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) [ 105.454773][ T5280] Bluetooth: hci0: command tx timeout [ 105.788473][ T934] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 105.939840][ T934] usb 5-1: New USB device found, idVendor=0572, idProduct=cafe, bcdDevice= 1.00 [ 105.941731][ T934] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 106.171468][ T934] cxacru 5-1:1.0: invalid response length to cm 0x90: 0 [ 106.183830][ T5319] cxacru 5-1:1.0: Direct firmware load for cxacru-fw.bin failed with error -2 [ 106.183850][ T5319] cxacru 5-1:1.0: Falling back to sysfs fallback for: cxacru-fw.bin [ 107.519001][ T5280] Bluetooth: hci0: command tx timeout [ 108.801329][ T5316] cxacru 5-1:1.0: receive of cm 0x85 failed (-104) [ 108.801367][ T5316] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI [ 108.809065][ T5316] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 108.812431][ T5316] CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 108.816282][ T5316] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 108.820536][ T5316] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 108.822940][ T5316] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 67 33 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 e0 [ 108.830898][ T5316] RSP: 0018:ffffc9000dabfb80 EFLAGS: 00010202 [ 108.833461][ T5316] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff888012e31078 [ 108.836797][ T5316] RDX: 0000000000000010 RSI: 0000000000000540 RDI: 0000000000000541 [ 108.840152][ T5316] RBP: ffffc9000dabfc40 R08: ffffc9000dabf907 R09: 1ffff92001b57f20 [ 108.843306][ T5316] R10: dffffc0000000000 R11: fffff52001b57f21 R12: ffff888052315800 [ 108.846788][ T5316] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001b57f74 [ 108.850122][ T5316] FS: 00007f2e29e6a6c0(0000) GS:ffff88808c2c0000(0000) knlGS:0000000000000000 [ 108.853765][ T5316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 108.856582][ T5316] CR2: 00005555890caa58 CR3: 000000004311b000 CR4: 0000000000352ef0 [ 108.860712][ T5316] Call Trace: [ 108.862199][ T5316] [ 108.863524][ T5316] ? sysfs_file_kobj+0x1a/0x230 [ 108.865643][ T5316] ? __pfx_adsl_state_store+0x10/0x10 [ 108.867849][ T5316] ? sysfs_file_kobj+0x1e4/0x230 [ 108.869761][ T5316] ? sysfs_kf_write+0x166/0x260 [ 108.871842][ T5316] ? __pfx_sysfs_kf_write+0x10/0x10 [ 108.874035][ T5316] kernfs_fop_write_iter+0x3a4/0x540 [ 108.876267][ T5316] vfs_write+0x612/0xba0 [ 108.878047][ T5316] ? __pfx_vfs_write+0x10/0x10 [ 108.880122][ T5316] ? __fget_files+0x2a/0x420 [ 108.882152][ T5316] ksys_write+0x150/0x270 [ 108.884042][ T5316] ? __pfx_ksys_write+0x10/0x10 [ 108.886243][ T5316] do_syscall_64+0x166/0x520 [ 108.888319][ T5316] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 108.890948][ T5316] ? clear_bhb_loop+0x70/0xc0 [ 108.893057][ T5316] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 108.895595][ T5316] RIP: 0033:0x7f2e28f9e159 [ 108.897513][ T5316] 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 [ 108.905730][ T5316] RSP: 002b:00007f2e29e69fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 108.909297][ T5316] RAX: ffffffffffffffda RBX: 00007f2e29226090 RCX: 00007f2e28f9e159 [ 108.912690][ T5316] RDX: 0000000000000004 RSI: 0000200000001200 RDI: 0000000000000004 [ 108.916105][ T5316] RBP: 00007f2e2903506b R08: 0000000000000000 R09: 0000000000000000 [ 108.919500][ T5316] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 108.922814][ T5316] R13: 00007f2e29226128 R14: 00007f2e29226090 R15: 00007ffd2b42b2c8 [ 108.926188][ T5316] [ 108.927634][ T5316] Modules linked in: [ 108.929646][ T5316] ---[ end trace 0000000000000000 ]--- [ 108.935215][ T5316] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 108.935238][ T5316] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 67 33 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 e0 [ 108.935248][ T5316] RSP: 0018:ffffc9000dabfb80 EFLAGS: 00010202 [ 108.935262][ T5316] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff888012e31078 [ 108.935270][ T5316] RDX: 0000000000000010 RSI: 0000000000000540 RDI: 0000000000000541 [ 108.935277][ T5316] RBP: ffffc9000dabfc40 R08: ffffc9000dabf907 R09: 1ffff92001b57f20 [ 108.935287][ T5316] R10: dffffc0000000000 R11: fffff52001b57f21 R12: ffff888052315800 [ 108.935294][ T5316] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001b57f74 [ 108.935302][ T5316] FS: 00007f2e29e6a6c0(0000) GS:ffff88808c2c0000(0000) knlGS:0000000000000000 [ 108.935312][ T5316] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 108.935319][ T5316] CR2: 00005555890caa58 CR3: 000000004311b000 CR4: 0000000000352ef0 [ 108.935360][ T5316] Kernel panic - not syncing: Fatal exception [ 108.977212][ T5316] Kernel Offset: disabled [ 108.978959][ T5316] Rebooting in 86400 seconds..