program: r0 = openat$comedi(0xffffffffffffff9c, &(0x7f000000b200)='/dev/comedi1\x00', 0x8040, 0x0) bpf$BPF_PROG_WITH_BTFID_LOAD(0x5, &(0x7f0000000300)=@bpf_lsm={0xa, 0x5, &(0x7f00000003c0)=ANY=[@ANYBLOB="28759430181af9153aff5f5d51818c660a00000000000861119f0000000000180000000000000000000000000000009500000000000000bf51e6a0c18d904a9e0227e5c7df300f0377e292c7307ebd726418a424f84130571da50b56e3944ec51659ff6ac797451701b9ef511a661622480eacdbce9fcf17375ad643af3f1280d46d738076877e6890"], &(0x7f0000000000)='GPL\x00'}, 0x80) bpf$PROG_LOAD_XDP(0x5, &(0x7f0000000200)={0x12, 0x4, &(0x7f0000000000)=@framed={{}, [@ldst={0x1, 0x2, 0x3, 0x4, 0x1, 0xf}]}, &(0x7f0000000980)='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, 0xf}, 0x80) syz_emit_ethernet(0x4a, &(0x7f0000000a80)={@local, @empty, @val={@void}, {@mpls_mc={0x8848, {[], @ipv6=@dccp_packet={0x1, 0x6, "e8f138", 0x10, 0x21, 0x1, @private1={0xfc, 0x1, '\x00', 0x1}, @initdev={0xfe, 0x88, '\x00', 0x1, 0x0}, {[], {{0x4e21, 0x4e23, 0x4, 0x1, 0x6, 0x0, 0x0, 0x7, 0x3, "6ad1b9", 0x8e, "79e09e"}}}}}}}}, 0x0) ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, &(0x7f0000000100)={'pcl818\x00', [0x8003, 0x10, 0x1, 0x80000001, 0xfffffffb, 0x6f8, 0x4d7, 0x0, 0x4, 0x4, 0x0, 0x401, 0x3, 0x8001, 0x9, 0x7ff, 0xa, 0x1, 0x0, 0x5, 0x8, 0x10, 0xfe, 0x6, 0x54, 0x10001, 0x26, 0x40, 0x10001, 0x8, 0x1]}) r1 = openat$binfmt_register(0xffffff9c, &(0x7f0000000180), 0x1, 0x0) r2 = socket$inet6_udp(0xa, 0x2, 0x0) connect$inet6(r2, &(0x7f0000000080)={0xa, 0x0, 0x0, @remote, 0x7}, 0x1c) sendmmsg$inet6(r2, &(0x7f0000004a80)=[{{0x0, 0x0, 0x0}}], 0x1, 0x8040) sendmmsg$inet6(r2, &(0x7f0000000000)=[{{&(0x7f0000004d40)={0xa, 0x0, 0x0, @mcast2}, 0x1c, 0x0}}, {{0x0, 0x0, &(0x7f0000008b80)=[{0x0, 0x3e}, {&(0x7f0000008900)='y', 0x1}], 0x2}}], 0x2, 0x4008040) write$binfmt_register(r1, &(0x7f00000001c0)={0x3a, 'syz3', 0x3a, 'E', 0x3a, 0x4000000000000c1, 0x3a, '\x00', 0x3a, ']\xff\xff\xff\x7f^{', 0x3a, './file0'}, 0x2f) r3 = syz_genetlink_get_family_id$nfc(&(0x7f0000000040), 0xffffffffffffffff) sendmsg$NFC_CMD_LLC_SDREQ(0xffffffffffffffff, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000240)={&(0x7f00000002c0)=ANY=[@ANYBLOB="20000080", @ANYRES16=r3, @ANYBLOB="010000000000000000001300000008000100", @ANYRES32=0x0, @ANYBLOB="04001380"], 0x20}}, 0x0) ioctl$COMEDI_DEVCONFIG(r0, 0x40946400, 0x0) [ 76.336634][ T4681] Bluetooth: hci0: command tx timeout [ 76.407745][ T5335] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN NOPTI [ 76.413143][ T5335] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] [ 76.416537][ T5335] CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 76.420572][ T5335] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 76.425350][ T5335] RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 [ 76.428200][ T5335] 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 [ 76.437494][ T5335] RSP: 0018:ffffc9000d42fa40 EFLAGS: 00010206 [ 76.440202][ T5335] RAX: 0000000000000005 RBX: ffff8880426aeb80 RCX: 0000000000100000 [ 76.443679][ T5335] RDX: ffffc9000f1ba000 RSI: 0000000000000365 RDI: 0000000000000366 [ 76.447242][ T5335] RBP: 0000000000000001 R08: ffff88803e78e92f R09: 1ffff11007cf1d25 [ 76.451057][ T5335] R10: dffffc0000000000 R11: ffffffff88bbfdf0 R12: 0000000000000028 [ 76.454888][ T5335] R13: dffffc0000000000 R14: ffff88803e78e800 R15: dffffc0000000000 [ 76.458570][ T5335] FS: 00007fbe653806c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000 [ 76.462537][ T5335] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.465417][ T5335] CR2: 00007fbe65317d60 CR3: 0000000043017000 CR4: 0000000000352ef0 [ 76.469245][ T5335] Call Trace: [ 76.470816][ T5335] [ 76.472204][ T5335] pcl818_detach+0x66/0xd0 [ 76.474103][ T5335] comedi_device_detach_locked+0x178/0x750 [ 76.476737][ T5335] comedi_unlocked_ioctl+0xcde/0x1020 [ 76.479072][ T5335] ? kasan_quarantine_put+0xdd/0x220 [ 76.481734][ T5335] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 76.484537][ T5335] ? do_futex+0x333/0x420 [ 76.486417][ T5335] ? __fget_files+0x2a/0x420 [ 76.488492][ T5335] ? __fget_files+0x2a/0x420 [ 76.490543][ T5335] ? __fget_files+0x3a0/0x420 [ 76.492510][ T5335] ? __fget_files+0x2a/0x420 [ 76.494678][ T5335] ? bpf_lsm_file_ioctl+0x9/0x20 [ 76.497301][ T5335] ? __pfx_comedi_unlocked_ioctl+0x10/0x10 [ 76.500262][ T5335] __se_sys_ioctl+0xfc/0x170 [ 76.502351][ T5335] do_syscall_64+0xfa/0xf80 [ 76.504342][ T5335] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.506825][ T5335] ? clear_bhb_loop+0x60/0xb0 [ 76.508833][ T5335] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 76.511419][ T5335] RIP: 0033:0x7fbe6458f7c9 [ 76.513868][ T5335] 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 [ 76.522239][ T5335] RSP: 002b:00007fbe65380038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 76.525834][ T5335] RAX: ffffffffffffffda RBX: 00007fbe647e5fa0 RCX: 00007fbe6458f7c9 [ 76.529125][ T5335] RDX: 0000000000000000 RSI: 0000000040946400 RDI: 0000000000000003 [ 76.532775][ T5335] RBP: 00007fbe64613f91 R08: 0000000000000000 R09: 0000000000000000 [ 76.536560][ T5335] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 76.539922][ T5335] R13: 00007fbe647e6038 R14: 00007fbe647e5fa0 R15: 00007fff464bd3f8 [ 76.543226][ T5335] [ 76.544653][ T5335] Modules linked in: [ 76.546926][ T5335] ---[ end trace 0000000000000000 ]--- [ 76.555555][ T5335] RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 [ 76.558229][ T5335] 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 [ 76.567723][ T5335] RSP: 0018:ffffc9000d42fa40 EFLAGS: 00010206 [ 76.570400][ T5335] RAX: 0000000000000005 RBX: ffff8880426aeb80 RCX: 0000000000100000 [ 76.573734][ T5335] RDX: ffffc9000f1ba000 RSI: 0000000000000365 RDI: 0000000000000366 [ 76.578113][ T5335] RBP: 0000000000000001 R08: ffff88803e78e92f R09: 1ffff11007cf1d25 [ 76.581925][ T5335] R10: dffffc0000000000 R11: ffffffff88bbfdf0 R12: 0000000000000028 [ 76.585922][ T5335] R13: dffffc0000000000 R14: ffff88803e78e800 R15: dffffc0000000000 [ 76.589906][ T5335] FS: 00007fbe653806c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000 [ 76.594073][ T5335] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.597498][ T5335] CR2: 00007fbe65317d60 CR3: 0000000043017000 CR4: 0000000000352ef0 [ 76.602572][ T5335] Kernel panic - not syncing: Fatal exception [ 76.605622][ T5335] Kernel Offset: disabled [ 76.607542][ T5335] Rebooting in 86400 seconds..