syzbot


WARNING in kvm_arch_vcpu_ioctl_run (6)

Status: upstream: reported C repro on 2025/07/17 14:50
Subsystems: kvm-x86
[Documentation on labels]
Reported-by: syzbot+cc2032ba16cc2018ca25@syzkaller.appspotmail.com
First crash: 7d09h, last: 18h55m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [kvm-x86?] WARNING in kvm_arch_vcpu_ioctl_run (6) 1 (2) 2025/07/17 14:53
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 684d 772d 23/29 fixed on 2023/10/12 12:47
upstream WARNING in kvm_arch_vcpu_ioctl_run (4) kvm-x86 -1 C error 288 777d 860d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in kvm_arch_vcpu_ioctl_run (2) kvm-x86 -1 C 61018 2732d 2821d 4/29 fixed on 2018/03/13 09:44
upstream WARNING in kvm_arch_vcpu_ioctl_run -1 C 20284 2858d 2923d 3/29 fixed on 2017/09/26 01:38
linux-4.14 WARNING in kvm_arch_vcpu_ioctl_run -1 C inconclusive 71 1044d 2220d 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 881d 2675d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in kvm_arch_vcpu_ioctl_run -1 C error 116 953d 2228d 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 2d02h 837d 0/3 upstream: reported C repro on 2023/04/09 03:02
android-6-12 WARNING in kvm_arch_vcpu_ioctl_run origin:upstream -1 C 4 2d22h 7d06h 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 523 2d00h 853d 0/3 upstream: reported C repro on 2023/03/23 13:22

Sample crash report:
WARNING: CPU: 1 PID: 6108 at arch/x86/kvm/x86.c:11645 kvm_arch_vcpu_ioctl_run+0x13bc/0x18c0 arch/x86/kvm/x86.c:11645
Modules linked in:
CPU: 1 UID: 0 PID: 6108 Comm: syz.0.16 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x13bc/0x18c0 arch/x86/kvm/x86.c:11645
Code: 0a 00 00 00 00 00 00 e8 25 88 be 1e 31 ff 89 c5 89 c6 e8 e7 68 7a 00 85 ed 0f 8f f4 f0 ff ff e9 f5 f1 ff ff e8 95 6d 7a 00 90 <0f> 0b 90 e9 9c f0 ff ff e8 87 6d 7a 00 90 0f 0b 90 e9 d3 f0 ff ff
RSP: 0018:ffffc9000379fc38 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888044358000 RCX: ffffffff81417587
RDX: ffff88802327a440 RSI: ffffffff814184eb RDI: 0000000000000007
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804ff02000
R13: ffff8880443580d8 R14: 0000000000000000 R15: ffff88804ff02120
FS:  000055555f07c500(0000) GS:ffff8880d6813000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000005200000c CR3: 0000000033cb3000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kvm_vcpu_ioctl+0x5eb/0x1690 virt/kvm/kvm_main.c:4464
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f8b18e929
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:00007ffdc1bf8098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4f8b3b5fa0 RCX: 00007f4f8b18e929
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f4f8b210ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f8b3b5fa0 R14: 00007f4f8b3b5fa0 R15: 0000000000000003
 </TASK>

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/16 23:37 upstream 155a3c003e55 44f8051e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/16 23:13 upstream 155a3c003e55 44f8051e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/22 12:26 linux-next d086c886ceb9 1555463b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
2025/07/23 13:37 upstream 89be9a83ccf1 e0b9ac93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/23 09:38 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/23 06:32 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/23 00:46 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/22 10:48 upstream 89be9a83ccf1 1555463b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/22 04:26 upstream 89be9a83ccf1 1555463b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/21 15:39 upstream 89be9a83ccf1 56d87229 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/21 09:05 upstream 89be9a83ccf1 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/21 04:47 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/21 00:39 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 23:40 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 23:00 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 20:48 upstream 990b11a523a8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 11:29 upstream f4a40a4282f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 08:34 upstream f4a40a4282f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 06:31 upstream f4a40a4282f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/20 00:35 upstream 4871b7cb27f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/19 17:36 upstream 4871b7cb27f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/19 16:09 upstream 4871b7cb27f4 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/19 10:52 upstream c7de79e662b8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/19 08:36 upstream c7de79e662b8 7117feec .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/18 21:29 upstream 6832a9317eee f550e092 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/17 13:11 upstream e2291551827f 89164500 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/17 07:52 upstream e2291551827f 44f8051e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/16 22:46 upstream 155a3c003e55 44f8051e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
* Struck through repros no longer work on HEAD.