rtl_usb: rx_max_size 15360, rx_urb_num 8, in_ep 1 ============================= WARNING: suspicious RCU usage 5.11.0-rc1-syzkaller #0 Not tainted ----------------------------- net/wireless/reg.c:144 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 5 locks held by kworker/0:7/10420: #0: ffff888103f67138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888103f67138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888103f67138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888103f67138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888103f67138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888103f67138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x871/0x1580 kernel/workqueue.c:2246 #1: ffffc90014497da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1580 kernel/workqueue.c:2250 #2: ffff8881091f2218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:725 [inline] #2: ffff8881091f2218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x42d0 drivers/usb/core/hub.c:5537 #3: ffff8881304f9218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:725 [inline] #3: ffff8881304f9218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:894 #4: ffff888110a991a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:725 [inline] #4: ffff888110a991a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:894 stack backtrace: CPU: 0 PID: 10420 Comm: kworker/0:7 Not tainted 5.11.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 get_wiphy_regdom net/wireless/reg.c:144 [inline] get_wiphy_regdom+0xc3/0xd0 net/wireless/reg.c:142 wiphy_apply_custom_regulatory+0x234/0x360 net/wireless/reg.c:2574 _rtl_regd_init_wiphy drivers/net/wireless/realtek/rtlwifi/regd.c:343 [inline] rtl_regd_init+0x36d/0x760 drivers/net/wireless/realtek/rtlwifi/regd.c:421 rtl_init_core+0x83e/0x1a30 drivers/net/wireless/realtek/rtlwifi/base.c:539 rtl_usb_probe.cold+0x76b/0xac1 drivers/net/wireless/realtek/rtlwifi/usb.c:1060 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 really_probe+0x291/0xde0 drivers/base/dd.c:561 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:745 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:851 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x228/0x4a0 drivers/base/dd.c:919 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xbc4/0x1d90 drivers/base/core.c:3091 usb_set_configuration+0x113c/0x1910 drivers/usb/core/message.c:2164 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293 really_probe+0x291/0xde0 drivers/base/dd.c:561 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:745 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:851 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x228/0x4a0 drivers/base/dd.c:919 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xbc4/0x1d90 drivers/base/core.c:3091 usb_new_device.cold+0x71d/0xfe9 drivers/usb/core/hub.c:2555 hub_port_connect drivers/usb/core/hub.c:5223 [inline] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] port_event drivers/usb/core/hub.c:5509 [inline] hub_event+0x2348/0x42d0 drivers/usb/core/hub.c:5591 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x38c/0x460 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin usb 4-1: USB disconnect, device number 61 usb 4-1: new high-speed USB device number 62 using dummy_hcd usb 4-1: Using ep0 maxpacket: 8 usb 4-1: config 1 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 0 usb 4-1: language id specifier not provided by device, defaulting to English usb 4-1: New USB device found, idVendor=24b8, idProduct=0020, bcdDevice= 0.40 usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 4-1: Product: syz usb 4-1: Manufacturer: 坉⍯皫ⶪᚢ퇏ɣ਻튮㤬쨮㳛Ꝩ࣍萳﬍鸞Ȧ䟻ނᲭ孥鬋枇＿⠘힃琜॥ℾ點㧳蕭㵴嚮䪺詭拪耾궖鞱␌坿 usb 4-1: SerialNumber: syz usbhid 4-1:1.0: couldn't find an input interrupt endpoint usb 1-1: new full-speed USB device number 75 using dummy_hcd usb 1-1: config 0 interface 0 altsetting 0 endpoint 0xB has invalid wMaxPacketSize 0 usb 1-1: New USB device found, idVendor=1b3d, idProduct=01e5, bcdDevice=eb.4c 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?? usb 1-1: can't set config #0, error -71 usb 1-1: USB disconnect, device number 75 usb 1-1: new high-speed USB device number 76 using dummy_hcd usb 1-1: Using ep0 maxpacket: 8 usb 1-1: New USB device found, idVendor=06f8, idProduct=3003, bcdDevice=25.6f usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? gspca_main: ov534_9-2.14.0 probing 06f8:3003 gspca_ov534_9: reg_r err -32 gspca_ov534_9: Unknown sensor 0000 ov534_9: probe of 1-1:0.0 failed with error -22 usb 2-1: new high-speed USB device number 77 using dummy_hcd usb 2-1: config 1 has an invalid descriptor of length 1, skipping remainder of the config usb 2-1: config 1 has 2 interfaces, different from the descriptor's value: 3 usb 2-1: config 1 has no interface number 1 usb 2-1: too many endpoints for config 1 interface 2 altsetting 214: 98, using maximum allowed: 30 usb 2-1: config 1 interface 2 altsetting 214 has 0 endpoint descriptors, different from the interface descriptor's value: 98 usb 2-1: config 1 interface 2 has no altsetting 0