asix 6-1:0.188 (unnamed net_device) (uninitialized): validation of internal with support 00000000,00000000,00000000,00006280 and advertisement 00000000,00000000,00000000,00006280 failed: -EINVAL
asix 6-1:0.188 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
=============================
WARNING: suspicious RCU usage
syzkaller #0 Not tainted
-----------------------------
drivers/net/phy/phy_device.c:1944 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
locks held by kworker/0:0/9: 5, last CPU#0:
 #0: ffff888020aa9540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff888020aa9540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff888020aa9540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline]
 #0: ffff888020aa9540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479
 #1: ffffc900000e7c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc900000e7c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc900000e7c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline]
 #1: ffffc900000e7c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479
 #2: ffff888029de41d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #2: ffff888029de41d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5912
 #3: ffff888034c631d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #3: ffff888034c631d8 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #4: ffff888034c601a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #4: ffff888034c601a0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073

stack backtrace:
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6972
 phy_detach+0x219/0x550 drivers/net/phy/phy_device.c:1944
 phylink_connect_phy+0x1dc/0x300 drivers/net/phy/phylink.c:2267
 ax88772_init_phy+0xe3/0x390 drivers/net/usb/asix_devices.c:714
 ax88772_bind+0x9cb/0xe50 drivers/net/usb/asix_devices.c:925
 usbnet_probe+0xab3/0x2ad0 drivers/net/usb/usbnet.c:1808
 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3776
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3776
 usb_new_device+0x9aa/0x1690 drivers/usb/core/hub.c:2708
 hub_port_connect drivers/usb/core/hub.c:5580 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5720 [inline]
 port_event drivers/usb/core/hub.c:5884 [inline]
 hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5966
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>
asix 6-1:0.188 (unnamed net_device) (uninitialized): Could not connect PHY
asix 6-1:0.188: probe with driver asix failed with error -22
usb 6-1: USB disconnect, device number 6
usb 6-1: new high-speed USB device number 7 using dummy_hcd
usb 6-1: Using ep0 maxpacket: 32
usb 6-1: New USB device found, idVendor=17ef, idProduct=7203, bcdDevice=2e.36
usb 6-1: config 0 has an invalid interface number: 188 but max is 0
usb 6-1: config 0 has no interface number 0
usb 6-1: config 0 interface 188 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 32
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: syz
usb 6-1: Manufacturer: syz
usb 6-1: SerialNumber: syz
usb 6-1: config 0 descriptor??
asix 6-1:0.188 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -32
asix 6-1:0.188: probe with driver asix failed with error -32
usb 1-1: USB disconnect, device number 7
usb 1-1: new high-speed USB device number 8 using dummy_hcd
usb 1-1: Using ep0 maxpacket: 32
usb 1-1: New USB device found, idVendor=17ef, idProduct=7203, bcdDevice=2e.36
usb 1-1: config 0 has an invalid interface number: 188 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: config 0 interface 188 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 32
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
asix 1-1:0.188 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -32
asix 1-1:0.188: probe with driver asix failed with error -32
usb 3-1: USB disconnect, device number 7
usb 3-1: new high-speed USB device number 8 using dummy_hcd
usb 3-1: Using ep0 maxpacket: 32
usb 3-1: New USB device found, idVendor=17ef, idProduct=7203, bcdDevice=2e.36
usb 3-1: config 0 has an invalid interface number: 188 but max is 0
usb 3-1: config 0 has no interface number 0
usb 3-1: config 0 interface 188 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 32
usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-1: Product: syz
usb 3-1: Manufacturer: syz
usb 3-1: SerialNumber: syz
usb 3-1: config 0 descriptor??
asix 3-1:0.188 (unnamed net_device) (uninitialized): invalid hw address, using random
asix 3-1:0.188 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -32
asix 3-1:0.188: probe with driver asix failed with error -32
usb 6-1: USB disconnect, device number 8
usb 6-1: new high-speed USB device number 9 using dummy_hcd
usb 6-1: Using ep0 maxpacket: 32
usb 6-1: New USB device found, idVendor=17ef, idProduct=7203, bcdDevice=2e.36
usb 6-1: config 0 has an invalid interface number: 188 but max is 0
usb 6-1: config 0 has no interface number 0
usb 6-1: config 0 interface 188 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 32
usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 6-1: Product: syz
usb 6-1: Manufacturer: syz
usb 6-1: SerialNumber: syz
usb 6-1: config 0 descriptor??
asix 6-1:0.188 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -32
asix 6-1:0.188: probe with driver asix failed with error -32