program: r0 = openat$comedi(0xffffff9c, &(0x7f0000000040)='/dev/comedi3\x00', 0x2000, 0x0) ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000140)={'8255\x00', [0xfffffffb, 0x2167, 0x2, 0x7b, 0xffffffff, 0x8f, 0xfffffffd, 0x10, 0x2, 0xffffffff, 0x200, 0xfff, 0x344, 0x1, 0x0, 0x200, 0x9, 0x3, 0x81, 0xe, 0x0, 0x0, 0x80, 0x7ff, 0x1, 0xffffffff, 0xb0c4, 0x7df, 0x8, 0xf3, 0x1]}) r1 = socket$inet(0x2, 0x4000000000000001, 0x0) (async) r2 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000180), 0x2, 0x0) r3 = ioctl$KVM_CREATE_VM(r2, 0xae01, 0x0) r4 = ioctl$KVM_CREATE_VCPU(r3, 0xae41, 0x2) syz_kvm_setup_cpu$x86(0xffffffffffffffff, r4, &(0x7f0000fe6000/0x18000)=nil, &(0x7f00000001c0)=[@text64={0x40, 0x0}], 0x1, 0x1, 0x0, 0x0) ioctl$KVM_SET_XCRS(r4, 0x4188aea7, &(0x7f0000000040)={0x1, 0x0, [{0x0, 0x0, 0x81}]}) (async) prctl$PR_SET_MM_MAP(0x23, 0xe, &(0x7f0000000080)={&(0x7f0000ff0000/0x1000)=nil, &(0x7f0000ffd000/0x3000)=nil, &(0x7f0000ffc000/0x4000)=nil, &(0x7f0000ffc000/0x4000)=nil, &(0x7f0000ff8000/0x4000)=nil, &(0x7f0000ff8000/0x3000)=nil, &(0x7f0000ffb000/0x3000)=nil, &(0x7f0000ffb000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, &(0x7f0000ffa000/0x1000)=nil, &(0x7f0000ffa000/0x2000)=nil, 0x0}, 0x68) (async) socket$xdp(0x2c, 0x3, 0x0) (async) sendmsg$NFT_BATCH(0xffffffffffffffff, &(0x7f0000000080)={0x0, 0x0, 0x0}, 0x24004045) r5 = syz_open_dev$vim2m(&(0x7f0000000140), 0x0, 0x2) ioctl$vim2m_VIDIOC_EXPBUF(r5, 0xc0405668, &(0x7f0000000100)={0x0, 0x0, 0xc}) (async, rerun: 32) r6 = io_uring_setup(0x1b7b, &(0x7f0000000040)={0x0, 0x151, 0xc000, 0x0, 0x20002f7}) (rerun: 32) r7 = socket$inet(0x2, 0x80001, 0x84) getsockopt$inet_sctp_SCTP_MAX_BURST(r7, 0x84, 0x14, &(0x7f0000000000)=@assoc_value, &(0x7f0000000300)=0x8) (async) getsockopt$inet_tcp_buf(r1, 0x6, 0x499578796023dd77, &(0x7f0000000340)=""/4096, &(0x7f0000000200)=0x1000) (async) ioctl$VIDIOC_TRY_FMT(0xffffffffffffffff, 0xc0d05640, &(0x7f0000000000)={0xd, @vbi={0x0, 0x0, 0x0, 0x4745504d, [], [0xfffffffe]}}) (async) io_uring_enter(r6, 0x2219, 0x7721, 0x16, 0x0, 0x0) (async) ioctl$COMEDI_CHANINFO(r0, 0x80306403, &(0x7f0000000080)={0x9, &(0x7f0000000200), 0x0, 0x0}) (async) r8 = openat$nvram(0xffffffffffffff9c, &(0x7f0000000240), 0x800, 0x0) openat$cgroup_ro(r8, &(0x7f0000000280)='cpuset.memory_pressure_enabled\x00', 0x0, 0x0) [ 75.064018][ T46] Bluetooth: hci0: command tx timeout [ 75.147799][ T5340] comedi comedi3: 8255: I/O port conflict (0xfffffffffffffffb,4) [ 75.165177][ T5340] comedi comedi3: 8255: I/O port conflict (0x2,4) [ 75.168340][ T5340] comedi comedi3: 8255: I/O port conflict (0xffffffffffffffff,4) [ 75.199214][ T5340] comedi comedi3: 8255: I/O port conflict (0x8f,4) [ 75.201900][ T5340] comedi comedi3: 8255: I/O port conflict (0xfffffffffffffffd,4) [ 75.205179][ T5340] comedi comedi3: 8255: I/O port conflict (0x10,4) [ 75.212922][ T5340] comedi comedi3: 8255: I/O port conflict (0x2,4) [ 75.219634][ T5340] comedi comedi3: 8255: I/O port conflict (0xffffffffffffffff,4) [ 75.231689][ T5340] BUG: unable to handle page fault for address: ffffffffffffff91 [ 75.235019][ T5340] #PF: supervisor write access in kernel mode [ 75.237578][ T5340] #PF: error_code(0x0002) - not-present page [ 75.240149][ T5340] PGD dd3f067 P4D dd3f067 PUD dd41067 PMD 0 [ 75.242738][ T5340] Oops: Oops: 0002 [#1] SMP KASAN NOPTI [ 75.245023][ T5340] CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 75.248340][ T5340] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 75.252457][ T5340] RIP: 0010:subdev_8255_io+0x64/0xb0 [ 75.254606][ T5340] Code: e8 f1 83 fd f8 49 81 c6 d0 01 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 94 21 65 f9 01 eb 41 03 1e 44 89 f8 <89> 66 90 31 c0 eb 2d e8 c0 83 fd f8 49 81 c6 d0 01 00 00 4c 89 f0 [ 75.262614][ T5340] RSP: 0018:ffffc9000d4bf9c0 EFLAGS: 00010206 [ 75.265177][ T5340] RAX: 000000000000009b RBX: 0000000000000203 RCX: ffff888000af4980 [ 75.268456][ T5340] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 75.271829][ T5340] RBP: 0000000000000003 R08: 0000000000000200 R09: 00000000ffffffff [ 75.275099][ T5340] R10: 000000000000000b R11: ffffffff88c3d6f0 R12: 0000000000000001 [ 75.278379][ T5340] R13: dffffc0000000000 R14: ffff88803e71d1d0 R15: 000000000000009b [ 75.281648][ T5340] FS: 00007f795bdf56c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000 [ 75.285360][ T5340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.288054][ T5340] CR2: ffffffffffffff91 CR3: 0000000010eb7000 CR4: 0000000000352ef0 [ 75.291391][ T5340] Call Trace: [ 75.292880][ T5340] [ 75.294154][ T5340] subdev_8255_io_init+0x27c/0x330 [ 75.296320][ T5340] dev_8255_attach+0x9bd/0xe90 [ 75.298349][ T5340] comedi_device_attach+0x51f/0x720 [ 75.300258][ T5340] comedi_unlocked_ioctl+0x5ff/0x1020 [ 75.302445][ T5340] ? kasan_quarantine_put+0xdd/0x220 [ 75.304778][ T5340] ? lockdep_hardirqs_on+0x98/0x140 [ 75.307026][ T5340] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 75.309574][ T5340] ? do_futex+0x333/0x420 [ 75.311501][ T5340] ? __fget_files+0x2a/0x420 [ 75.313645][ T5340] ? __fget_files+0x3a0/0x420 [ 75.315720][ T5340] ? __fget_files+0x2a/0x420 [ 75.317745][ T5340] ? bpf_lsm_file_ioctl+0x9/0x20 [ 75.319902][ T5340] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 75.322463][ T5340] __se_sys_ioctl+0xfc/0x170 [ 75.324560][ T5340] do_syscall_64+0xfa/0xf80 [ 75.326608][ T5340] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.329287][ T5340] ? clear_bhb_loop+0x60/0xb0 [ 75.331368][ T5340] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.333979][ T5340] RIP: 0033:0x7f795f98f7c9 [ 75.335867][ T5340] 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 [ 75.344230][ T5340] RSP: 002b:00007f795bdf5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 75.347823][ T5340] RAX: ffffffffffffffda RBX: 00007f795fbe5fa0 RCX: 00007f795f98f7c9 [ 75.351232][ T5340] RDX: 0000200000000140 RSI: 0000000040946400 RDI: 0000000000000003 [ 75.354555][ T5340] RBP: 00007f795fa13f91 R08: 0000000000000000 R09: 0000000000000000 [ 75.357963][ T5340] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.361401][ T5340] R13: 00007f795fbe6038 R14: 00007f795fbe5fa0 R15: 00007fff6a839a68 [ 75.364765][ T5340] [ 75.366148][ T5340] Modules linked in: [ 75.367875][ T5340] CR2: ffffffffffffff91 [ 75.369682][ T5340] ---[ end trace 0000000000000000 ]--- [ 75.372058][ T5340] RIP: 0010:subdev_8255_io+0x64/0xb0 [ 75.374357][ T5340] Code: e8 f1 83 fd f8 49 81 c6 d0 01 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 94 21 65 f9 01 eb 41 03 1e 44 89 f8 <89> 66 90 31 c0 eb 2d e8 c0 83 fd f8 49 81 c6 d0 01 00 00 4c 89 f0 [ 75.382535][ T5340] RSP: 0018:ffffc9000d4bf9c0 EFLAGS: 00010206 [ 75.385152][ T5340] RAX: 000000000000009b RBX: 0000000000000203 RCX: ffff888000af4980 [ 75.388471][ T5340] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 75.391829][ T5340] RBP: 0000000000000003 R08: 0000000000000200 R09: 00000000ffffffff [ 75.395326][ T5340] R10: 000000000000000b R11: ffffffff88c3d6f0 R12: 0000000000000001 [ 75.398817][ T5340] R13: dffffc0000000000 R14: ffff88803e71d1d0 R15: 000000000000009b [ 75.402219][ T5340] FS: 00007f795bdf56c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000 [ 75.406094][ T5340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.408938][ T5340] CR2: ffffffffffffff91 CR3: 0000000010eb7000 CR4: 0000000000352ef0 [ 75.412433][ T5340] Kernel panic - not syncing: Fatal exception [ 75.415550][ T5340] Kernel Offset: disabled [ 75.417496][ T5340] Rebooting in 86400 seconds..