kvm: pic: non byte write
------------[ cut here ]------------
WARNING: arch/x86/kvm/x86.c:11592 at vcpu_block arch/x86/kvm/x86.c:11592 [inline], CPU#1: syz.0.3765/17784
WARNING: arch/x86/kvm/x86.c:11592 at vcpu_run+0x1bff/0x5a80 arch/x86/kvm/x86.c:11634, CPU#1: syz.0.3765/17784
Modules linked in:
CPU: 1 UID: 0 PID: 17784 Comm: syz.0.3765 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:vcpu_block arch/x86/kvm/x86.c:11592 [inline]
RIP: 0010:vcpu_run+0x1bff/0x5a80 arch/x86/kvm/x86.c:11634
Code: c7 e8 d5 1f 7d 00 be 08 00 00 00 4c 89 f7 e8 58 f5 e6 00 f0 41 80 67 38 fd 41 bd fb ff ff ff e9 9e fa ff ff e8 b2 1f 7d 00 90 <0f> 0b 90 e9 5d ff ff ff e8 a4 1f 7d 00 e9 9c f6 ff ff e8 9a 1f 7d
RSP: 0018:ffffc900063e7a80 EFLAGS: 00010283
RAX: 0000000000000891 RBX: ffff888050c4c290 RCX: ffffc900303f6000
RDX: 0000000000080000 RSI: ffffffff8141c40e RDI: 0000000000000005
RBP: ffffc900063e7c10 R08: 0000000000000005 R09: 00000000fffffff0
R10: 00000000fffffff0 R11: ffff88802e14aff0 R12: dffffc0000000000
R13: 00000000fffffff0 R14: ffff888050c4a940 R15: ffff888050c4a978
FS:  00007ff05ddab6c0(0000) GS:ffff8880d69fd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005cbf7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kvm_arch_vcpu_ioctl_run+0xfd3/0x1860 arch/x86/kvm/x86.c:11977
 kvm_vcpu_ioctl+0x76d/0x16d0 virt/kvm/kvm_main.c:4477
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff05cf8f7c9
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:00007ff05ddab038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff05d1e5fa0 RCX: 00007ff05cf8f7c9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007ff05d013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff05d1e6038 R14: 00007ff05d1e5fa0 R15: 00007ffd89f70618
 </TASK>