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, 0x40, &(0x7f0000000400)) mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./sys\x00', 0x1ff) mount(&(0x7f0000000d00)=@filename='none\x00', &(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\x00', 0x5) [ 94.794523][ T4651] Bluetooth: hci0: command tx timeout [ 95.126071][ T804] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 95.279592][ T804] usb 5-1: New USB device found, idVendor=0572, idProduct=cafe, bcdDevice= 1.00 [ 95.283241][ T804] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 95.509394][ T804] cxacru 5-1:1.0: invalid response length to cm 0x90: 0 [ 95.519391][ T5332] cxacru 5-1:1.0: Direct firmware load for cxacru-fw.bin failed with error -2 [ 95.529201][ T5332] cxacru 5-1:1.0: Falling back to sysfs fallback for: cxacru-fw.bin [ 96.856008][ T4651] Bluetooth: hci0: command tx timeout [ 98.138397][ T5326] cxacru 5-1:1.0: receive of cm 0x85 failed (-104) [ 98.145398][ T5326] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI [ 98.150116][ T5326] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 98.153451][ T5326] CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 98.157012][ T5326] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 98.161008][ T5326] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 98.163245][ T5326] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 e7 2a 88 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 e0 [ 98.170749][ T5326] RSP: 0018:ffffc9000f0bfb80 EFLAGS: 00010202 [ 98.173213][ T5326] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff8880127bf078 [ 98.176307][ T5326] RDX: 0000000000000010 RSI: 0000000000000692 RDI: 0000000000000693 [ 98.179373][ T5326] RBP: ffffc9000f0bfc40 R08: ffffc9000f0bf907 R09: 1ffff92001e17f20 [ 98.182514][ T5326] R10: dffffc0000000000 R11: fffff52001e17f21 R12: ffff88805300e800 [ 98.185535][ T5326] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001e17f74 [ 98.188567][ T5326] FS: 00007f2d64f086c0(0000) GS:ffff88808c543000(0000) knlGS:0000000000000000 [ 98.191995][ T5326] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.194652][ T5326] CR2: 00005555580c6a58 CR3: 0000000013654000 CR4: 0000000000352ef0 [ 98.197897][ T5326] Call Trace: [ 98.199267][ T5326] [ 98.200463][ T5326] ? sysfs_file_kobj+0x1a/0x230 [ 98.202386][ T5326] ? __pfx_adsl_state_store+0x10/0x10 [ 98.204573][ T5326] ? sysfs_file_kobj+0x1e4/0x230 [ 98.206470][ T5326] ? sysfs_kf_write+0x166/0x260 [ 98.208432][ T5326] ? __pfx_sysfs_kf_write+0x10/0x10 [ 98.210419][ T5326] kernfs_fop_write_iter+0x3a4/0x540 [ 98.212510][ T5326] vfs_write+0x612/0xba0 [ 98.214214][ T5326] ? __pfx_vfs_write+0x10/0x10 [ 98.216114][ T5326] ? __fget_files+0x2a/0x420 [ 98.217939][ T5326] ksys_write+0x150/0x270 [ 98.219565][ T5326] ? __pfx_ksys_write+0x10/0x10 [ 98.221535][ T5326] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 98.223999][ T5326] do_syscall_64+0x174/0x580 [ 98.225755][ T5326] ? trace_irq_disable+0x3b/0x140 [ 98.227778][ T5326] ? clear_bhb_loop+0x40/0x90 [ 98.229601][ T5326] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 98.231867][ T5326] RIP: 0033:0x7f2d63f9df99 [ 98.233638][ T5326] 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 [ 98.240990][ T5326] RSP: 002b:00007f2d64f07fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 98.244264][ T5326] RAX: ffffffffffffffda RBX: 00007f2d64226090 RCX: 00007f2d63f9df99 [ 98.247337][ T5326] RDX: 0000000000000005 RSI: 0000200000001200 RDI: 0000000000000004 [ 98.250480][ T5326] RBP: 00007f2d64034ec4 R08: 0000000000000000 R09: 0000000000000000 [ 98.253574][ T5326] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 98.256551][ T5326] R13: 00007f2d64226128 R14: 00007f2d64226090 R15: 00007ffc3f58d178 [ 98.259574][ T5326] [ 98.260792][ T5326] Modules linked in: [ 98.262809][ T5326] ---[ end trace 0000000000000000 ]--- [ 98.269148][ T5326] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 98.271298][ T5326] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 e7 2a 88 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 e0 [ 98.279165][ T5326] RSP: 0018:ffffc9000f0bfb80 EFLAGS: 00010202 [ 98.281658][ T5326] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff8880127bf078 [ 98.284842][ T5326] RDX: 0000000000000010 RSI: 0000000000000692 RDI: 0000000000000693 [ 98.288365][ T5326] RBP: ffffc9000f0bfc40 R08: ffffc9000f0bf907 R09: 1ffff92001e17f20 [ 98.291608][ T5326] R10: dffffc0000000000 R11: fffff52001e17f21 R12: ffff88805300e800 [ 98.294770][ T5326] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001e17f74 [ 98.298210][ T5326] FS: 00007f2d64f086c0(0000) GS:ffff88808c543000(0000) knlGS:0000000000000000 [ 98.301893][ T5326] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.304503][ T5326] CR2: 00007f9d4b0ffd20 CR3: 0000000013654000 CR4: 0000000000352ef0 [ 98.308023][ T5326] Kernel panic - not syncing: Fatal exception [ 98.310847][ T5326] Kernel Offset: disabled [ 98.312624][ T5326] Rebooting in 86400 seconds..