Extracting prog: 7m40.190573674s
Minimizing prog: 35m32.488711708s
Simplifying prog options: 25m31.445267869s
Extracting C: 5m14.082354376s
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:5 Slowdown:1 Sandbox:namespace 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, &(0x7f0000000000))

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:5 Slowdown:1 Sandbox:namespace 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, &(0x7f0000000000))

program crashed: WARNING in dev_shutdown
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=7m47.59177159s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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
validation run: crashed=false
testing program (duration=7m47.59177159s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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 1h35m5.339372107s
repro crashed as (corrupted=false):
net1080 3-1:0.166 usb0: unregister 'net1080' usb-dummy_hcd.2-1, NetChip TurboCONNECT
------------[ cut here ]------------
timer_pending(&dev->watchdog_timer)
WARNING: net/sched/sch_generic.c:1518 at dev_shutdown+0x3ea/0x450 net/sched/sch_generic.c:1518, CPU#1: kworker/1:7/5949
Modules linked in:
CPU: 1 UID: 0 PID: 5949 Comm: kworker/1:7 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:dev_shutdown+0x3ea/0x450 net/sched/sch_generic.c:1518
Code: 4c 49 70 f8 49 83 7d 00 00 75 19 e8 f0 ac 02 f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 d7 ac 02 f8 90 <0f> 0b 90 eb e1 e8 cc ac 02 f8 4c 89 e7 be 03 00 00 00 e8 8f 11 0f
RSP: 0018:ffffc900033cf1a0 EFLAGS: 00010293
RAX: ffffffff89c454b9 RBX: 0000000000000001 RCX: ffff888030641f00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888072360570 R08: ffffc900033cefc7 R09: 1ffff92000679df8
R10: dffffc0000000000 R11: fffff52000679df9 R12: ffffffff90074fd0
R13: ffff888072360650 R14: 1ffff1100e46c0ae R15: ffffffff90074fc0
FS:  0000000000000000(0000) GS:ffff888125049000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1cb2db9600 CR3: 000000007f6e2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x11f4/0x2140 net/core/dev.c:12439
 unregister_netdevice_many net/core/dev.c:12513 [inline]
 unregister_netdevice_queue net/core/dev.c:12324 [inline]
 unregister_netdevice include/linux/netdevice.h:3474 [inline]
 unregister_netdev+0x155/0x1f0 net/core/dev.c:12531
 usbnet_disconnect+0xcd/0x390 drivers/net/usb/usbnet.c:1681
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:458
 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:3961
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5415 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
 port_event drivers/usb/core/hub.c:5879 [inline]
 hub_event+0x1bbb/0x4d30 drivers/usb/core/hub.c:5961
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 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):
net1080 3-1:0.166 usb0: unregister 'net1080' usb-dummy_hcd.2-1, NetChip TurboCONNECT
------------[ cut here ]------------
timer_pending(&dev->watchdog_timer)
WARNING: net/sched/sch_generic.c:1518 at dev_shutdown+0x3ea/0x450 net/sched/sch_generic.c:1518, CPU#1: kworker/1:7/5949
Modules linked in:
CPU: 1 UID: 0 PID: 5949 Comm: kworker/1:7 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:dev_shutdown+0x3ea/0x450 net/sched/sch_generic.c:1518
Code: 4c 49 70 f8 49 83 7d 00 00 75 19 e8 f0 ac 02 f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 d7 ac 02 f8 90 <0f> 0b 90 eb e1 e8 cc ac 02 f8 4c 89 e7 be 03 00 00 00 e8 8f 11 0f
RSP: 0018:ffffc900033cf1a0 EFLAGS: 00010293
RAX: ffffffff89c454b9 RBX: 0000000000000001 RCX: ffff888030641f00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888072360570 R08: ffffc900033cefc7 R09: 1ffff92000679df8
R10: dffffc0000000000 R11: fffff52000679df9 R12: ffffffff90074fd0
R13: ffff888072360650 R14: 1ffff1100e46c0ae R15: ffffffff90074fc0
FS:  0000000000000000(0000) GS:ffff888125049000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1cb2db9600 CR3: 000000007f6e2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x11f4/0x2140 net/core/dev.c:12439
 unregister_netdevice_many net/core/dev.c:12513 [inline]
 unregister_netdevice_queue net/core/dev.c:12324 [inline]
 unregister_netdevice include/linux/netdevice.h:3474 [inline]
 unregister_netdev+0x155/0x1f0 net/core/dev.c:12531
 usbnet_disconnect+0xcd/0x390 drivers/net/usb/usbnet.c:1681
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:458
 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:3961
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5415 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5715 [inline]
 port_event drivers/usb/core/hub.c:5879 [inline]
 hub_event+0x1bbb/0x4d30 drivers/usb/core/hub.c:5961
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 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>