Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 2 UID: 0 PID: 12727 Comm: vhci_tx Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:setup_cmd_submit_pdu drivers/usb/usbip/vhci_tx.c:16 [inline]
RIP: 0010:vhci_send_cmd_submit+0x42b/0x1190 drivers/usb/usbip/vhci_tx.c:95
Code: e8 ba 0f 39 fa 48 8d 7b 08 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 fb 0a 00 00 4c 8b 63 08 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 40 0b 00 00 48 c7 c0 80 fa f1 9a 4d 8b 74 24 18
RSP: 0018:ffffc90028427af8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8880207aa500 RCX: ffffffff878535fc
RDX: ffff888024a3a4c0 RSI: ffffffff87853636 RDI: 0000000000000018
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000002b91 R12: 0000000000000000
R13: ffff88806cc03200 R14: 0000000000000000 R15: ffff8880207aa584
FS:  0000000000000000(0000) GS:ffff888097901000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f50e3619 CR3: 0000000070b1a000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vhci_tx_loop+0xff/0x460 drivers/usb/usbip/vhci_tx.c:241
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:setup_cmd_submit_pdu drivers/usb/usbip/vhci_tx.c:16 [inline]
RIP: 0010:vhci_send_cmd_submit+0x42b/0x1190 drivers/usb/usbip/vhci_tx.c:95
Code: e8 ba 0f 39 fa 48 8d 7b 08 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 fb 0a 00 00 4c 8b 63 08 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 40 0b 00 00 48 c7 c0 80 fa f1 9a 4d 8b 74 24 18
RSP: 0018:ffffc90028427af8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8880207aa500 RCX: ffffffff878535fc
RDX: ffff888024a3a4c0 RSI: ffffffff87853636 RDI: 0000000000000018
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000002b91 R12: 0000000000000000
R13: ffff88806cc03200 R14: 0000000000000000 R15: ffff8880207aa584
FS:  0000000000000000(0000) GS:ffff888097a01000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005580742b8000 CR3: 0000000027a17000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 ba 0f 39 fa       	call   0xfa390fbf
   5:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
   9:	48 89 f8             	mov    %rdi,%rax
   c:	48 c1 e8 03          	shr    $0x3,%rax
  10:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  14:	0f 85 fb 0a 00 00    	jne    0xb15
  1a:	4c 8b 63 08          	mov    0x8(%rbx),%r12
  1e:	49 8d 7c 24 18       	lea    0x18(%r12),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2e:	0f 85 40 0b 00 00    	jne    0xb74
  34:	48 c7 c0 80 fa f1 9a 	mov    $0xffffffff9af1fa80,%rax
  3b:	4d 8b 74 24 18       	mov    0x18(%r12),%r14