Extracting prog: 4m39.355518268s
Minimizing prog: 26m57.125909427s
Simplifying prog options: 13m21.950687615s
Extracting C: 5m16.833125194s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {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-syz_usb_control_io-syz_io_uring_submit
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_io_uring_submit(0x0, 0x0, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 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-syz_usb_control_io-syz_io_uring_submit
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_io_uring_submit(0x0, 0x0, 0x0)

program crashed: WARNING in dev_shutdown
single: successfully extracted reproducer
found reproducer with 3 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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: WARNING in dev_shutdown
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, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 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_control_io
detailed listing:
executing program 0:
syz_usb_control_io(0xffffffffffffffff, 0x0, 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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB], 0x0)
syz_usb_control_io(r0, 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-syz_usb_control_io
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: WARNING in dev_shutdown
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-syz_usb_control_io
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: WARNING in dev_shutdown
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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: WARNING in dev_shutdown
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-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x36, &(0x7f0000000080)=ANY=[@ANYBLOB="120100009880a420d00622065a3f010203010902240001000010000904a6000209abe0000905020200020200000905820210000000"], 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: WARNING in dev_shutdown
validation run: crashed=true
reproducing took 54m49.358649328s
repro crashed as (corrupted=false):
net1080 3-1:0.166 usb0: unregister 'net1080' usb-dummy_hcd.2-1, NetChip TurboCONNECT
------------[ cut here ]------------
WARNING: net/sched/sch_generic.c:1496 at dev_shutdown+0x3e1/0x440 net/sched/sch_generic.c:1496, CPU#1: kworker/1:7/6052
Modules linked in:
CPU: 1 UID: 0 PID: 6052 Comm: kworker/1:7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:dev_shutdown+0x3e1/0x440 net/sched/sch_generic.c:1496
Code: e5 6d c3 f8 49 83 7d 00 00 75 19 e8 09 0b 5d f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 46 8f 03 02 cc e8 f0 0a 5d f8 90 <0f> 0b 90 eb e1 e8 e5 0a 5d f8 4c 89 e7 be 03 00 00 00 e8 58 22 33
RSP: 0018:ffffc90002f271a0 EFLAGS: 00010293
RAX: ffffffff8964ec60 RBX: ffff88802dc8c4e0 RCX: ffff88802f8e3d00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc90002f26f87 R09: 1ffff920005e4df0
R10: dffffc0000000000 R11: fffff520005e4df1 R12: ffffffff8f774bd0
R13: ffff88802dc8c5c0 R14: 1ffff11005b9189c R15: ffffffff8f774bc0
FS:  0000000000000000(0000) GS:ffff888125ae6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f605c3144b4 CR3: 0000000034fd6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x11b3/0x2340 net/core/dev.c:12388
 unregister_netdevice_many net/core/dev.c:12463 [inline]
 unregister_netdevice_queue net/core/dev.c:12277 [inline]
 unregister_netdevice include/linux/netdevice.h:3411 [inline]
 unregister_netdev+0x157/0x1f0 net/core/dev.c:12481
 usbnet_disconnect+0xcd/0x390 drivers/net/usb/usbnet.c:1676
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1282 [inline]
 device_release_driver_internal+0x4d9/0x800 drivers/base/dd.c:1305
 bus_remove_device+0x34d/0x440 drivers/base/bus.c:616
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3d4/0x8e0 drivers/usb/core/message.c:1418
 usb_disconnect+0x32f/0x990 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1ca9/0x4ef0 drivers/usb/core/hub.c:5953
 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

final repro crashed as (corrupted=false):
net1080 3-1:0.166 usb0: unregister 'net1080' usb-dummy_hcd.2-1, NetChip TurboCONNECT
------------[ cut here ]------------
WARNING: net/sched/sch_generic.c:1496 at dev_shutdown+0x3e1/0x440 net/sched/sch_generic.c:1496, CPU#1: kworker/1:7/6052
Modules linked in:
CPU: 1 UID: 0 PID: 6052 Comm: kworker/1:7 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:dev_shutdown+0x3e1/0x440 net/sched/sch_generic.c:1496
Code: e5 6d c3 f8 49 83 7d 00 00 75 19 e8 09 0b 5d f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 46 8f 03 02 cc e8 f0 0a 5d f8 90 <0f> 0b 90 eb e1 e8 e5 0a 5d f8 4c 89 e7 be 03 00 00 00 e8 58 22 33
RSP: 0018:ffffc90002f271a0 EFLAGS: 00010293
RAX: ffffffff8964ec60 RBX: ffff88802dc8c4e0 RCX: ffff88802f8e3d00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc90002f26f87 R09: 1ffff920005e4df0
R10: dffffc0000000000 R11: fffff520005e4df1 R12: ffffffff8f774bd0
R13: ffff88802dc8c5c0 R14: 1ffff11005b9189c R15: ffffffff8f774bc0
FS:  0000000000000000(0000) GS:ffff888125ae6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f605c3144b4 CR3: 0000000034fd6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x11b3/0x2340 net/core/dev.c:12388
 unregister_netdevice_many net/core/dev.c:12463 [inline]
 unregister_netdevice_queue net/core/dev.c:12277 [inline]
 unregister_netdevice include/linux/netdevice.h:3411 [inline]
 unregister_netdev+0x157/0x1f0 net/core/dev.c:12481
 usbnet_disconnect+0xcd/0x390 drivers/net/usb/usbnet.c:1676
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1282 [inline]
 device_release_driver_internal+0x4d9/0x800 drivers/base/dd.c:1305
 bus_remove_device+0x34d/0x440 drivers/base/bus.c:616
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3d4/0x8e0 drivers/usb/core/message.c:1418
 usb_disconnect+0x32f/0x990 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1ca9/0x4ef0 drivers/usb/core/hub.c:5953
 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>