usb 9-1: Product: syz
usb 9-1: Manufacturer: syz
usb 9-1: SerialNumber: syz
ums_eneub6250 9-1:1.0: USB Mass Storage device detected
scsi host1: usb-storage 9-1:1.0
list_add double add: new=ffff8880257d0718, prev=ffff8880257d0718, next=ffff88807954a078.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:37!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 5739 Comm: kworker/1:4 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:__list_add_valid_or_report+0xa5/0x130 lib/list_debug.c:35
Code: 74 12 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 fd 2f 30 fc cc 48 c7 c7 60 fa 4b 8c 4c 89 fe 4c 89 f2 48 89 d9 e8 6c a9 47 fc 90 <0f> 0b 48 c7 c7 40 f8 4b 8c e8 5d a9 47 fc 90 0f 0b 48 c7 c7 00 f9
RSP: 0018:ffffc900044d69f8 EFLAGS: 00010046
RAX: 0000000000000058 RBX: ffff88807954a078 RCX: 603f2ea3fdcaf800
RDX: ffffc9001c2da000 RSI: 0000000000028a3a RDI: 0000000000028a3b
RBP: 1ffff1100f2a9410 R08: ffffc900044d6787 R09: 1ffff9200089acf0
R10: dffffc0000000000 R11: fffff5200089acf1 R12: 1ffff11004afa0e3
R13: dffffc0000000000 R14: ffff8880257d0718 R15: ffff8880257d0718
FS:  0000000000000000(0000) GS:ffff888125031000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005619417618b0 CR3: 0000000075287000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add_tail include/linux/list.h:191 [inline]
 usb_hcd_link_urb_to_ep+0x1d2/0x330 drivers/usb/core/hcd.c:1154
 dummy_urb_enqueue+0x2ad/0x780 drivers/usb/gadget/udc/dummy_hcd.c:1310
 usb_hcd_submit_urb+0x328/0x1b60 drivers/usb/core/hcd.c:1542
 usb_stor_msg_common+0x2a2/0x500 drivers/usb/storage/transport.c:143
 usb_stor_bulk_transfer_buf+0x155/0x7e0 drivers/usb/storage/transport.c:395
 ene_send_scsi_cmd+0x117/0x610 drivers/usb/storage/ene_ub6250.c:502
 ene_get_card_type drivers/usb/storage/ene_ub6250.c:1842 [inline]
 ene_ub6250_probe+0x459/0x5e0 drivers/usb/storage/ene_ub6250.c:2360
 usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396
 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:291
 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:2703
 hub_port_connect drivers/usb/core/hub.c:5575 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
 port_event drivers/usb/core/hub.c:5879 [inline]
 hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5961
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa88/0x14c0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 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>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xa5/0x130 lib/list_debug.c:35
Code: 74 12 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 fd 2f 30 fc cc 48 c7 c7 60 fa 4b 8c 4c 89 fe 4c 89 f2 48 89 d9 e8 6c a9 47 fc 90 <0f> 0b 48 c7 c7 40 f8 4b 8c e8 5d a9 47 fc 90 0f 0b 48 c7 c7 00 f9
RSP: 0018:ffffc900044d69f8 EFLAGS: 00010046
RAX: 0000000000000058 RBX: ffff88807954a078 RCX: 603f2ea3fdcaf800
RDX: ffffc9001c2da000 RSI: 0000000000028a3a RDI: 0000000000028a3b
RBP: 1ffff1100f2a9410 R08: ffffc900044d6787 R09: 1ffff9200089acf0
R10: dffffc0000000000 R11: fffff5200089acf1 R12: 1ffff11004afa0e3
R13: dffffc0000000000 R14: ffff8880257d0718 R15: ffff8880257d0718
FS:  0000000000000000(0000) GS:ffff888125031000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005619417618b0 CR3: 0000000075287000 CR4: 0000000000350ef0