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WARNING in kvm_arch_vcpu_ioctl_run

Status: upstream: reported C repro on 2023/04/09 03:02
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+412c9ae97b4338c5187e@syzkaller.appspotmail.com
First crash: 879d, last: 7h27m
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
Re: [v5.15] WARNING in kvm_arch_vcpu_ioctl_run 1 (1) 2024/01/10 05:09
Re: [v5.15] WARNING in kvm_arch_vcpu_ioctl_run 1 (1) 2023/11/27 08:40
Re: [v5.15] WARNING in kvm_arch_vcpu_ioctl_run 3 (3) 2023/08/28 15:23
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/05/12 linux-5.15.y (ToT) b0ece631f84a C [report] WARNING in kvm_arch_vcpu_ioctl_run
2023/05/12 upstream (ToT) cc3c44c9fda2 C Didn't crash
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kvm_arch_vcpu_ioctl_run (5) kvm-x86 -1 C error 343 726d 814d 23/29 fixed on 2023/10/12 12:47
upstream WARNING in kvm_arch_vcpu_ioctl_run (4) kvm-x86 -1 C error 288 818d 902d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in kvm_arch_vcpu_ioctl_run (2) kvm-x86 -1 C 61018 2774d 2863d 4/29 fixed on 2018/03/13 09:44
upstream WARNING in kvm_arch_vcpu_ioctl_run (6) kvm-x86 -1 C 82 10d 48d 2/29 upstream: reported C repro on 2025/07/17 14:50
upstream WARNING in kvm_arch_vcpu_ioctl_run -1 C 20284 2900d 2965d 3/29 fixed on 2017/09/26 01:38
linux-4.14 WARNING in kvm_arch_vcpu_ioctl_run -1 C inconclusive 71 1085d 2262d 0/1 upstream: reported C repro on 2019/06/25 23:07
upstream WARNING in kvm_arch_vcpu_ioctl_run (3) kvm-x86 -1 C done error 16157 923d 2716d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in kvm_arch_vcpu_ioctl_run -1 C error 116 995d 2270d 0/1 upstream: reported C repro on 2019/06/17 10:07
android-6-12 WARNING in kvm_arch_vcpu_ioctl_run origin:upstream -1 C 37 2d07h 49d 0/1 premoderation: reported C repro on 2025/07/17 01:43
linux-6.1 WARNING in kvm_arch_vcpu_ioctl_run origin:lts-only -1 C done 598 9h11m 895d 0/3 upstream: reported C repro on 2023/03/23 13:22
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/01/10 23:47 1h01m fix candidate upstream OK (0) job 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: 4504 at arch/x86/kvm/x86.c:10351 kvm_arch_vcpu_ioctl_run+0x1bc4/0x1f40 arch/x86/kvm/x86.c:10351
Modules linked in:
CPU: 0 PID: 4504 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1bc4/0x1f40 arch/x86/kvm/x86.c:10351
Code: e8 01 41 ad 00 e9 03 e9 ff ff 44 89 f9 80 e1 07 38 c1 0f 8c d5 ed ff ff 4c 89 ff e8 e6 40 ad 00 e9 c8 ed ff ff e8 dc da 68 00 <0f> 0b e9 31 fd ff ff 44 89 f9 80 e1 07 38 c1 0f 8c d2 ed ff ff 4c
RSP: 0018:ffffc900032ffc30 EFLAGS: 00010293
RAX: ffffffff810eefd4 RBX: ffff88807b254000 RCX: ffff88801d093b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807b254000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ad3196
R10: fffffbfff1ad3196 R11: 1ffffffff1ad3195 R12: ffff88806f9a6001
R13: 1ffff1100f64a81e R14: ffff88807b2540f0 R15: ffff88806f9a6000
FS:  00005555951ff500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005649a7ef7950 CR3: 000000007d72f000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 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: 0033:0x7fd10d526be9
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:00007fff4623cb48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd10d75dfa0 RCX: 00007fd10d526be9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fd10d5a9e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd10d75dfa0 R14: 00007fd10d75dfa0 R15: 0000000000000003
 </TASK>

Crashes (1033):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/02 09:07 linux-5.15.y 01879f56bdde 807a3b61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/05/25 07:14 linux-5.15.y 98f47d0e9b8c ed351ea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/02/23 13:49 linux-5.15.y c16c81c81336 d34966d1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2024/11/09 12:48 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 kvm_arch_vcpu_ioctl_run
2024/07/31 15:25 linux-5.15.y 7e89efd3ae1c 6fde257d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2024/04/20 08:50 linux-5.15.y c52b9710c83d af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2024/01/11 05:40 linux-5.15.y 26c690eff0a5 04815ef1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2023/05/05 08:28 linux-5.15.y 8a7f2a5c5aa1 518a39a6 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2023/07/12 12:11 linux-5.15.y d54cfc420586 2f19aa4f .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2023/06/25 11:58 linux-5.15.y f67653019430 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2023/05/29 11:21 linux-5.15.y 1fe619a7d252 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2023/05/15 00:06 linux-5.15.y b0ece631f84a 2b9ba477 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/03 19:53 linux-5.15.y 01879f56bdde 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/03 17:08 linux-5.15.y 01879f56bdde 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/03 10:00 linux-5.15.y 01879f56bdde 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/02 10:36 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/02 08:27 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/02 05:21 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/01 21:59 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/01 21:58 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/01 13:53 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/01 01:09 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/31 09:30 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/31 08:18 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/30 23:21 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/29 05:04 linux-5.15.y 01879f56bdde d401b9d7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/28 13:55 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/28 06:35 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/28 00:32 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/27 19:24 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/27 03:34 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/23 19:37 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/22 18:09 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/22 18:08 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/21 20:48 linux-5.15.y c79648372d02 3e79b825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/21 10:30 linux-5.15.y c79648372d02 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/20 14:13 linux-5.15.y c79648372d02 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/20 08:30 linux-5.15.y c79648372d02 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/18 19:37 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/17 13:50 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/17 12:11 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/17 08:11 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/15 23:06 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/15 13:31 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/15 01:18 linux-5.15.y c79648372d02 5d8c2ac2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/15 01:18 linux-5.15.y c79648372d02 5d8c2ac2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/13 22:25 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/13 03:22 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/11 06:29 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/10 13:09 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/10 07:20 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/09 23:20 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/08 06:49 linux-5.15.y c79648372d02 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/07 02:54 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/08/06 08:14 linux-5.15.y c79648372d02 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2023/04/09 03:02 linux-5.15.y d86dfc4d95cd 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
* Struck through repros no longer work on HEAD.