761dc 39: 48 83 c4 10 add $0x10,%rsp 3d: 5b pop %rbx 3e: 41 5c pop %r12 --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup