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: 21d, last: 1d20h
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-x86 -1 C error 343 698d 786d 23/29 fixed on 2023/10/12 12:47
upstream WARNING in kvm_arch_vcpu_ioctl_run (4) kvm-x86 -1 C error 288 790d 874d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in kvm_arch_vcpu_ioctl_run (2) kvm-x86 -1 C 61018 2746d 2835d 4/29 fixed on 2018/03/13 09:44
upstream WARNING in kvm_arch_vcpu_ioctl_run (6) kvm-x86 -1 C 40 1d11h 20d 0/29 upstream: reported C repro on 2025/07/17 14:50
upstream WARNING in kvm_arch_vcpu_ioctl_run -1 C 20284 2872d 2937d 3/29 fixed on 2017/09/26 01:38
linux-4.14 WARNING in kvm_arch_vcpu_ioctl_run -1 C inconclusive 71 1057d 2234d 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 895d 2688d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in kvm_arch_vcpu_ioctl_run -1 C error 116 967d 2242d 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 970 43m 851d 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 537 5d22h 867d 0/3 upstream: reported C repro on 2023/03/23 13:22

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3300 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: 3300 Comm: syz-executor772 Not tainted 6.12.38-syzkaller-ge9bbc29c066a #0 23782410f292bc05d82a7d68d5e797d6f188417b
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 f4 02 6a 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 d1 02 6a 00 <0f> 0b e9 e4 fc ff ff e8 c5 02 6a 00 0f 0b e9 0e fd ff ff e8 b9 02
RSP: 0018:ffffc900025879c0 EFLAGS: 00010293
RAX: ffffffff811bc81f RBX: ffff88812e644300 RCX: ffff888118d01300
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002587c70 R08: ffff888118d01307 R09: 1ffff110231a0260
R10: dffffc0000000000 R11: ffffed10231a0261 R12: ffff88811c013000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88812e644378
FS:  00007fc37fe406c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000005200000c CR3: 000000010ff6a000 CR4: 00000000003526b0
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: 0033:0x7fc37feb6599
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc37fe40218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc37ff40358 RCX: 00007fc37feb6599
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fc37ff40350 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000836f3000 R11: 0000000000000246 R12: 00007fc37ff0d100
R13: 0000200000000270 R14: 0000200000000240 R15: 0000200000fe8000
 </TASK>
---[ end trace 0000000000000000 ]---

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/28 02:56 android16-6.12 e9bbc29c066a fb8f743d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_arch_vcpu_ioctl_run
2025/07/19 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
2025/08/05 07:05 android16-6.12 1ccd114e35d8 f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in kvm_arch_vcpu_ioctl_run
2025/08/03 23:33 android16-6.12 bf0fb8bb181b 7368264b .config console log report info [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.