WARNING in vmx_queue_exception

Status: upstream: reported C repro on 2023/03/11 15:11
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+4d82a15086e9913d0e1a@syzkaller.appspotmail.com
First crash: 1323d, last: 2d19h
Fix commit to backport (bisect log) :
tree: upstream
commit fc4fad79fc3d8841562e2a85808079da5b4835f6
Author: Sean Christopherson <seanjc@google.com>
Date: Tue Dec 28 23:24:36 2021 +0000

  KVM: VMX: Reject KVM_RUN if emulation is required with pending exception

  
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: WARNING in vmx_queue_exception (log)
Repro: C syz .config
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/05/19 linux-5.15.y (ToT) 9d6bde853685 C [report] WARNING in vmx_queue_exception
2023/05/19 upstream (ToT) 2d1bcbc6cd70 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in vmx_queue_exception kvm-x86 -1 8 1702d 1764d 20/29 fixed on 2022/03/08 16:11
upstream WARNING in vmx_queue_exception (2) kvm-x86 -1 syz, C 5 1637d 1636d 22/29 fixed on 2023/02/24 13:50
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/08/09 02:30 15m retest repro linux-5.15.y report log
2026/08/09 02:30 44m retest repro linux-5.15.y report log
2026/08/09 02:30 16m retest repro linux-5.15.y report log
2026/08/09 02:30 16m retest repro linux-5.15.y report log
2026/08/09 02:30 15m retest repro linux-5.15.y report log
2026/03/15 23:21 10m retest repro linux-5.15.y error
2026/03/15 23:21 10m retest repro linux-5.15.y error
2026/03/15 23:21 10m retest repro linux-5.15.y error
2026/03/15 23:21 10m retest repro linux-5.15.y error
2026/03/15 23:21 5m retest repro linux-5.15.y error
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2023/08/18 22:11 8h33m fix candidate upstream OK (1) job log
2023/06/18 06:19 37m bisect fix linux-5.15.y OK (0) job log log
2023/05/01 03:23 41m bisect fix linux-5.15.y OK (0) job log log

Sample crash report:
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4353 at arch/x86/kvm/vmx/vmx.c:1714 vmx_queue_exception+0x2b9/0x470 arch/x86/kvm/vmx/vmx.c:1714
Modules linked in:
CPU: 0 PID: 4353 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:vmx_queue_exception+0x2b9/0x470 arch/x86/kvm/vmx/vmx.c:1714
Code: 01 00 00 e8 69 70 58 00 eb 0c e8 62 70 58 00 eb 05 e8 5b 70 58 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 47 70 58 00 <0f> 0b e9 a7 fe ff ff 89 f9 80 e1 07 38 c1 0f 8c 6e fd ff ff e8 1e
RSP: 0018:ffffc900031ef630 EFLAGS: 00010293
RAX: ffffffff81209f59 RBX: ffff88807ce80000 RCX: ffff88802c1e1dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8d8b0eef R09: 1ffffffff1b161dd
R10: dffffc0000000000 R11: fffffbfff1b161de R12: ffff88807ce8270c
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000080000800
FS:  0000555583ba0500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31124008 CR3: 000000001e998000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inject_pending_event arch/x86/kvm/x86.c:9185 [inline]
 vcpu_enter_guest+0x836/0x6f70 arch/x86/kvm/x86.c:9908
 vcpu_run arch/x86/kvm/x86.c:10192 [inline]
 kvm_arch_vcpu_ioctl_run+0x804/0x1e40 arch/x86/kvm/x86.c:10432
 kvm_vcpu_ioctl+0x8f2/0xc10 virt/kvm/kvm_main.c:3895
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f56aca19159
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:00007fff93babf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f56acca0fa0 RCX: 00007f56aca19159
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f56acab0024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f56acca0fac R14: 00007f56acca0fa0 R15: 00007f56acca0fa0
 </TASK>

Crashes (216):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/01 03:12 linux-5.15.y 28c35638ec51 316d9396 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/05/21 10:30 linux-5.15.y 93741761e5e3 41b8c833 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/01/24 08:34 linux-5.15.y 9eec9a14ee10 4f25b9b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/10 12:49 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/06/26 06:56 linux-5.15.y 1c700860e8bc 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/03/15 01:33 linux-5.15.y 0c935c049b5c e2826670 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2024/11/11 09:21 linux-5.15.y 3c17fc483905 6b856513 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2024/07/28 02:56 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2024/07/28 02:34 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2024/07/28 02:10 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2024/07/28 01:27 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2024/03/30 21:19 linux-5.15.y 9465fef4ae35 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2023/10/08 21:05 linux-5.15.y 1edcec18cfb7 5e837c76 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2023/03/31 22:03 linux-5.15.y c957cbb87315 f325deb0 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2023/03/26 20:48 linux-5.15.y 115472395b0a fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2023/03/12 23:12 linux-5.15.y bbf9f29bac04 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/22 06:45 linux-5.15.y 792fbe1537d8 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/21 13:23 linux-5.15.y 792fbe1537d8 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/18 09:23 linux-5.15.y 792fbe1537d8 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/17 06:08 linux-5.15.y 792fbe1537d8 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/12 21:03 linux-5.15.y a051a4bf909f 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/11 14:04 linux-5.15.y a051a4bf909f 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/10 01:07 linux-5.15.y a051a4bf909f 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/07 20:58 linux-5.15.y a051a4bf909f 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/07 20:57 linux-5.15.y a051a4bf909f 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/07 18:31 linux-5.15.y a051a4bf909f 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/06 07:03 linux-5.15.y a051a4bf909f f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/06 05:59 linux-5.15.y a051a4bf909f f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/05 02:07 linux-5.15.y a051a4bf909f 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/04 05:01 linux-5.15.y a051a4bf909f 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/10/02 01:10 linux-5.15.y 0248c33e835e f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/09/26 09:20 linux-5.15.y 0248c33e835e a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/09/21 16:40 linux-5.15.y 0248c33e835e 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/09/03 18:59 linux-5.15.y 0996e0926f6b 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/09/01 01:31 linux-5.15.y 28c35638ec51 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/08/26 08:59 linux-5.15.y 945fa863f02c 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/08/16 09:24 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/08/11 20:44 linux-5.15.y aabd761612db 71790083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/22 17:57 linux-5.15.y c86c4726e7f0 4a865b71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/18 18:26 linux-5.15.y c86c4726e7f0 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/06 03:45 linux-5.15.y c86c4726e7f0 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/05 15:15 linux-5.15.y c86c4726e7f0 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/04 04:05 linux-5.15.y eceeec79dbc6 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/03 16:01 linux-5.15.y eceeec79dbc6 58bf2096 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/07/02 23:15 linux-5.15.y eceeec79dbc6 2b70b115 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/06/21 02:52 linux-5.15.y eceeec79dbc6 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/06/11 06:29 linux-5.15.y dc027a595035 b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/06/10 05:39 linux-5.15.y dc027a595035 34dab4be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/05/24 01:48 linux-5.15.y 241d66fa280c c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/05/21 09:48 linux-5.15.y 93741761e5e3 41b8c833 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/30 21:07 linux-5.15.y ef251c45f1cd a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/17 07:42 linux-5.15.y 91d48252ad4b de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/09 10:00 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/07 20:00 linux-5.15.y 91d48252ad4b 628666c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/07 20:00 linux-5.15.y 91d48252ad4b 628666c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/05 00:18 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/03 05:25 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/02 07:46 linux-5.15.y 91d48252ad4b 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/04/01 17:03 linux-5.15.y 91d48252ad4b 9a1f7828 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/03/29 10:27 linux-5.15.y 91d48252ad4b b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2023/03/11 15:11 linux-5.15.y d214f240b0f6 5205ef30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
* Struck through repros no longer work on HEAD.