Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 8177 Comm: vhci_tx Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:setup_cmd_submit_pdu drivers/usb/usbip/vhci_tx.c:16 [inline]
RIP: 0010:vhci_send_cmd_submit drivers/usb/usbip/vhci_tx.c:95 [inline]
RIP: 0010:vhci_tx_loop+0x5fc/0x1c50 drivers/usb/usbip/vhci_tx.c:241
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 ad 94 f2 fa 4c 8b 23 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 86 94 f2 fa 4c 8b 33 48 b8 00 00 00
RSP: 0018:ffffc900052dfa40 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900052dfe18 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f59a7f R12: 0000000000000000
R13: fffff52000a5bf64 R14: ffff88802a124e00 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125dc7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fae09193fa8 CR3: 000000002aa36000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 drivers/usb/usbip/vhci_tx.c:95 [inline]
RIP: 0010:vhci_tx_loop+0x5fc/0x1c50 drivers/usb/usbip/vhci_tx.c:241
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 ad 94 f2 fa 4c 8b 23 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 86 94 f2 fa 4c 8b 33 48 b8 00 00 00
RSP: 0018:ffffc900052dfa40 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900052dfe18 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f59a7f R12: 0000000000000000
R13: fffff52000a5bf64 R14: ffff88802a124e00 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125dc7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fae09193fa8 CR3: 000000002aa36000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	e8 03 42 80 3c       	call   0x3c804208
   5:	38 00                	cmp    %al,(%rax)
   7:	74 08                	je     0x11
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 ad 94 f2 fa       	call   0xfaf294be
  11:	4c 8b 23             	mov    (%rbx),%r12
  14:	49 8d 5c 24 18       	lea    0x18(%r12),%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 86 94 f2 fa       	call   0xfaf294be
  38:	4c 8b 33             	mov    (%rbx),%r14
  3b:	48                   	rex.W
  3c:	b8                   	.byte 0xb8
  3d:	00 00                	add    %al,(%rax)