From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 3223328C2A1 for ; Mon, 22 Jun 2026 17:01:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782147688; cv=none; b=JpmmhL/Y9LQ3xnb+EZE9aNfwItdoULuAG12KkSsqI8u7j6Lbna6nC/YP+n0TWT4u1mflrNqAsqogWDudAezzDruJzyvQCaUqDm5KB6Yo8567H7FeMQefiFtXzcEbChV9Fr/JsQukhqq5SUbUn2NY3fxrW/mmnYRteSUvyImqqbk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782147688; c=relaxed/simple; bh=wQqkN2cHqzACXP03tdU2Ir7GLJ158xuVoUdoWKMnod8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=kQQF7t37WYalaOzM4j7HsHHjhglFiijuUa+fNeTyCOvz0gFXUNE+Tc5MYfr63+3bLumDxovVU8+cOGnkCHnyN9yb4BHkYy83qWS+VWKMftIgeaPaVCpuhUfHTN2KNanQKMrz//Bn62Vk9cAk7yLFeVkGnknz5I9uw+65HY9ZWrk= 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=209.85.161.78 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-oo1-f78.google.com with SMTP id 006d021491bc7-6a100cc5ad0so97827eaf.1 for ; Mon, 22 Jun 2026 10:01:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782147686; x=1782752486; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=GHC7doRNUnQxvHDNdnUFh6/Vrao4hlxF0VFgayPnUEk=; b=psdEGgQr4KGnbl6hqa6kQEt7izZ/CYVv649nTHOAjyiXqyozM2OTYulMix0ZqIYzsY 7uGPetI8IXw1aT9/vg57UnUbbWSJbIcrGjpVAgzjR8ya+oFAvEYmJJP21DOMpaux5Gua 9mzt6tS4PtaMuonaRzIQTCqfK7PfZxZOPoOrBNNZIVy8K5m/cJkraTB1yYFuUyqJE/vZ 48ZfYKZtnK2EJWUdNfBritGXH5IhHoDmVY0rwPyZKtTdT9wtFzS6J46XaQWqxbQNQfsV qLOR6yEaSVKmNZLYTk1saz/3xGAJOI8kYcB0O4NqpwYd+zf67zpe9DWBq7nRYzuVxjBM wpVA== X-Forwarded-Encrypted: i=1; AFNElJ8wqTODwxYdPR1TLYkTCOQ7pTNMQzRqM5srHfz8sQhHCMEkiFsq6eb9bD4A2U3J4GEkQuw=@vger.kernel.org X-Gm-Message-State: AOJu0YxTFpwl+x0WcAAn2Y72PtQ9xi0rbuOc1FPBIoNUPIxoP54D+kPO bFOe8kuADxYEjSzYmMFxr0BZo9qxPHZ++f3RSlolDrafWoi+n+aoagvw+aCQN5GohGnznVOfFhz wiBhgfQG71nvlLgmwLC85busDWc5EXx65Bf8BhtXKL7LN0Nr1tZEtZv9hh+U= Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:212:b0:6a1:11fa:1b37 with SMTP id 006d021491bc7-6a1127a4e06mr176024eaf.25.1782147686107; Mon, 22 Jun 2026 10:01:26 -0700 (PDT) Date: Mon, 22 Jun 2026 10:01:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a396a66.52ae72c2.136ac7.0002.GAE@google.com> Subject: [syzbot] [kvm-x86?] WARNING in hv_tlb_flush_enqueue From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, seanjc@google.com, syzkaller-bugs@googlegroups.com, tglx@kernel.org, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8cd8cf7a07e5 Merge tag 'scsi-misc' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1012a7a1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e69294ccc24d9da dashboard link: https://syzkaller.appspot.com/bug?extid=5d2b94b77112148d1744 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c0db7a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13dd001c580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-8cd8cf7a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b15ef084e059/vmlinux-8cd8cf7a.xz kernel image: https://storage.googleapis.com/syzbot-assets/a22f25c3f8ee/bzImage-8cd8cf7a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5d2b94b77112148d1744@syzkaller.appspotmail.com ------------[ cut here ]------------ pvqspinlock: lock 0xffff88802c0c8790 has corrupted value 0x0! WARNING: kernel/locking/qspinlock_paravirt.h:504 at __pv_queued_spin_unlock_slowpath+0x220/0x2e0 kernel/locking/qspinlock_paravirt.h:504, CPU#0: syz.0.3154/18851 Modules linked in: CPU: 0 UID: 0 PID: 18851 Comm: syz.0.3154 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__pv_queued_spin_unlock_slowpath+0x223/0x2e0 kernel/locking/qspinlock_paravirt.h:504 Code: fc ff df 48 c1 ea 03 0f b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 4d 41 8b 14 24 48 8d 3d 40 00 44 05 4c 89 e6 <67> 48 0f b9 3a e9 2f ff ff ff 48 89 df 48 89 14 24 e8 17 07 e0 f6 RSP: 0018:ffffc9000c4273a0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff88802c0c8790 RCX: ffffffff8b99c87f RDX: 0000000000000000 RSI: ffff88802c0c8790 RDI: ffffffff90ddc8f0 RBP: ffff88802c0c8798 R08: 0000000000000000 R09: ffffed10058190f2 R10: ffff88802c0c8793 R11: 0000000000000000 R12: ffff88802c0c8790 R13: ffff88802c0c8000 R14: 0000000000000000 R15: ffff88802c0c87d0 FS: 00007ffaf56696c0(0000) GS:ffff8880d6318000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005645e000 CR4: 0000000000352ef0 Call Trace: __raw_callee_save___pv_queued_spin_unlock_slowpath+0x15/0x40 .slowpath+0x9/0x18 pv_queued_spin_unlock arch/x86/include/asm/paravirt-spinlock.h:40 [inline] queued_spin_unlock arch/x86/include/asm/paravirt-spinlock.h:72 [inline] do_raw_spin_unlock+0x145/0x1e0 kernel/locking/spinlock_debug.c:142 __raw_spin_unlock include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock+0x1e/0x50 kernel/locking/spinlock.c:190 spin_unlock include/linux/spinlock.h:390 [inline] hv_tlb_flush_enqueue.isra.0+0x195/0x200 arch/x86/kvm/hyperv.c:1967 kvm_hv_flush_tlb+0x17b4/0x1ae0 arch/x86/kvm/hyperv.c:2150 kvm_hv_hypercall+0xd0b/0x2350 arch/x86/kvm/hyperv.c:2629 kvm_emulate_hypercall+0x115/0x3c0 arch/x86/kvm/x86.c:10510 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6848 [inline] vmx_handle_exit+0x4d6/0x1ef0 arch/x86/kvm/vmx/vmx.c:6858 vcpu_enter_guest arch/x86/kvm/x86.c:11550 [inline] vcpu_run+0x3558/0x5d50 arch/x86/kvm/x86.c:11707 kvm_arch_vcpu_ioctl_run+0x5b6/0x1890 arch/x86/kvm/x86.c:12062 kvm_vcpu_ioctl+0x730/0x1700 virt/kvm/kvm_main.c:4470 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffaf479ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffaf5669028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffaf4a15fa0 RCX: 00007ffaf479ce59 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 00007ffaf4832e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffaf4a16038 R14: 00007ffaf4a15fa0 R15: 00007ffcc021d3a8 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 c1 ea 03 shr $0x3,%rdx 4: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 8: 4c 89 e0 mov %r12,%rax b: 83 e0 07 and $0x7,%eax e: 83 c0 03 add $0x3,%eax 11: 38 d0 cmp %dl,%al 13: 7c 04 jl 0x19 15: 84 d2 test %dl,%dl 17: 75 4d jne 0x66 19: 41 8b 14 24 mov (%r12),%edx 1d: 48 8d 3d 40 00 44 05 lea 0x5440040(%rip),%rdi # 0x5440064 24: 4c 89 e6 mov %r12,%rsi * 27: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2c: e9 2f ff ff ff jmp 0xffffff60 31: 48 89 df mov %rbx,%rdi 34: 48 89 14 24 mov %rdx,(%rsp) 38: e8 17 07 e0 f6 call 0xf6e00754 --- This report is generated by a bot. 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