Extracting prog: 5m8.564458314s
Minimizing prog: 1h6m12.52666541s
Simplifying prog options: 10m43.182960779s
Extracting C: 38.225652605s
Simplifying C: 0s


extracting reproducer from 6 programs
testing a last program of every proc
single: executing 6 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x0, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x1, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x2, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x3, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x4, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x5, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x0, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x1, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x2, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x3, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x4, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x0, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x1, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x2, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x3, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep-syz_open_dev$evdev-syz_open_dev$evdev-syz_open_dev$evdev
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x0, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x1, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x2, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep-syz_open_dev$evdev-syz_open_dev$evdev
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x0, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x1, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep-syz_open_dev$evdev
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)
syz_open_dev$evdev(&(0x7f0000000200), 0x0, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): nanosleep
detailed listing:
executing program 0:
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, 0x0, 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
program did not crash
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
program did not crash
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-nanosleep
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x39, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040490d007000010102030109022700010100c03209040000030806500007058102000200070502020002000705830340000a"], 0x0)
nanosleep(&(0x7f0000000100)={0x1}, 0x0)

program crashed: WARNING in blk_mq_free_tag_set
validation run: crashed=true
reproducing took 1h30m40.085959718s
repro crashed as (corrupted=false):
usb 1-1: USB disconnect, device number 9
------------[ 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/0:2/189
Modules linked in:
CPU: 0 UID: 0 PID: 189 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:cleanup_srcu_struct+0x3d6/0x8b0 kernel/rcu/srcutree.c:706
Code: c5 8b 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:ffffc90002f5f2b8 EFLAGS: 00010206
RAX: 1ffffd1ffff882bd RBX: 0000607edb3b2500 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: ffffffff8e58506b RDI: 00000000ffffffff
RBP: ffffe8ffffc41500 R08: ffffffff909b917f R09: 1ffffffff213722f
R10: dffffc0000000000 R11: fffffbfff2137230 R12: ffff88807fc75000
R13: 0000000000000000 R14: ffffe8ffffc415e8 R15: 1ffffffff1d0b1de
FS:  0000000000000000(0000) GS:ffff88812488f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f253cfeb7c0 CR3: 000000007792e000 CR4: 00000000003526f0
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:3387 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551
 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>

final repro crashed as (corrupted=false):
usb 1-1: USB disconnect, device number 9
------------[ 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/0:2/189
Modules linked in:
CPU: 0 UID: 0 PID: 189 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:cleanup_srcu_struct+0x3d6/0x8b0 kernel/rcu/srcutree.c:706
Code: c5 8b 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:ffffc90002f5f2b8 EFLAGS: 00010206
RAX: 1ffffd1ffff882bd RBX: 0000607edb3b2500 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: ffffffff8e58506b RDI: 00000000ffffffff
RBP: ffffe8ffffc41500 R08: ffffffff909b917f R09: 1ffffffff213722f
R10: dffffc0000000000 R11: fffffbfff2137230 R12: ffff88807fc75000
R13: 0000000000000000 R14: ffffe8ffffc415e8 R15: 1ffffffff1d0b1de
FS:  0000000000000000(0000) GS:ffff88812488f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f253cfeb7c0 CR3: 000000007792e000 CR4: 00000000003526f0
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:3387 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551
 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>