syzbot


WARNING in kvm_arch_vcpu_ioctl_run

Status: premoderation: reported C repro on 2025/07/17 01:43
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+96aad9f42a04751b9fa2@syzkaller.appspotmail.com
First crash: 5d16h, last: 1d08h
Bug presence (2)
Date Name Commit Repro Result
2025/07/17 lts (merge base) e0e2f7824338 C [report] WARNING in kvm_arch_vcpu_ioctl_run
2025/07/17 upstream (ToT) e2291551827f C [report] WARNING in kvm_arch_vcpu_ioctl_run
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 -1 C error 343 683d 770d 23/29 fixed on 2023/10/12 12:47
upstream WARNING in kvm_arch_vcpu_ioctl_run (4) kvm -1 C error 288 775d 858d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in kvm_arch_vcpu_ioctl_run (2) kvm -1 C 61018 2731d 2819d 4/29 fixed on 2018/03/13 09:44
upstream WARNING in kvm_arch_vcpu_ioctl_run (6) kvm-x86 -1 C 24 5h55m 5d03h 0/29 upstream: reported C repro on 2025/07/17 14:50
upstream WARNING in kvm_arch_vcpu_ioctl_run -1 C 20284 2856d 2921d 3/29 fixed on 2017/09/26 01:38
linux-4.14 WARNING in kvm_arch_vcpu_ioctl_run -1 C inconclusive 71 1042d 2218d 0/1 upstream: reported C repro on 2019/06/25 23:07
upstream WARNING in kvm_arch_vcpu_ioctl_run (3) kvm -1 C done error 16157 879d 2673d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in kvm_arch_vcpu_ioctl_run -1 C error 116 951d 2227d 0/1 upstream: reported C repro on 2019/06/17 10:07
linux-5.15 WARNING in kvm_arch_vcpu_ioctl_run origin:lts-only -1 C inconclusive 947 11h55m 835d 0/3 upstream: reported C repro on 2023/04/09 03:02
linux-6.1 WARNING in kvm_arch_vcpu_ioctl_run origin:lts-only -1 C done 523 10h31m 852d 0/3 upstream: reported C repro on 2023/03/23 13:22

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 296 at arch/x86/kvm/x86.c:11569 kvm_arch_vcpu_ioctl_run+0x12af/0x1aa0 arch/x86/kvm/x86.c:11569
Modules linked in:
CPU: 1 UID: 0 PID: 296 Comm: syz-executor266 Not tainted 6.12.30-syzkaller-g73009db42b37 #0 e78244f41b0e2dd383d6ada64249d7f830c3c2f3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x12af/0x1aa0 arch/x86/kvm/x86.c:11569
Code: 7e 3b e8 04 e6 69 00 49 bd 00 00 00 00 00 fc ff df 4c 8b 7c 24 20 4c 8b 64 24 40 48 8b 5c 24 28 e9 26 fd ff ff e8 e1 e5 69 00 <0f> 0b e9 e4 fc ff ff e8 d5 e5 69 00 0f 0b e9 0e fd ff ff e8 c9 e5
RSP: 0018:ffffc9000116f9c0 EFLAGS: 00010293
RAX: ffffffff811bc51f RBX: ffff888104f40000 RCX: ffff88812063a600
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000116fc70 R08: ffff88812063a607 R09: 1ffff110240c74c0
R10: dffffc0000000000 R11: ffffed10240c74c1 R12: ffff88810ba68000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff888104f40078
FS:  000055558c27b380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000005200000c CR3: 00000001261cc000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_vcpu_ioctl+0x96f/0xee0 virt/kvm/kvm_main.c:4511
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff9359d2439
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd439bc8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffd439bcac8 RCX: 00007ff9359d2439
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007ff935a45610 R08: 00000000836f3000 R09: 00000000836f3000
R10: 00000000836f3000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd439bcab8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
---[ end trace 0000000000000000 ]---

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/19 17:57 android16-6.12 73009db42b37 7117feec .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_arch_vcpu_ioctl_run
2025/07/17 01:42 android16-6.12 3bff0858a069 44f8051e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_arch_vcpu_ioctl_run
2025/07/21 09:49 android16-6.12 73009db42b37 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 13:41 android16-6.12 73009db42b37 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_arch_vcpu_ioctl_run
* Struck through repros no longer work on HEAD.