------------[ cut here ]------------
timer_delete_sync(&sdp->delay_work) && rcu_segcblist_n_cbs(&sdp->srcu_cblist)
WARNING: kernel/rcu/srcutree.c:707 at cleanup_srcu_struct+0x3d6/0x8b0 kernel/rcu/srcutree.c:706, CPU#0: kworker/0:4/5786
Modules linked in:
CPU: 0 UID: 0 PID: 5786 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:cleanup_srcu_struct+0x3d6/0x8b0 kernel/rcu/srcutree.c:706
Code: 0a 8c 00 48 83 7d 00 00 4c 8b 74 24 10 0f 85 dd 03 00 00 41 ff c5 41 83 e5 0f 41 83 fd 07 0f 86 e2 fe ff ff e9 ab 00 00 00 90 <0f> 0b 90 4c 8d b5 00 02 00 00 4c 89 f3 48 c1 eb 03 48 b8 00 00 00
RSP: 0018:ffffc900037bf2b8 EFLAGS: 00010206
RAX: 1ffffd1ffff871e5 RBX: 0000607edaf6be40 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: ffffffff8e414afd RDI: 00000000ffffffff
RBP: ffffe8ffffc38e40 R08: ffffffff907a507f R09: 1ffffffff20f4a0f
R10: dffffc0000000000 R11: fffffbfff20f4a10 R12: ffff88807cce0800
R13: 0000000000000000 R14: ffffe8ffffc38f28 R15: 1ffffffff1cdcfde
FS:  0000000000000000(0000) GS:ffff888124ccd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc84262a008 CR3: 000000000eb48000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 blk_mq_free_tag_set+0x617/0x790 block/blk-mq.c:4976
 scsi_mq_free_tags+0x16/0x30 drivers/scsi/scsi_lib.c:2167
 kref_put include/linux/kref.h:65 [inline]
 scsi_remove_host+0x243/0x730 drivers/scsi/hosts.c:193
 quiesce_and_remove_host drivers/usb/storage/usb.c:949 [inline]
 usb_stor_disconnect+0x14f/0x1f0 drivers/usb/storage/usb.c:1186
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:618 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x444/0x560 drivers/base/bus.c:664
 device_del+0x524/0x8f0 drivers/base/core.c:3965
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2350
 hub_port_connect drivers/usb/core/hub.c:5420 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5720 [inline]
 port_event drivers/usb/core/hub.c:5884 [inline]
 hub_event+0x1bbb/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>