From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (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 A75FC4562BF for ; Tue, 1 Sep 2026 07:43:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788248585; cv=none; b=myklb9XgZmy1OhCo/fJaGwmljaeAvx3nrvcFpsP4s75reKHqSvjvTDiZLiUL0gh0yZVWa3/l/6vpOo0sRUXz9zBsyxYCChrjym7F4kf4+cGmHL9L7CFM3GHR1OZVJMiATsuZOJeVDDHt6Cpk0LoGUTo7f4FGFzVVpVcW8AU1YS4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788248585; c=relaxed/simple; bh=kkwntoT2FHTLl7JrCquPIzFo/ZjRsZ1BK1C3oWd8+CQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=FLJhCJmePLDy5N0UStp5BG5WDPGZigd5BGhKDf4XTDYHA8mc75PnQ6X0sN8G+2nht1t1M4nh7RH57HPq8Yv5J+nbjz+UVEJjnjXhrdDZW8+qusrTptwv38st9ZHRoyHn7BdEs2bptOOAVysRVCr493YbaC772lciDk3VkBjNXI0= 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=209.85.167.198 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-f198.google.com with SMTP id 5614622812f47-4b28dbf4197so779394b6e.2 for ; Tue, 01 Sep 2026 00:43:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788248582; x=1788853382; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=tew7VBqWdhDnbze+5Spky+kmT6aJ8FrHZ2KzX0nElX0=; b=XPPbS8FaXblD6Urc6ByV7odAwV2rOS1b7eSrBpK9Vxrf6tykugElEnkyG7j5LFXPP6 8p4WWbCG/5EiY3qPlS855YCT2Xuh8e8yNXwl+UTFS3vqUTSO7ZU1hfT74kVuUv2LYS4T 9wfL0/nF2f5mVsujKkfTo+M1Jfm8XhdaCa35vzK8nv0AsBFtr3rGIwby+jJ8XTWrvbrC 6EA0waUDz+RegqDeGQQ4u+dziHhP9G4yQl/0PlH0C0RHvmGKUw7ebLz5rYHdIHJrC+Gi tWxC9C5mU75wtCeQU9yeL2stO+Yy17YjRI6l4jUjRPMCrz5FX/4r3k4/Q1VDEHtGwmlN C25Q== X-Gm-Message-State: AFuF++kKpBqPxzwME8/fjgPW5RG0NHpbsXRKLIgp+FpQq4zq6D8LLTI6 FkMxZ58BHXUsCNJu3o9M6lAW/hN87VG2Ubnh7/TU3gEDLHsbaiYrLs1hzBie2TNEPSta0gtmAt5 cdjM7NEvCspSJ/0495hRkdc6qJbZkrjUiaV3iktdOTTs5lIBATviWw7l+ZD0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:c165:b0:4ab:3210:b31a with SMTP id 5614622812f47-4b398253454mr35123663b6e.14.1788248582548; Tue, 01 Sep 2026 00:43:02 -0700 (PDT) Date: Tue, 01 Sep 2026 00:43:02 -0700 In-Reply-To: <7788086b-28f8-435a-a19d-e9ba7bd0e6c8n@googlegroups.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a968206.99c12218.408a8.0003.GAE@google.com> Subject: Re: [syzbot] [edac?] general protection fault in detach_timer (3) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tao1.yu@intel.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING: ODEBUG bug in mcheck_cpu_init ------------[ cut here ]------------ ODEBUG: init active (active state 0) object: ffff8880b87234a0 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 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 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 5d fa 59 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 83 7c d9 0a 48 83 c4 10 5b 41 5c RSP: 0000:ffffc900001d7c20 EFLAGS: 00010046 RAX: 1ffffffff16df350 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffffff8bcc2c40 RSI: ffffffff8bcc2840 RDI: ffffffff8fbc29e0 RBP: ffffffff8bcc2c40 R08: ffff8880b87234a0 R09: ffffffff8b6fae00 R10: dffffc0000000000 R11: ffffffff81b25c80 R12: 0000000000000000 R13: ffffffff8fbc29e0 R14: ffff8880b87234a0 R15: ffffffff8b6f9a80 FS: 0000000000000000(0000) GS:ffff888125ce1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000dfb0000 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:2269 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 5d fa 59 fd call 0xfd59fa70 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 83 7c d9 0a incl 0xad97c83(%rip) # 0xad97cbc 39: 48 83 c4 10 add $0x10,%rsp 3d: 5b pop %rbx 3e: 41 5c pop %r12 Tested on: commit: 3abea627 x86/mce: Shutdown polling timer on teardown p.. git tree: https://github.com/yutao-intel/linux.git fix-edac-v2 console output: https://syzkaller.appspot.com/x/log.txt?x=127e8779580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e618aabdc2dca7e6 dashboard link: https://syzkaller.appspot.com/bug?extid=edc6b57cbed1fb72d0f9 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Note: no patches were applied.