sd 0:0:1:0: [sda] Synchronizing SCSI cache
------------[ cut here ]------------
timer_delete_sync(&sdp->delay_work)
WARNING: kernel/rcu/srcutree.c:706 at cleanup_srcu_struct+0x3aa/0x890 kernel/rcu/srcutree.c:706, CPU#0: syz.4.53/6017
Modules linked in:
CPU: 0 UID: 0 PID: 6017 Comm: syz.4.53 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:cleanup_srcu_struct+0x3aa/0x890 kernel/rcu/srcutree.c:706
Code: d0 8a 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 0e ff 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:ffffc9000556f670 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000607edad05d80 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8e252afe RDI: 00000000ffffffff
RBP: ffffe8ffffc17d80 R08: ffffffff9058aa7f R09: 1ffffffff20b154f
R10: dffffc0000000000 R11: fffffbfff20b1550 R12: ffff8880282cc000
R13: 0000000000000000 R14: ffffffff8e5227d0 R15: 1ffffffff1ca45de
FS:  00007fa81ca7e6c0(0000) GS:ffff888124f12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000c000 CR3: 000000001caa4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_mq_free_tag_set+0x617/0x780 block/blk-mq.c:4976
 scsi_mq_free_tags+0x16/0x30 drivers/scsi/scsi_lib.c:2166
 kref_put include/linux/kref.h:65 [inline]
 scsi_remove_host+0x228/0x730 drivers/scsi/hosts.c:192
 virtscsi_remove+0xdf/0x160 drivers/scsi/virtio_scsi.c:1007
 virtio_dev_remove+0x9c/0x1b0 drivers/virtio/virtio.c:375
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/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
 device_unregister+0x21/0xf0 drivers/base/core.c:4006
 unregister_virtio_device+0x37/0x60 drivers/virtio/virtio.c:607
 virtio_pci_remove+0x7f/0xf0 drivers/virtio/virtio_pci_common.c:758
 pci_device_remove+0x99/0x1c0 drivers/pci/pci-driver.c:535
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372
 pci_stop_dev drivers/pci/remove.c:27 [inline]
 pci_stop_bus_device+0xf6/0x120 drivers/pci/remove.c:93
 pci_stop_and_remove_bus_device drivers/pci/remove.c:128 [inline]
 pci_stop_and_remove_bus_device_locked+0x77/0xb0 drivers/pci/remove.c:136
 remove_store+0xe5/0x150 drivers/pci/pci-sysfs.c:524
 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x510 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa81bb9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa81ca7e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa81be25fa0 RCX: 00007fa81bb9e0d9
RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000006
RBP: 00007fa81bc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa81be26038 R14: 00007fa81be25fa0 R15: 00007ffcc2082668
 </TASK>