program: r0 = openat$cdrom(0xffffffffffffff9c, &(0x7f0000000040), 0x400, 0x0) r1 = semget$private(0x0, 0x207, 0x0) semctl$GETALL(r1, 0x0, 0xd, &(0x7f0000000240)=""/29) r2 = openat$sndtimer(0xffffffffffffff9c, &(0x7f00000063c0), 0x40) ioctl$SNDRV_TIMER_IOCTL_SELECT(r2, 0x40345410, &(0x7f0000000300)={{0x0, 0x3, 0x8, 0x2, 0xffffffff}}) ioctl$SNDRV_TIMER_IOCTL_PARAMS(r2, 0x40505412, 0x0) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000000)) r3 = openat$comedi(0xffffff9c, &(0x7f0000000040)='/dev/comedi3\x00', 0x2000, 0x0) ioctl$COMEDI_DEVCONFIG(r3, 0x40946400, &(0x7f0000000140)={'pcl818\x00', [0xec, 0x2168, 0x2, 0xc, 0x88d2, 0x8f, 0xb, 0x10, 0x2, 0xfffffffe, 0x1ff, 0x8, 0x1, 0x4, 0x80000, 0x1, 0x40000009, 0x3, 0x0, 0xffffffff, 0x100, 0x3, 0x80, 0x0, 0x1, 0x1, 0xb0c4, 0x1c, 0x8, 0x7, 0xecf]}) ioctl$CDROMPLAYTRKIND(r0, 0x5304, &(0x7f0000000080)={0xd, 0x3c, 0xaa, 0x4}) [ 75.706760][ T5310] Bluetooth: hci0: command tx timeout [ 75.759078][ T5331] comedi comedi3: pcl818: I/O port conflict (0xec,16) [ 75.763103][ T5331] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN NOPTI [ 75.769658][ T5331] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] [ 75.773214][ T5331] CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 75.777320][ T5331] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 75.782132][ T5331] RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 [ 75.785905][ T5331] Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 19 ba 6c f9 48 8b 03 48 89 04 24 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 f8 b9 6c f9 4d 8b 24 24 48 83 c3 [ 75.794861][ T5331] RSP: 0018:ffffc9000d4bf9d8 EFLAGS: 00010206 [ 75.797728][ T5331] RAX: 0000000000000005 RBX: ffff888042973080 RCX: 0000000000100000 [ 75.802518][ T5331] RDX: ffffc9000ea99000 RSI: 0000000000000952 RDI: 0000000000000953 [ 75.806279][ T5331] RBP: 0000000000000001 R08: ffff88803e44192f R09: 1ffff11007c88325 [ 75.809315][ T5331] R10: dffffc0000000000 R11: ffffffff88bbfdf0 R12: 0000000000000028 [ 75.812751][ T5331] R13: dffffc0000000000 R14: ffff88803e441800 R15: dffffc0000000000 [ 75.816173][ T5331] FS: 00007f4f549e86c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000 [ 75.821950][ T5331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.825031][ T5331] CR2: 00002000000063c0 CR3: 0000000042805000 CR4: 0000000000352ef0 [ 75.828365][ T5331] Call Trace: [ 75.829871][ T5331] [ 75.831190][ T5331] pcl818_detach+0x66/0xd0 [ 75.833137][ T5331] comedi_device_detach_locked+0x178/0x750 [ 75.836067][ T5331] comedi_device_attach+0x5d4/0x720 [ 75.838460][ T5331] comedi_unlocked_ioctl+0x5ff/0x1020 [ 75.840991][ T5331] ? kasan_quarantine_put+0xdd/0x220 [ 75.843791][ T5331] ? lockdep_hardirqs_on+0x98/0x140 [ 75.846582][ T5331] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 75.849285][ T5331] ? do_futex+0x395/0x420 [ 75.851202][ T5331] ? __fget_files+0x2a/0x420 [ 75.853294][ T5331] ? __fget_files+0x3a0/0x420 [ 75.855675][ T5331] ? __fget_files+0x2a/0x420 [ 75.857957][ T5331] ? bpf_lsm_file_ioctl+0x9/0x20 [ 75.860228][ T5331] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 75.863031][ T5331] __se_sys_ioctl+0xfc/0x170 [ 75.865102][ T5331] do_syscall_64+0xfa/0xf80 [ 75.867176][ T5331] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.870046][ T5331] ? clear_bhb_loop+0x60/0xb0 [ 75.872536][ T5331] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.875487][ T5331] RIP: 0033:0x7f4f53b8f7c9 [ 75.877510][ T5331] 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 [ 75.885867][ T5331] RSP: 002b:00007f4f549e8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 75.889472][ T5331] RAX: ffffffffffffffda RBX: 00007f4f53de5fa0 RCX: 00007f4f53b8f7c9 [ 75.893617][ T5331] RDX: 0000200000000140 RSI: 0000000040946400 RDI: 0000000000000007 [ 75.897858][ T5331] RBP: 00007f4f53c13f91 R08: 0000000000000000 R09: 0000000000000000 [ 75.901220][ T5331] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.904723][ T5331] R13: 00007f4f53de6038 R14: 00007f4f53de5fa0 R15: 00007ffe00f5b888 [ 75.908697][ T5331] [ 75.910430][ T5331] Modules linked in: [ 75.913140][ T5331] ---[ end trace 0000000000000000 ]--- [ 75.931454][ T5331] RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 [ 75.934895][ T5331] Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 19 ba 6c f9 48 8b 03 48 89 04 24 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 f8 b9 6c f9 4d 8b 24 24 48 83 c3 [ 75.944381][ T5331] RSP: 0018:ffffc9000d4bf9d8 EFLAGS: 00010206 [ 75.947190][ T5331] RAX: 0000000000000005 RBX: ffff888042973080 RCX: 0000000000100000 [ 75.950809][ T5331] RDX: ffffc9000ea99000 RSI: 0000000000000952 RDI: 0000000000000953 [ 75.957084][ T5331] RBP: 0000000000000001 R08: ffff88803e44192f R09: 1ffff11007c88325 [ 75.960700][ T5331] R10: dffffc0000000000 R11: ffffffff88bbfdf0 R12: 0000000000000028 [ 75.965649][ T5331] R13: dffffc0000000000 R14: ffff88803e441800 R15: dffffc0000000000 [ 75.970100][ T5331] FS: 00007f4f549e86c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000 [ 75.975168][ T5331] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.977845][ T5331] CR2: 00007f4f549c6fc8 CR3: 0000000042805000 CR4: 0000000000352ef0 [ 75.981349][ T5331] Kernel panic - not syncing: Fatal exception [ 75.984310][ T5331] Kernel Offset: disabled [ 75.986179][ T5331] Rebooting in 86400 seconds..