Hello, syzbot found the following issue on: HEAD commit: c88416ba074a Add linux-next specific files for 20241101 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12d34740580000 kernel config: https://syzkaller.appspot.com/x/.config?x=704b6be2ac2f205f dashboard link: https://syzkaller.appspot.com/bug?extid=5007209c85ecdb50b5da compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d34740580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/760a8c88d0c3/disk-c88416ba.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/46e4b0a851a2/vmlinux-c88416ba.xz kernel image: https://storage.googleapis.com/syzbot-assets/428e2c784b75/bzImage-c88416ba.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5007209c85ecdb50b5da@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================== WARNING: bad unlock balance detected! 6.12.0-rc5-next-20241101-syzkaller #0 Not tainted ------------------------------------- kworker/1:1/57 is trying to release lock (&q->q_usage_counter(queue)) at: [<ffffffff8497aa7f>] blk_mq_update_tag_set_shared+0x27f/0x350 block/blk-mq.c:4131 but there are no more locks to release! other info that might help us debug this: 7 locks held by kworker/1:1/57: #0: ffff888144aecd48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888144aecd48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9000101fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000101fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff8880284ce190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline] #2: ffff8880284ce190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849 #3: ffff888032eab190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff888032eab190 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2295 #4: ffff88807fd02160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline] #4: ffff88807fd02160 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff88807fd02160 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1293 #5: ffff8880334480e0 (&shost->scan_mutex){+.+.}-{4:4}, at: scsi_remove_host+0x34/0x770 drivers/scsi/hosts.c:169 #6: ffff8880334482d0 (&set->tag_list_lock){+.+.}-{4:4}, at: blk_mq_del_queue_tag_set block/blk-mq.c:4139 [inline] #6: ffff8880334482d0 (&set->tag_list_lock){+.+.}-{4:4}, at: blk_mq_exit_queue+0x1da/0x470 block/blk-mq.c:4461 stack backtrace: CPU: 1 UID: 0 PID: 57 Comm: kworker/1:1 Not tainted 6.12.0-rc5-next-20241101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_unlock_imbalance_bug+0x25b/0x2d0 kernel/locking/lockdep.c:5287 __lock_release kernel/locking/lockdep.c:5526 [inline] lock_release+0x5cb/0xa30 kernel/locking/lockdep.c:5870 blk_unfreeze_release_lock block/blk.h:745 [inline] blk_mq_unfreeze_queue+0xd2/0x140 block/blk-mq.c:213 blk_mq_update_tag_set_shared+0x27f/0x350 block/blk-mq.c:4131 blk_mq_del_queue_tag_set block/blk-mq.c:4145 [inline] blk_mq_exit_queue+0x3a4/0x470 block/blk-mq.c:4461 blk_mq_destroy_queue+0x1c1/0x220 block/blk-mq.c:4284 __scsi_remove_device+0x1f9/0x3c0 drivers/scsi/scsi_sysfs.c:1512 scsi_forget_host+0xcf/0x110 drivers/scsi/scsi_scan.c:2068 scsi_remove_host+0x1dd/0x770 drivers/scsi/hosts.c:181 quiesce_and_remove_host drivers/usb/storage/usb.c:949 [inline] usb_stor_disconnect+0x14e/0x1f0 drivers/usb/storage/usb.c:1178 usb_unbind_interface+0x25e/0x940 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x503/0x7c0 drivers/base/dd.c:1296 bus_remove_device+0x34f/0x420 drivers/base/bus.c:576 device_del+0x57a/0x9b0 drivers/base/core.c:3861 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1418 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2304 hub_port_connect drivers/usb/core/hub.c:5361 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x1ebc/0x5150 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> usb 1-1: new full-speed USB device number 3 using dummy_hcd usb 1-1: config 0 has an invalid interface number: 189 but max is 0 usb 1-1: config 0 has no interface number 0 usb 1-1: config 0 interface 189 altsetting 0 has an invalid descriptor for endpoint zero, skipping usb 1-1: config 0 interface 189 altsetting 0 has an endpoint descriptor with address 0xE3, changing to 0x83 usb 1-1: config 0 interface 189 altsetting 0 endpoint 0x83 has invalid maxpacket 33307, setting to 64 usb 1-1: config 0 interface 189 altsetting 0 endpoint 0xB has invalid wMaxPacketSize 0 usb 1-1: config 0 interface 189 altsetting 0 has 3 endpoint descriptors, different from the interface descriptor's value: 2 usb 1-1: New USB device found, idVendor=07b4, idProduct=010a, bcdDevice= 1.02 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?? ums-alauda 1-1:0.189: USB Mass Storage device detected scsi host2: usb-storage 1-1:0.189 usb 1-1: USB disconnect, device number 3 usb 1-1: new full-speed USB device number 4 using dummy_hcd usb 1-1: config 0 has an invalid interface number: 189 but max is 0 usb 1-1: config 0 has no interface number 0 usb 1-1: config 0 interface 189 altsetting 0 has an invalid descriptor for endpoint zero, skipping usb 1-1: config 0 interface 189 altsetting 0 has an endpoint descriptor with address 0xE3, changing to 0x83 usb 1-1: config 0 interface 189 altsetting 0 endpoint 0x83 has invalid maxpacket 33307, setting to 64 usb 1-1: config 0 interface 189 altsetting 0 endpoint 0xB has invalid wMaxPacketSize 0 usb 1-1: config 0 interface 189 altsetting 0 has 3 endpoint descriptors, different from the interface descriptor's value: 2 usb 1-1: New USB device found, idVendor=07b4, idProduct=010a, bcdDevice= 1.02 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?? ums-alauda 1-1:0.189: USB Mass Storage device detected scsi host1: usb-storage 1-1:0.189 --- This report is generated by a bot. 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