usb 1-1: reset full-speed USB device number 2 using dummy_hcd usb 1-1: device descriptor read/64, error -71 usb 1-1: unable to get BOS descriptor or descriptor too short zd1211rw 1-1:0.22: phy1 zd1211rw 1-1:0.144: error ioread32(CR_REG1): -11 ============================================ WARNING: possible recursive locking detected 6.16.0-rc2-syzkaller-00033-g9962d0433a86 #0 Not tainted -------------------------------------------- kworker/1:1/38 is trying to acquire lock: ffff88811dbddc70 (&chip->mutex){+.+.}-{4:4}, at: zd_chip_disable_rxtx+0x1f/0x50 drivers/net/wireless/zydas/zd1211rw/zd_chip.c:1465 but task is already holding lock: ffff88811d8fdc70 (&chip->mutex){+.+.}-{4:4}, at: pre_reset+0x20b/0x280 drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1504 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&chip->mutex); lock(&chip->mutex); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by kworker/1:1/38: #0: ffff888106efe148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213 #1: ffffc90000287d10 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214 #2: ffff88810b37a198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:884 [inline] #2: ffff88810b37a198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1be/0x5030 drivers/usb/core/hub.c:5863 #3: ffff88811c9b8198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:884 [inline] #3: ffff88811c9b8198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7e/0x4b0 drivers/base/dd.c:1004 #4: ffff88811bffc160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:884 [inline] #4: ffff88811bffc160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7e/0x4b0 drivers/base/dd.c:1004 #5: ffff88811d8fdc70 (&chip->mutex){+.+.}-{4:4}, at: pre_reset+0x20b/0x280 drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1504 stack backtrace: CPU: 1 UID: 0 PID: 38 Comm: kworker/1:1 Not tainted 6.16.0-rc2-syzkaller-00033-g9962d0433a86 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_deadlock_bug+0x1e9/0x240 kernel/locking/lockdep.c:3044 check_deadlock kernel/locking/lockdep.c:3096 [inline] validate_chain kernel/locking/lockdep.c:3898 [inline] __lock_acquire+0x1106/0x1c90 kernel/locking/lockdep.c:5240 lock_acquire kernel/locking/lockdep.c:5871 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828 __mutex_lock_common kernel/locking/mutex.c:602 [inline] __mutex_lock+0x199/0xb90 kernel/locking/mutex.c:747 zd_chip_disable_rxtx+0x1f/0x50 drivers/net/wireless/zydas/zd1211rw/zd_chip.c:1465 zd_op_stop+0x6b/0x1a0 drivers/net/wireless/zydas/zd1211rw/zd_mac.c:343 zd_usb_stop drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1479 [inline] pre_reset+0x191/0x280 drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1502 usb_reset_device+0x419/0xa90 drivers/usb/core/hub.c:6363 probe+0x118/0x970 drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1371 usb_probe_interface+0x300/0x9c0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:657 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:957 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1a70 drivers/base/core.c:3692 usb_set_configuration+0x1187/0x1e20 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250 usb_probe_device+0xec/0x3e0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:657 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:957 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537 device_add+0x1148/0x1a70 drivers/base/core.c:3692 usb_new_device+0xd07/0x1a20 drivers/usb/core/hub.c:2663 hub_port_connect drivers/usb/core/hub.c:5535 [inline] hub_port_connect_change drivers/usb/core/hub.c:5675 [inline] port_event drivers/usb/core/hub.c:5835 [inline] hub_event+0x2f85/0x5030 drivers/usb/core/hub.c:5917 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5b3/0x6c0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 zd1211rw 1-1:0.22: error ioread32(CR_REG1): -11 usb 1-1: reset full-speed USB device number 2 using dummy_hcd usb 1-1: unable to get BOS descriptor or descriptor too short ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' zd1211rw 1-1:0.243: phy2 usb 1-1: new full-speed USB device number 3 using dummy_hcd usb 1-1: unable to get BOS descriptor or descriptor too short usb 1-1: not running at top speed; connect to a high speed hub usb 1-1: config 0 has an invalid interface number: 144 but max is 1 usb 1-1: config 0 has an invalid interface number: 22 but max is 1 usb 1-1: config 0 has an invalid interface association descriptor of length 2, skipping usb 1-1: config 0 contains an unexpected descriptor of type 0x2, skipping usb 1-1: config 0 has an invalid interface number: 243 but max is 1 usb 1-1: config 0 has 3 interfaces, different from the descriptor's value: 2 usb 1-1: config 0 has no interface number 0 usb 1-1: config 0 has no interface number 1 usb 1-1: config 0 has no interface number 2 usb 1-1: config 0 interface 144 altsetting 1 endpoint 0xC has invalid maxpacket 1023, setting to 64 usb 1-1: config 0 interface 144 altsetting 1 endpoint 0x4 has invalid maxpacket 1024, setting to 64 usb 1-1: config 0 interface 22 altsetting 0 endpoint 0xD has invalid maxpacket 1024, setting to 64 usb 1-1: config 0 interface 22 altsetting 0 has an invalid descriptor for endpoint zero, skipping usb 1-1: config 0 interface 22 altsetting 0 has a duplicate endpoint with address 0xC, skipping usb 1-1: config 0 interface 22 altsetting 0 endpoint 0x6 has invalid maxpacket 1024, setting to 64 usb 1-1: config 0 interface 22 altsetting 0 has a duplicate endpoint with address 0xD, skipping usb 1-1: config 0 interface 22 altsetting 0 has a duplicate endpoint with address 0x4, skipping usb 1-1: config 0 interface 22 altsetting 0 has a duplicate endpoint with address 0xD, skipping usb 1-1: config 0 interface 22 altsetting 0 has a duplicate endpoint with address 0xC, skipping usb 1-1: config 0 interface 22 altsetting 0 endpoint 0xA has invalid maxpacket 503, setting to 64 usb 1-1: config 0 interface 22 altsetting 0 has an invalid descriptor for endpoint zero, skipping usb 1-1: config 0 interface 22 altsetting 0 has a duplicate endpoint with address 0xE, skipping usb 1-1: config 0 interface 22 altsetting 0 endpoint 0x1 has invalid maxpacket 1024, setting to 64 usb 1-1: config 0 interface 22 altsetting 0 has an invalid descriptor for endpoint zero, skipping usb 1-1: config 0 interface 22 altsetting 0 has 13 endpoint descriptors, different from the interface descriptor's value: 16 usb 1-1: too many endpoints for config 0 interface 243 altsetting 168: 112, using maximum allowed: 30 usb 1-1: config 0 interface 243 altsetting 168 has a duplicate endpoint with address 0x6, skipping usb 1-1: config 0 interface 243 altsetting 168 endpoint 0xF has invalid maxpacket 512, setting to 64 usb 1-1: config 0 interface 243 altsetting 168 has an invalid descriptor for endpoint zero, skipping usb 1-1: config 0 interface 243 altsetting 168 has 3 endpoint descriptors, different from the interface descriptor's value: 112 usb 1-1: config 0 interface 144 has no altsetting 0 usb 1-1: config 0 interface 243 has no altsetting 0 usb 1-1: string descriptor 0 read error: -22 usb 1-1: New USB device found, idVendor=0471, idProduct=1237, bcdDevice=d0.1f usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1: config 0 descriptor?? usb 1-1: reset full-speed USB device number 3 using dummy_hcd usb 1-1: device descriptor read/64, error -71 usb 1-1: unable to get BOS descriptor or descriptor too short ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' zd1211rw 1-1:0.144: phy3 zd1211rw 1-1:0.144: error ioread32(CR_REG1): -11 usb 1-1: reset full-speed USB device number 3 using dummy_hcd usb 1-1: device descriptor read/64, error -71 usb 1-1: unable to get BOS descriptor or descriptor too short ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' zd1211rw 1-1:0.22: phy4 zd1211rw 1-1:0.144: error ioread32(CR_REG1): -11 zd1211rw 1-1:0.22: error ioread32(CR_REG1): -11 usb 1-1: reset full-speed USB device number 3 using dummy_hcd usb 1-1: device descriptor read/64, error -71 usb 1-1: unable to get BOS descriptor or descriptor too short ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' zd1211rw 1-1:0.243: phy5 usb 1-1: USB disconnect, device number 3