program: r0 = syz_usb_connect(0x3, 0x40, &(0x7f0000000000)=ANY=[@ANYBLOB="12010002000000407205feca00010000000109022e0001010080fa0904000004ff000000070501020002000705810200020007050202000200070582020002"], 0x0) syz_usb_ep_read(r0, 0x1, 0x0, 0x0) syz_usb_ep_write(r0, 0x81, 0x0, 0x0) syz_usb_ep_read(r0, 0x1, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000e00)='./sys\x00', &(0x7f0000000f00)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000001000)='./sys/devices/platform/dummy_hcd.0/usb5/5-1/5-1:1.0/adsl_state\x00', 0x2, 0x0) write(r1, &(0x7f0000001200)='stop', 0x4) [ 122.801533][ T4647] Bluetooth: hci0: command tx timeout [ 123.033558][ T5317] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 123.184927][ T5317] usb 5-1: New USB device found, idVendor=0572, idProduct=cafe, bcdDevice= 1.00 [ 123.186770][ T5317] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 123.415832][ T5317] cxacru 5-1:1.0: invalid response length to cm 0x90: 0 [ 123.420044][ T5322] cxacru 5-1:1.0: Direct firmware load for cxacru-fw.bin failed with error -2 [ 123.420065][ T5322] cxacru 5-1:1.0: Falling back to sysfs fallback for: cxacru-fw.bin [ 124.844862][ T4647] Bluetooth: hci0: command tx timeout [ 126.048595][ T5320] cxacru 5-1:1.0: receive of cm 0x85 failed (-104) [ 126.063984][ T5320] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI [ 126.069403][ T5320] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 126.073031][ T5320] CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 126.077004][ T5320] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 126.081659][ T5320] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 126.084192][ T5320] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 67 5d 7e fa 48 8b 4c 24 10 48 8b 11 48 83 c2 10 48 89 d0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 4b 01 00 00 4d 89 f4 8b 32 48 c7 c7 00 [ 126.092556][ T5320] RSP: 0018:ffffc9000f37fb80 EFLAGS: 00010202 [ 126.095132][ T5320] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff8880128b4078 [ 126.098321][ T5320] RDX: 0000000000000010 RSI: 0000000000000463 RDI: 0000000000000464 [ 126.101519][ T5320] RBP: ffffc9000f37fc40 R08: ffffc9000f37f907 R09: 1ffff92001e6ff20 [ 126.104892][ T5320] R10: dffffc0000000000 R11: fffff52001e6ff21 R12: ffff88801f950000 [ 126.108826][ T5320] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001e6ff74 [ 126.112474][ T5320] FS: 00007f64ac7fb6c0(0000) GS:ffff88808c2c6000(0000) knlGS:0000000000000000 [ 126.116407][ T5320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 126.119474][ T5320] CR2: 0000555578459a58 CR3: 0000000012e42000 CR4: 0000000000352ef0 [ 126.123007][ T5320] Call Trace: [ 126.124500][ T5320] [ 126.125829][ T5320] ? sysfs_file_kobj+0x1a/0x230 [ 126.128029][ T5320] ? __pfx_adsl_state_store+0x10/0x10 [ 126.130676][ T5320] ? sysfs_file_kobj+0x1e4/0x230 [ 126.132971][ T5320] ? sysfs_kf_write+0x166/0x260 [ 126.135292][ T5320] ? __pfx_sysfs_kf_write+0x10/0x10 [ 126.137731][ T5320] kernfs_fop_write_iter+0x3a4/0x540 [ 126.140178][ T5320] vfs_write+0x612/0xba0 [ 126.142056][ T5320] ? __pfx_vfs_write+0x10/0x10 [ 126.144229][ T5320] ? __fget_files+0x2a/0x420 [ 126.146221][ T5320] ksys_write+0x150/0x270 [ 126.148244][ T5320] ? __pfx_ksys_write+0x10/0x10 [ 126.150365][ T5320] do_syscall_64+0x166/0x520 [ 126.152428][ T5320] ? trace_irq_disable+0x3b/0x140 [ 126.154468][ T5320] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.156868][ T5320] ? clear_bhb_loop+0x70/0xc0 [ 126.158719][ T5320] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.161139][ T5320] RIP: 0033:0x7f64ab99e159 [ 126.162989][ T5320] 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 [ 126.171258][ T5320] RSP: 002b:00007f64ac7fafe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 126.175598][ T5320] RAX: ffffffffffffffda RBX: 00007f64abc26090 RCX: 00007f64ab99e159 [ 126.179608][ T5320] RDX: 0000000000000004 RSI: 0000200000001200 RDI: 0000000000000004 [ 126.183015][ T5320] RBP: 00007f64aba3506b R08: 0000000000000000 R09: 0000000000000000 [ 126.186440][ T5320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 126.189884][ T5320] R13: 00007f64abc26128 R14: 00007f64abc26090 R15: 00007fff67498648 [ 126.193246][ T5320] [ 126.194612][ T5320] Modules linked in: [ 126.200190][ T5320] ---[ end trace 0000000000000000 ]--- [ 126.279408][ T5320] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 126.279475][ T5320] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 67 5d 7e fa 48 8b 4c 24 10 48 8b 11 48 83 c2 10 48 89 d0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 4b 01 00 00 4d 89 f4 8b 32 48 c7 c7 00 [ 126.279486][ T5320] RSP: 0018:ffffc9000f37fb80 EFLAGS: 00010202 [ 126.279511][ T5320] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff8880128b4078 [ 126.279520][ T5320] RDX: 0000000000000010 RSI: 0000000000000463 RDI: 0000000000000464 [ 126.279539][ T5320] RBP: ffffc9000f37fc40 R08: ffffc9000f37f907 R09: 1ffff92001e6ff20 [ 126.279547][ T5320] R10: dffffc0000000000 R11: fffff52001e6ff21 R12: ffff88801f950000 [ 126.279556][ T5320] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001e6ff74 [ 126.279565][ T5320] FS: 00007f64ac7fb6c0(0000) GS:ffff88808c2c6000(0000) knlGS:0000000000000000 [ 126.279574][ T5320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 126.279583][ T5320] CR2: 000055b38e62f168 CR3: 0000000012e42000 CR4: 0000000000352ef0 [ 126.279621][ T5320] Kernel panic - not syncing: Fatal exception [ 126.321796][ T5320] Kernel Offset: disabled [ 126.323655][ T5320] Rebooting in 86400 seconds..