Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 6729 Comm: vhci_tx Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:setup_cmd_submit_pdu drivers/usb/usbip/vhci_tx.c:16 [inline]
RIP: 0010:vhci_send_cmd_submit+0x229/0x10c0 drivers/usb/usbip/vhci_tx.c:95
Code: e8 5c 28 5e fa 48 8d 7b 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 c4 0c 00 00 48 8b 6b 08 48 8d 7d 18 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 a0 0c 00 00 48 c7 c0 e0 3c 25 9b 4c 8b 6d 18
RSP: 0018:ffffc9001b8a7ae8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff88805629d900 RCX: ffffffff87a8d2ca
RDX: ffff888030cbc980 RSI: ffffffff87a8d304 RDI: 0000000000000018
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000075a9 R12: ffff88807502dd80
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88805629d984
FS: 0000000000000000(0000) GS:ffff8881246db000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc88acbd58 CR3: 000000000e392000 CR4: 00000000003526f0
Call Trace:
<TASK>
vhci_tx_loop+0xff/0x460 drivers/usb/usbip/vhci_tx.c:241
kthread+0x3b3/0x730 kernel/kthread.c:463
ret_from_fork+0x754/0xaf0 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+0x229/0x10c0 drivers/usb/usbip/vhci_tx.c:95
Code: e8 5c 28 5e fa 48 8d 7b 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 c4 0c 00 00 48 8b 6b 08 48 8d 7d 18 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 a0 0c 00 00 48 c7 c0 e0 3c 25 9b 4c 8b 6d 18
RSP: 0018:ffffc9001b8a7ae8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff88805629d900 RCX: ffffffff87a8d2ca
RDX: ffff888030cbc980 RSI: ffffffff87a8d304 RDI: 0000000000000018
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000075a9 R12: ffff88807502dd80
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88805629d984
FS: 0000000000000000(0000) GS:ffff8881246db000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fb21ff6 CR3: 0000000034dbd000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: e8 5c 28 5e fa call 0xfa5e2861
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: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
15: 0f 85 c4 0c 00 00 jne 0xcdf
1b: 48 8b 6b 08 mov 0x8(%rbx),%rbp
1f: 48 8d 7d 18 lea 0x18(%rbp),%rdi
23: 48 89 f8 mov %rdi,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 0f 85 a0 0c 00 00 jne 0xcd5
35: 48 c7 c0 e0 3c 25 9b mov $0xffffffff9b253ce0,%rax
3c: 4c 8b 6d 18 mov 0x18(%rbp),%r13