Extracting prog: 9m4.537401474s
Minimizing prog: 6m11.476849367s
Simplifying prog options: 12m23.55409851s
Extracting C: 5m15.959413485s
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:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
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:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program crashed: WARNING in kernfs_get
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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
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=6m1.699268206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
testing program (duration=6m1.699268206s, {Threaded:true 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
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program crashed: WARNING in kernfs_get
validation run: crashed=true
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program crashed: WARNING in kernfs_get
validation run: crashed=true
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=6m1.699268206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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, 0x24, &(0x7f0000000080)={{0x12, 0x1, 0x0, 0x52, 0x83, 0x43, 0x40, 0x5cc, 0x3362, 0xa38f, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0x0, 0x0, 0x0, [{{0x9, 0x4, 0x0, 0x0, 0x0, 0x94, 0xf3, 0xff}}]}}]}}, 0x0)

program did not crash
validation run: crashed=false
reproducing took 1h28m40.331885496s
repro crashed as (corrupted=false):
usb 4-1: Falling back to sysfs fallback for: ueagle-atm/adi930.fw
------------[ cut here ]------------
WARNING: fs/kernfs/dir.c:537 at kernfs_get.part.0+0x6e/0x80 fs/kernfs/dir.c:537, CPU#0: kworker/0:24/6383
Modules linked in:
CPU: 0 UID: 0 PID: 6383 Comm: kworker/0:24 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get.part.0+0x6e/0x80 fs/kernfs/dir.c:537
Code: 48 8c 55 ff 85 ed 74 1c e8 9f 91 55 ff be 04 00 00 00 48 89 df e8 c2 7e be ff f0 ff 03 5b 5d e9 63 fc a6 fe e8 83 91 55 ff 90 <0f> 0b 90 eb d9 48 89 df e8 a5 76 be ff eb c0 0f 1f 00 90 90 90 90
RSP: 0018:ffffc90004d1f760 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888059290d20 RCX: ffffffff82694488
RDX: ffff888031060000 RSI: ffffffff826944ad RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888031060b30 R12: ffff888072f8a900
R13: ffff88805da84038 R14: 0000000000000000 R15: ffff88805da84030
FS:  0000000000000000(0000) GS:ffff8881248f6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7271572100 CR3: 0000000075ecd000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kernfs_get+0x1f/0x30 fs/kernfs/dir.c:536
 sysfs_get include/linux/sysfs.h:802 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x353/0x9d0 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x16e/0x240 lib/kobject.c:426
 device_add+0x288/0x1980 drivers/base/core.c:3627
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline]
 firmware_fallback_sysfs+0x2ec/0xc40 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0x101c/0x14e0 drivers/base/firmware_loader/main.c:898
 request_firmware_work_func+0xea/0x250 drivers/base/firmware_loader/main.c:1150
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 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):
usb 4-1: Falling back to sysfs fallback for: ueagle-atm/adi930.fw
------------[ cut here ]------------
WARNING: fs/kernfs/dir.c:537 at kernfs_get.part.0+0x6e/0x80 fs/kernfs/dir.c:537, CPU#0: kworker/0:24/6383
Modules linked in:
CPU: 0 UID: 0 PID: 6383 Comm: kworker/0:24 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get.part.0+0x6e/0x80 fs/kernfs/dir.c:537
Code: 48 8c 55 ff 85 ed 74 1c e8 9f 91 55 ff be 04 00 00 00 48 89 df e8 c2 7e be ff f0 ff 03 5b 5d e9 63 fc a6 fe e8 83 91 55 ff 90 <0f> 0b 90 eb d9 48 89 df e8 a5 76 be ff eb c0 0f 1f 00 90 90 90 90
RSP: 0018:ffffc90004d1f760 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888059290d20 RCX: ffffffff82694488
RDX: ffff888031060000 RSI: ffffffff826944ad RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888031060b30 R12: ffff888072f8a900
R13: ffff88805da84038 R14: 0000000000000000 R15: ffff88805da84030
FS:  0000000000000000(0000) GS:ffff8881248f6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7271572100 CR3: 0000000075ecd000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kernfs_get+0x1f/0x30 fs/kernfs/dir.c:536
 sysfs_get include/linux/sysfs.h:802 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x353/0x9d0 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x16e/0x240 lib/kobject.c:426
 device_add+0x288/0x1980 drivers/base/core.c:3627
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline]
 firmware_fallback_sysfs+0x2ec/0xc40 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0x101c/0x14e0 drivers/base/firmware_loader/main.c:898
 request_firmware_work_func+0xea/0x250 drivers/base/firmware_loader/main.c:1150
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>