WARNING in kvm_vcpu_pre_fault

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
1609d67b	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	WARNING in kvm_vcpu_pre_fault_memory	2026/10/04 00:57	2026/10/04 00:57	2026/10/04 01:57	57bbd979

Title	Replies (including bot)	Last reply
[syzbot] [kvm?] WARNING in kvm_vcpu_pre_fault_memory	1 (2)	2026/10/05 03:52

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[syzbot] [kvm?] WARNING in kvm_vcpu_pre_fault_memory

1 (2)

2026/10/05 03:52

------------[ cut here ]------------ r == 0 || r == -EIO WARNING: arch/x86/kvm/../../../virt/kvm/kvm_main.c:4389 at kvm_vcpu_pre_fault_memory+0x45d/0x470 virt/kvm/kvm_main.c:4389, CPU#1: syz-executor267/8523 Modules linked in: CPU: 1 UID: 0 PID: 8523 Comm: syz-executor267 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:kvm_vcpu_pre_fault_memory+0x45d/0x470 virt/kvm/kvm_main.c:4389 Code: fe ff ff e8 85 2e 88 00 90 0f 0b 90 e9 0d ff ff ff e8 77 2e 88 00 e8 42 85 f3 ff eb 8f e8 6b 2e 88 00 eb 05 e8 64 2e 88 00 90 <0f> 0b 90 e9 a7 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 RSP: 0018:ffffc900024dfc28 EFLAGS: 00010293 RAX: ffffffff813fe025 RBX: ffffc900024dfe00 RCX: ffff88807fcc0000 RDX: 0000000000000000 RSI: ffffffff8eaf6510 RDI: fffffffffffffffb RBP: dffffc0000000000 R08: ffff88807fcc0000 R09: 0000000000000002 R10: fffffffffffffffb R11: 0000000000000000 R12: ffffc900024dfe00 R13: ffff88807fcc0000 R14: 1ffff1100ff98000 R15: fffffffffffffffb FS: 00007f9c411186c0(0000) GS:ffff888124dc7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9c4116312d CR3: 0000000026a4a000 CR4: 00000000003526f0 Call Trace: <TASK> kvm_vcpu_ioctl+0x8a6/0xfd0 virt/kvm/kvm_main.c:4668 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9c4118db49 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9c411181d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9c4123bb88 RCX: 00007f9c4118db49 RDX: 0000200000000100 RSI: 00000000c040aed5 RDI: 0000000000000005 RBP: 00007f9c4123bb80 R08: 38203a6b63617473 R09: 38203a6b63617473 R10: 38203a6b63617473 R11: 0000000000000246 R12: 00007f9c4120b858 R13: 0000200000000118 R14: 0000200000000100 R15: 0000200000000600 </TASK>

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/10/03 04:34	upstream	ce1e0223d8ad	57bbd979	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce	WARNING in kvm_vcpu_pre_fault_memory
2026/10/03 03:19	upstream	ce1e0223d8ad	57bbd979	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce	WARNING in kvm_vcpu_pre_fault_memory

Crashes (2):

Assets (help?)