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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: 1116d, last: 7h30m
▶ ▼ 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 (11)
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 964d 1051d 23/29 fixed on 2023/10/12 12:47
upstream WARNING in kvm_arch_vcpu_ioctl_run (4) kvm-x86 -1 C error 288 1056d 1140d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in kvm_arch_vcpu_ioctl_run (2) kvm-x86 -1 C 61018 3012d 3101d 4/29 fixed on 2018/03/13 09:44
linux-6.6 WARNING in kvm_arch_vcpu_ioctl_run origin:upstream -1 C done 2 228d 228d 2/2 fixed on 2025/10/19 16:15
upstream WARNING in kvm_arch_vcpu_ioctl_run (6) kvm-x86 -1 C 117 205d 286d 29/29 fixed on 2025/10/29 21:02
upstream WARNING in kvm_arch_vcpu_ioctl_run -1 C 20284 3137d 3202d 3/29 fixed on 2017/09/26 01:38
linux-4.14 WARNING in kvm_arch_vcpu_ioctl_run -1 C inconclusive 71 1323d 2499d 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 1161d 2954d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in kvm_arch_vcpu_ioctl_run -1 C error 116 1232d 2508d 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 51 185d 286d 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 1419 7h06m 1133d 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:
kvm: vcpu 3: requested lapic timer restore with starting count register 0x390=1812281087 (231971979136 ns) > initial count (200000 ns). Using initial count to start timer.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4339 at arch/x86/kvm/x86.c:10372 kvm_arch_vcpu_ioctl_run+0x1bc4/0x1f40 arch/x86/kvm/x86.c:10372
Modules linked in:
CPU: 1 PID: 4339 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x1bc4/0x1f40 arch/x86/kvm/x86.c:10372
Code: e8 b1 f1 ae 00 e9 03 e9 ff ff 44 89 f9 80 e1 07 38 c1 0f 8c d5 ed ff ff 4c 89 ff e8 96 f1 ae 00 e9 c8 ed ff ff e8 5c e6 69 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:ffffc900047b7c30 EFLAGS: 00010293
RAX: ffffffff810f3ab4 RBX: ffff88805c6c4000 RCX: ffff888020e50000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88805c6c4000
RBP: 0000000000000000 R08: ffffffff8d89e36f R09: 1ffffffff1b13c6d
R10: dffffc0000000000 R11: fffffbfff1b13c6e R12: ffff88802c2be001
R13: 1ffff1100b8d881e R14: ffff88805c6c40f0 R15: ffff88802c2be000
FS:  00005555576bc500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000fe9008 CR3: 0000000074c3a000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_vcpu_ioctl+0x8f7/0xc10 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: 0033:0x7f06b3665819
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:00007ffc66bdf978 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f06b38defa0 RCX: 00007f06b3665819
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f06b36fbc91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f06b38defac R14: 00007f06b38defa0 R15: 00007f06b38defa0
 </TASK>

Crashes (1804):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/04 12:54 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/03/22 11:34 linux-5.15.y 91d48252ad4b 5b92003d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/12/11 15:00 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2025/09/02 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
2026/04/29 13:51 linux-5.15.y b9d57c40a767 7ca9e4d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/28 13:29 linux-5.15.y b9d57c40a767 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/28 12:24 linux-5.15.y b9d57c40a767 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/27 17:07 linux-5.15.y b9d57c40a767 0f700595 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/27 17:01 linux-5.15.y b9d57c40a767 0f700595 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/27 08:20 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/27 00:30 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/26 14:08 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/26 08:36 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/26 06:41 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/25 05:51 linux-5.15.y b9d57c40a767 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/23 17:20 linux-5.15.y b9d57c40a767 4c3406dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/23 05:36 linux-5.15.y b9d57c40a767 b10da5ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/22 17:51 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/22 17:51 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/22 13:42 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/22 08:26 linux-5.15.y b9d57c40a767 0b6ab7ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/21 12:14 linux-5.15.y b9d57c40a767 3f2e655b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/21 10:44 linux-5.15.y b9d57c40a767 3f2e655b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/20 22:34 linux-5.15.y b9d57c40a767 e65da4ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/19 16:27 linux-5.15.y b9d57c40a767 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/19 02:13 linux-5.15.y b9d57c40a767 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/18 14:11 linux-5.15.y b9d57c40a767 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/17 21:24 linux-5.15.y 91d48252ad4b 24ecfc1e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/17 09:43 linux-5.15.y 91d48252ad4b de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/17 06:26 linux-5.15.y 91d48252ad4b de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/17 05:18 linux-5.15.y 91d48252ad4b de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/17 03:44 linux-5.15.y 91d48252ad4b de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/16 18:40 linux-5.15.y 91d48252ad4b 4743f87d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/15 20:03 linux-5.15.y 91d48252ad4b c441f497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/15 10:25 linux-5.15.y 91d48252ad4b e2e976a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/14 08:37 linux-5.15.y 91d48252ad4b 1a086e7c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/12 18:46 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/11 18:33 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/11 01:05 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/10 03:12 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/09 11:29 linux-5.15.y 91d48252ad4b 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/08 23:15 linux-5.15.y 91d48252ad4b d9b7f621 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/08 20:32 linux-5.15.y 91d48252ad4b d9b7f621 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/08 06:08 linux-5.15.y 91d48252ad4b 2c961e87 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/08 04:49 linux-5.15.y 91d48252ad4b 2c961e87 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/07 04:16 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/06 10:40 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/06 04:30 linux-5.15.y 91d48252ad4b 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in kvm_arch_vcpu_ioctl_run
2026/04/06 02:03 linux-5.15.y 91d48252ad4b 4440e7c2 .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.