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: 13692 Comm: vhci_tx Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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+0x5a0/0x1b30 drivers/usb/usbip/vhci_tx.c:241
Code: 48 4d 8d 77 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 9f 45 ab fa 4d 8b 26 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 81 45 ab fa 4d 8b 36 48 8b 44 24
RSP: 0018:ffffc90002ee7a40 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8880680bbb84 RCX: ffff88802a7c3c80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002ee7e18 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: 0000000000000007 R11: ffffffff81ad6a70 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000018 R15: ffff8880680bbb00
FS:  0000000000000000(0000) GS:ffff888125aad000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555563e0a5c8 CR3: 0000000063860000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kthread+0x389/0x480 kernel/kthread.c:467
 ret_from_fork+0x510/0xa50 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+0x5a0/0x1b30 drivers/usb/usbip/vhci_tx.c:241
Code: 48 4d 8d 77 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 9f 45 ab fa 4d 8b 26 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 81 45 ab fa 4d 8b 36 48 8b 44 24
RSP: 0018:ffffc90002ee7a40 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff8880680bbb84 RCX: ffff88802a7c3c80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002ee7e18 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: 0000000000000007 R11: ffffffff81ad6a70 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000018 R15: ffff8880680bbb00
FS:  0000000000000000(0000) GS:ffff888125aad000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557f766808 CR3: 0000000020766000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	48                   	rex.W
   1:	4d 8d 77 08          	lea    0x8(%r15),%r14
   5:	4c 89 f0             	mov    %r14,%rax
   8:	48 c1 e8 03          	shr    $0x3,%rax
   c:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  11:	74 08                	je     0x1b
  13:	4c 89 f7             	mov    %r14,%rdi
  16:	e8 9f 45 ab fa       	call   0xfaab45ba
  1b:	4d 8b 26             	mov    (%r14),%r12
  1e:	4d 8d 74 24 18       	lea    0x18(%r12),%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 81 45 ab fa       	call   0xfaab45ba
  39:	4d 8b 36             	mov    (%r14),%r14
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24