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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: 1035d, last: 3d04h
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 1414d 1476d 20/29 fixed on 2022/03/08 16:11
upstream WARNING in vmx_queue_exception (2) kvm-x86 -1 C 5 1350d 1349d 22/29 fixed on 2023/02/24 13:50
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/01/04 20:12 11m retest repro linux-5.15.y report log
2026/01/04 20:12 51m retest repro linux-5.15.y report log
2026/01/04 20:12 12m retest repro linux-5.15.y report log
2026/01/04 20:12 13m retest repro linux-5.15.y report log
2026/01/04 20:12 10m retest repro linux-5.15.y report log
2025/11/13 12:06 11m retest repro linux-5.15.y report log
2025/11/13 12:06 12m retest repro linux-5.15.y report log
2025/11/13 12:06 13m retest repro linux-5.15.y report log
2025/11/13 12:06 10m retest repro linux-5.15.y report log
2025/11/13 12:06 14m retest repro linux-5.15.y report log
▶ ▼ 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: 0 PID: 4332 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: 4332 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:vmx_queue_exception+0x2b9/0x470 arch/x86/kvm/vmx/vmx.c:1714
Code: 01 00 00 e8 89 96 57 00 eb 0c e8 82 96 57 00 eb 05 e8 7b 96 57 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 67 96 57 00 <0f> 0b e9 a7 fe ff ff 89 f9 80 e1 07 38 c1 0f 8c 6e fd ff ff e8 2e
RSP: 0018:ffffc90002faf590 EFLAGS: 00010293
RAX: ffffffff812033e9 RBX: ffff888028024000 RCX: ffff88801d13bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ad32b6
R10: fffffbfff1ad32b6 R11: 1ffffffff1ad32b5 R12: ffff8880280266fc
R13: dffffc0000000000 R14: 000000000000000e R15: 000000008000080e
FS:  000055558be30500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffff CR3: 0000000017f92000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inject_pending_event arch/x86/kvm/x86.c:9167 [inline]
 vcpu_enter_guest+0x844/0x7110 arch/x86/kvm/x86.c:9890
 vcpu_run arch/x86/kvm/x86.c:10174 [inline]
 kvm_arch_vcpu_ioctl_run+0xdea/0x1f40 arch/x86/kvm/x86.c:10411
 kvm_vcpu_ioctl+0x887/0xb80 virt/kvm/kvm_main.c:3894
 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: 0033:0x7f5cb8090ec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe38f84518 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5cb82e7fa0 RCX: 00007f5cb8090ec9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f5cb8113f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5cb82e7fa0 R14: 00007f5cb82e7fa0 R15: 0000000000000003
 </TASK>

Crashes (122):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/01/07 11:04 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2026/01/06 00:17 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/12/21 14:26 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/12/19 07:35 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/12/08 14:13 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/12/06 13:20 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/11/30 05:00 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/11/27 05:51 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/11/21 13:31 linux-5.15.y cc5ec8769306 280ea308 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/30 07:24 linux-5.15.y cc5ec8769306 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/30 01:27 linux-5.15.y cc5ec8769306 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/29 05:30 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/20 01:40 linux-5.15.y ac56c046adf4 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/13 21:44 linux-5.15.y 29e53a5b1c4f b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/12 11:24 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/10 07:55 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/10/03 18:55 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/09/06 16:05 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/09/05 11:37 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/09/04 23:29 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/09/01 01:59 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/08/26 14:27 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/08/26 09:46 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/08/14 02:02 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/08/10 07:17 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/07/22 07:20 linux-5.15.y c79648372d02 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/07/22 06:07 linux-5.15.y c79648372d02 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/07/12 17:24 linux-5.15.y 2f693b607545 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/07/10 13:28 linux-5.15.y 3dea0e7f549e 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/07/01 01:27 linux-5.15.y 3dea0e7f549e 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/06/28 12:23 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/06/28 09:35 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/06/26 06:25 linux-5.15.y 1c700860e8bc 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/06/03 15:26 linux-5.15.y 98f47d0e9b8c a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/06/01 21:35 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/05/14 09:03 linux-5.15.y 3b8db0e4f263 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/30 09:51 linux-5.15.y f7347f400572 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/29 10:04 linux-5.15.y f7347f400572 aeb6ec69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/20 08:20 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/20 03:10 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/19 20:39 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/07 09:21 linux-5.15.y 0c935c049b5c 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in vmx_queue_exception
2025/04/07 09:21 linux-5.15.y 0c935c049b5c 1c65791e .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.