ax88179_178a 1-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
ax88179_178a 1-1:0.0 eth0: register 'ax88179_178a' at usb-dummy_hcd.0-1, MCT USB 3.0 Gigabit Ethernet Adapter, 4e:49:26:88:5f:67
usb 1-1: USB disconnect, device number 2
Unable to handle kernel paging request at virtual address dfff800000000002
Mem abort info:
ESR = 0x0000000096000006
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x06: level 2 translation fault
Data abort info:
ISV = 0, ISS = 0x00000006
CM = 0, WnR = 0
[dfff800000000002] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted 5.15.146-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: usb_hub_wq hub_event
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ax88179_disconnect+0x70/0xb8 drivers/net/usb/ax88179_178a.c:531
lr : ax88179_disconnect+0x48/0xb8 drivers/net/usb/ax88179_178a.c:530
sp : ffff8000189f73b0
x29: ffff8000189f73b0 x28: ffff800015ff12e0 x27: ffff0000ca7ab000
x26: 0000000000000001 x25: ffff0000ca7ab0a8 x24: ffff0000c2f32030
x23: ffff800015ff1248 x22: ffff800015ff11b0 x21: dfff800000000000
x20: 0000000000000010 x19: ffff0000c2f32000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000088ca890 x15: 0000000000000003
x14: 1ffff0000292406a x13: dfff800000000000 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000002 x7 : ffff80000d6fc634 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800011a46b7c
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c2f32000
Call trace:
ax88179_disconnect+0x70/0xb8 drivers/net/usb/ax88179_178a.c:531
usb_unbind_interface+0x1a4/0x758 drivers/usb/core/driver.c:458
__device_release_driver drivers/base/dd.c:1229 [inline]
device_release_driver_internal+0x464/0x6ac drivers/base/dd.c:1262
device_release_driver+0x28/0x38 drivers/base/dd.c:1285
bus_remove_device+0x298/0x38c drivers/base/bus.c:529
device_del+0x57c/0x9b4 drivers/base/core.c:3582
usb_disable_device+0x354/0x760 drivers/usb/core/message.c:1414
usb_disconnect+0x290/0x7e8 drivers/usb/core/hub.c:2239
hub_port_connect drivers/usb/core/hub.c:5281 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5577 [inline]
port_event drivers/usb/core/hub.c:5723 [inline]
hub_event+0x1718/0x47d4 drivers/usb/core/hub.c:5805
process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
process_scheduled_works kernel/workqueue.c:2373 [inline]
worker_thread+0xb88/0x1034 kernel/workqueue.c:2459
kthread+0x37c/0x45c kernel/kthread.c:319
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Code: f9400288 91004114 d343fe88 12000a89 (38f56908)
---[ end trace 3c75c3d4bd6cee55 ]---
----------------
Code disassembly (best guess):
0: f9400288 ldr x8, [x20]
4: 91004114 add x20, x8, #0x10
8: d343fe88 lsr x8, x20, #3
c: 12000a89 and w9, w20, #0x7
* 10: 38f56908 ldrsb w8, [x8, x21] <-- trapping instruction