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) syz_usb_ep_write(r0, 0xff, 0x7d, &(0x7f0000000200)="ec75a09afff43faa525f5a4a1a338e5b6e81337946de427814314e5ae0a40f0c28de8dbb991e03aaa0fdfa17cec94c6956d673152aa57de07aec806c1387dfe04f02987a61fd9ebef9417c7701721bb57366369572d6c5e68e44eaab114065e34fcab62307d8b76d00bd678e10d2be2d7e0837b4d210a4939d66bd2cd2") mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./sys\x00', 0x1ff) mount(0x0, &(0x7f00000001c0)='./sys\x00', &(0x7f0000000f00)='sysfs\x00', 0x1810840, 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) [ 94.220041][ T4641] Bluetooth: hci0: command tx timeout [ 94.737316][ T54] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 94.898820][ T54] usb 5-1: New USB device found, idVendor=0572, idProduct=cafe, bcdDevice= 1.00 [ 94.900594][ T54] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 95.143889][ T54] cxacru 5-1:1.0: invalid response length to cm 0x90: 0 [ 95.158551][ T5323] cxacru 5-1:1.0: Direct firmware load for cxacru-fw.bin failed with error -2 [ 95.158569][ T5323] cxacru 5-1:1.0: Falling back to sysfs fallback for: cxacru-fw.bin [ 95.695770][ T5315] ======================================================= [ 95.695770][ T5315] WARNING: The mand mount option has been deprecated and [ 95.695770][ T5315] and is ignored by this kernel. Remove the mand [ 95.695770][ T5315] option from the mount to silence this warning. [ 95.695770][ T5315] ======================================================= [ 96.229003][ T4641] Bluetooth: hci0: command tx timeout [ 97.748941][ T5315] cxacru 5-1:1.0: receive of cm 0x85 failed (-104) [ 97.749573][ T5315] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI [ 97.756957][ T5315] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 97.760346][ T5315] CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 97.764055][ T5315] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 97.768231][ T5315] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 97.771029][ T5315] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 67 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 [ 97.778591][ T5315] RSP: 0018:ffffc9000e547b80 EFLAGS: 00010202 [ 97.781147][ T5315] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff888012c78078 [ 97.784373][ T5315] RDX: 0000000000000010 RSI: 00000000000004c5 RDI: 00000000000004c6 [ 97.787608][ T5315] RBP: ffffc9000e547c40 R08: ffffc9000e547907 R09: 1ffff92001ca8f20 [ 97.791075][ T5315] R10: dffffc0000000000 R11: fffff52001ca8f21 R12: ffff888012a2d000 [ 97.794296][ T5315] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001ca8f74 [ 97.797602][ T5315] FS: 00007fb8cced26c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 [ 97.801307][ T5315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.803851][ T5315] CR2: 000055555a6d1a58 CR3: 000000000093f000 CR4: 0000000000352ef0 [ 97.806925][ T5315] Call Trace: [ 97.808124][ T5315] [ 97.809320][ T5315] ? sysfs_file_kobj+0x1a/0x230 [ 97.811245][ T5315] ? __pfx_adsl_state_store+0x10/0x10 [ 97.813324][ T5315] ? sysfs_file_kobj+0x1e4/0x230 [ 97.815211][ T5315] ? sysfs_kf_write+0x166/0x260 [ 97.817180][ T5315] ? __pfx_sysfs_kf_write+0x10/0x10 [ 97.819252][ T5315] kernfs_fop_write_iter+0x3a4/0x540 [ 97.821417][ T5315] vfs_write+0x612/0xba0 [ 97.823126][ T5315] ? __pfx_vfs_write+0x10/0x10 [ 97.825091][ T5315] ? __fget_files+0x2a/0x420 [ 97.826929][ T5315] ksys_write+0x150/0x270 [ 97.828728][ T5315] ? __pfx_ksys_write+0x10/0x10 [ 97.830752][ T5315] do_syscall_64+0x166/0x520 [ 97.832640][ T5315] ? trace_irq_disable+0x3b/0x140 [ 97.834742][ T5315] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 97.837180][ T5315] ? clear_bhb_loop+0x70/0xc0 [ 97.839080][ T5315] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 97.841417][ T5315] RIP: 0033:0x7fb8cbf9e159 [ 97.843290][ T5315] 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 [ 97.850862][ T5315] RSP: 002b:00007fb8cced1fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 97.854225][ T5315] RAX: ffffffffffffffda RBX: 00007fb8cc226090 RCX: 00007fb8cbf9e159 [ 97.857609][ T5315] RDX: 0000000000000004 RSI: 0000200000001200 RDI: 0000000000000004 [ 97.861541][ T5315] RBP: 00007fb8cc03506b R08: 0000000000000000 R09: 0000000000000000 [ 97.864754][ T5315] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 97.867848][ T5315] R13: 00007fb8cc226128 R14: 00007fb8cc226090 R15: 00007fffba54bc08 [ 97.871123][ T5315] [ 97.872484][ T5315] Modules linked in: [ 97.883510][ T5315] ---[ end trace 0000000000000000 ]--- [ 97.915223][ T5315] RIP: 0010:adsl_state_store+0x5cc/0x770 [ 97.915252][ T5315] Code: 03 42 80 3c 28 00 74 14 48 89 4c 24 10 48 8b 7c 24 10 e8 67 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 [ 97.915262][ T5315] RSP: 0018:ffffc9000e547b80 EFLAGS: 00010202 [ 97.915274][ T5315] RAX: 0000000000000002 RBX: 00000000ffffff98 RCX: ffff888012c78078 [ 97.915283][ T5315] RDX: 0000000000000010 RSI: 00000000000004c5 RDI: 00000000000004c6 [ 97.915290][ T5315] RBP: ffffc9000e547c40 R08: ffffc9000e547907 R09: 1ffff92001ca8f20 [ 97.915298][ T5315] R10: dffffc0000000000 R11: fffff52001ca8f21 R12: ffff888012a2d000 [ 97.915305][ T5315] R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001ca8f74 [ 97.915313][ T5315] FS: 00007fb8cced26c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000 [ 97.915321][ T5315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.915329][ T5315] CR2: 000055555a6d1a58 CR3: 000000000093f000 CR4: 0000000000352ef0 [ 97.915367][ T5315] Kernel panic - not syncing: Fatal exception [ 97.960146][ T5315] Kernel Offset: disabled [ 97.962017][ T5315] Rebooting in 86400 seconds..