WARNING in x86_emulate

Date	Name	Commit	Repro	Result
2026/03/03	lts (merge base)	ff2177382799	syz	[report] WARNING in x86_emulate_insn
2026/03/03	upstream (ToT)	af4e9ef3d784	syz	[report] WARNING in x86_emulate_insn

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in x86_emulate_insn (2) kvm-x86	-1	C			2	2d12h	115d	0/29	upstream: reported C repro on 2025/11/24 14:40
upstream	WARNING in x86_emulate_insn kvm-x86	-1	C		error	309	2980d	3026d	0/29	closed as invalid on 2019/11/07 10:18

Kernel

Title

Rank 🛈

upstream

WARNING in x86_emulate_insn (2) kvm-x86

-1

2d12h

115d

0/29

upstream: reported C repro on 2025/11/24 14:40

upstream

WARNING in x86_emulate_insn kvm-x86

-1

error

309

2980d

3026d

0/29

closed as invalid on 2019/11/07 10:18

Created	Duration	User	Patch	Repo	Result
2026/03/17 13:18	8m	retest repro		android16-6.12	report log

Created

Duration

User

Patch

Repo

Result

2026/03/17 13:18

retest repro

android16-6.12

report log

------------[ cut here ]------------ WARNING: CPU: 1 PID: 894 at arch/x86/kvm/emulate.c:5392 x86_emulate_insn+0x2919/0x3fe0 arch/x86/kvm/emulate.c:5392 Modules linked in: CPU: 1 UID: 0 PID: 894 Comm: syz.2.174 Not tainted syzkaller #0 a88889f1fd4bd040639a1a4060abea1bc20e1fef Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:x86_emulate_insn+0x2919/0x3fe0 arch/x86/kvm/emulate.c:5392 Code: 8b 36 31 ff 44 89 f6 e8 15 e4 67 00 45 85 f6 0f 84 23 02 00 00 e8 c7 df 67 00 41 be 01 00 00 00 e9 5c db ff ff e8 b7 df 67 00 <0f> 0b 48 8b 45 90 42 80 3c 20 00 74 08 4c 89 ff e8 c2 c1 bf 00 4d RSP: 0018:ffffc90002bff800 EFLAGS: 00010293 RAX: ffffffff811fbfa9 RBX: 000304000010220a RCX: ffff88810bb39300 RDX: 0000000000000000 RSI: 00000000000000ff RDI: 000000000000001f RBP: ffffc90002bff8c0 R08: ffff88810bb39300 R09: 0000000000000002 R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881307f4c90 R14: 00000000000000ff R15: ffff8881307f4c98 FS: 00007f6d3da5c6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000121f4a000 CR4: 00000000003526b0 Call Trace: <TASK> x86_emulate_instruction+0xb5c/0x1a30 arch/x86/kvm/x86.c:9249 kvm_emulate_instruction arch/x86/kvm/x86.c:9331 [inline] complete_emulated_io arch/x86/kvm/x86.c:11459 [inline] complete_emulated_pio+0x64/0x80 arch/x86/kvm/x86.c:11466 kvm_arch_vcpu_ioctl_run+0x13a1/0x1bd0 arch/x86/kvm/x86.c:11637 kvm_vcpu_ioctl+0xa48/0x1000 virt/kvm/kvm_main.c:4515 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0x135/0x1b0 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:47 [inline] do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f6d3cb9c799 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:00007f6d3da5c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d3ce15fa0 RCX: 00007f6d3cb9c799 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00007f6d3cc32bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6d3ce16038 R14: 00007f6d3ce15fa0 R15: 00007fff2474c538 </TASK> ---[ end trace 0000000000000000 ]---

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/03 07:33	android16-6.12	a57a57875c30	28b83e23	.config	console log	report	syz / log			[disk image] [vmlinux] [kernel image]	ci2-android-6-12-rust	WARNING in x86_emulate_insn

Crashes (1):

Assets (help?)