syzbot

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000081: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000408-0x000000000000040f]
CPU: 1 UID: 0 PID: 6006 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:status_show_vhci drivers/usb/usbip/vhci_sysfs.c:80 [inline]
RIP: 0010:status_show+0x30f/0x5a0 drivers/usb/usbip/vhci_sysfs.c:160
Code: 03 80 3c 02 00 0f 85 9c 02 00 00 48 8b 9b 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 08 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 02 00 00 4c 8b b3 08 04 00 00 c1 e5 04 41 bc
RSP: 0018:ffffc9000385fac0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87751278
RDX: 0000000000000081 RSI: ffffffff8775143e RDI: 0000000000000408
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 000000000000000f R11: 64666b636f732020 R12: ffff88803087402d
R13: ffffc9000385fb10 R14: ffff888030874000 R15: ffff88807941a958
FS:  0000555593cf5500(0000) GS:ffff888124b0d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fe63fff CR3: 0000000075c1c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dev_attr_show+0x56/0xe0 drivers/base/core.c:2421
 sysfs_kf_seq_show+0x216/0x3e0 fs/sysfs/file.c:65
 seq_read_iter+0x50e/0x12d0 fs/seq_file.c:230
 kernfs_fop_read_iter+0x46c/0x610 fs/kernfs/file.c:297
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x8bf/0xcf0 fs/read_write.c:572
 ksys_read+0x12a/0x250 fs/read_write.c:715
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbff6b8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd206b5ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fbff6de5fa0 RCX: 00007fbff6b8f7c9
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fbff6c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbff6de5fa0 R14: 00007fbff6de5fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:status_show_vhci drivers/usb/usbip/vhci_sysfs.c:80 [inline]
RIP: 0010:status_show+0x30f/0x5a0 drivers/usb/usbip/vhci_sysfs.c:160
Code: 03 80 3c 02 00 0f 85 9c 02 00 00 48 8b 9b 88 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 08 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7d 02 00 00 4c 8b b3 08 04 00 00 c1 e5 04 41 bc
RSP: 0018:ffffc9000385fac0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87751278
RDX: 0000000000000081 RSI: ffffffff8775143e RDI: 0000000000000408
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 000000000000000f R11: 64666b636f732020 R12: ffff88803087402d
R13: ffffc9000385fb10 R14: ffff888030874000 R15: ffff88807941a958
FS:  0000555593cf5500(0000) GS:ffff888124b0d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563280a88950 CR3: 0000000075c1c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   6:	85 9c 02 00 00 48 8b 	test   %ebx,-0x74b80000(%rdx,%rax,1)
   d:	9b                   	fwait
   e:	88 00                	mov    %al,(%rax)
  10:	00 00                	add    %al,(%rax)
  12:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  19:	fc ff df
  1c:	48 8d bb 08 04 00 00 	lea    0x408(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 7d 02 00 00    	jne    0x2b1
  34:	4c 8b b3 08 04 00 00 	mov    0x408(%rbx),%r14
  3b:	c1 e5 04             	shl    $0x4,%ebp
  3e:	41                   	rex.B
  3f:	bc                   	.byte 0xbc