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) [ 105.748705][ T5279] Bluetooth: hci0: command tx timeout [ 106.165731][ T9] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 106.318371][ T9] usb 5-1: New USB device found, idVendor=0572, idProduct=cafe, bcdDevice= 1.00 [ 106.321608][ T9] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 106.561849][ T9] cxacru 5-1:1.0: invalid response length to cm 0x90: 0 [ 106.571316][ T5323] cxacru 5-1:1.0: Direct firmware load for cxacru-fw.bin failed with error -2 [ 106.571335][ T5323] cxacru 5-1:1.0: Falling back to sysfs fallback for: cxacru-fw.bin [ 107.827096][ T5279] Bluetooth: hci0: command tx timeout [ 109.186984][ T5321] cxacru 5-1:1.0: receive of cm 0x85 failed (-104) [ 109.187218][ T5321] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI [ 109.195127][ T5321] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 109.198856][ T5321] CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 109.202996][ T5321] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 109.207271][ T5321] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 109.210018][ T5321] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 47 e8 7d 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 [ 109.219888][ T5321] RSP: 0018:ffffc9000e997b80 EFLAGS: 00010202 [ 109.222582][ T5321] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff88801272c078 [ 109.225870][ T5321] RDX: 0000000000000010 RSI: 0000000000000480 RDI: 0000000000000481 [ 109.229189][ T5321] RBP: ffffc9000e997c40 R08: ffffc9000e997907 R09: 1ffff92001d32f20 [ 109.232471][ T5321] R10: dffffc0000000000 R11: fffff52001d32f21 R12: ffff888012d5f000 [ 109.235732][ T5321] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001d32f74 [ 109.239186][ T5321] FS: 00007f0cee9b86c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 [ 109.243083][ T5321] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 109.245949][ T5321] CR2: 00007fcfd10c10c0 CR3: 0000000013958000 CR4: 0000000000352ef0 [ 109.249201][ T5321] Call Trace: [ 109.252265][ T5321] [ 109.253557][ T5321] ? sysfs_file_kobj+0x1a/0x230 [ 109.257795][ T5321] ? __pfx_adsl_state_store+0x10/0x10 [ 109.260759][ T5321] ? sysfs_file_kobj+0x1e4/0x230 [ 109.262910][ T5321] ? sysfs_kf_write+0x166/0x260 [ 109.264976][ T5321] ? __pfx_sysfs_kf_write+0x10/0x10 [ 109.267184][ T5321] kernfs_fop_write_iter+0x3a4/0x540 [ 109.269392][ T5321] vfs_write+0x612/0xba0 [ 109.271258][ T5321] ? __pfx_vfs_write+0x10/0x10 [ 109.273577][ T5321] ? __fget_files+0x2a/0x420 [ 109.276090][ T5321] ksys_write+0x150/0x270 [ 109.278305][ T5321] ? __pfx_ksys_write+0x10/0x10 [ 109.280837][ T5321] do_syscall_64+0x166/0x520 [ 109.282941][ T5321] ? trace_irq_disable+0x3b/0x140 [ 109.284973][ T5321] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 109.287690][ T5321] ? clear_bhb_loop+0x70/0xc0 [ 109.289757][ T5321] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 109.292364][ T5321] RIP: 0033:0x7f0cedb9e159 [ 109.294316][ T5321] 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 [ 109.301866][ T5321] RSP: 002b:00007f0cee9b7fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 109.304716][ T5321] RAX: ffffffffffffffda RBX: 00007f0cede26090 RCX: 00007f0cedb9e159 [ 109.308105][ T5321] RDX: 0000000000000004 RSI: 0000200000001200 RDI: 0000000000000004 [ 109.311044][ T5321] RBP: 00007f0cedc3506b R08: 0000000000000000 R09: 0000000000000000 [ 109.314255][ T5321] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 109.317237][ T5321] R13: 00007f0cede26128 R14: 00007f0cede26090 R15: 00007fff9f462f78 [ 109.320415][ T5321] [ 109.321769][ T5321] Modules linked in: [ 109.323960][ T5321] ---[ end trace 0000000000000000 ]--- [ 109.330896][ T5321] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 109.330920][ T5321] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 47 e8 7d 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 [ 109.330930][ T5321] RSP: 0018:ffffc9000e997b80 EFLAGS: 00010202 [ 109.330941][ T5321] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff88801272c078 [ 109.330949][ T5321] RDX: 0000000000000010 RSI: 0000000000000480 RDI: 0000000000000481 [ 109.330956][ T5321] RBP: ffffc9000e997c40 R08: ffffc9000e997907 R09: 1ffff92001d32f20 [ 109.330964][ T5321] R10: dffffc0000000000 R11: fffff52001d32f21 R12: ffff888012d5f000 [ 109.330971][ T5321] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001d32f74 [ 109.330979][ T5321] FS: 00007f0cee9b86c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 [ 109.330987][ T5321] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 109.330994][ T5321] CR2: 00007f8b901f56b0 CR3: 0000000013958000 CR4: 0000000000352ef0 [ 109.331035][ T5321] Kernel panic - not syncing: Fatal exception [ 109.371409][ T5321] Kernel Offset: disabled [ 109.373207][ T5321] Rebooting in 86400 seconds..