Extracting prog: 7m6.987855063s
Minimizing prog: 6m7.581675439s
Simplifying prog options: 12m14.808429024s
Extracting C: 5m13.212934135s
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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000040)={{0x12, 0x1, 0x200, 0xa, 0x86, 0xf3, 0x40, 0x1110, 0x9024, 0xdb24, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0xe9, 0x50, 0x9, [{{0x9, 0x4, 0x62, 0x4, 0x0, 0x6f, 0x6f, 0x49, 0x5}}]}}]}}, 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000040)={{0x12, 0x1, 0x200, 0xa, 0x86, 0xf3, 0x40, 0x1110, 0x9024, 0xdb24, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0xe9, 0x50, 0x9, [{{0x9, 0x4, 0x62, 0x4, 0x0, 0x6f, 0x6f, 0x49, 0x5}}]}}]}}, 0x0)

program crashed: WARNING in kernfs_get
single: successfully extracted reproducer
found reproducer with 1 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 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=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 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=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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000040)={{0x12, 0x1, 0x200, 0xa, 0x86, 0xf3, 0x40, 0x1110, 0x9024, 0xdb24, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0xe9, 0x50, 0x9, [{{0x9, 0x4, 0x62, 0x4, 0x0, 0x6f, 0x6f, 0x49, 0x5}}]}}]}}, 0x0)

program did not crash
testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000040)={{0x12, 0x1, 0x200, 0xa, 0x86, 0xf3, 0x40, 0x1110, 0x9024, 0xdb24, 0x1, 0x2, 0x3, 0x1, [{{0x9, 0x2, 0x12, 0x1, 0x0, 0xe9, 0x50, 0x9, [{{0x9, 0x4, 0x62, 0x4, 0x0, 0x6f, 0x6f, 0x49, 0x5}}]}}]}}, 0x0)

program did not crash
reproducing took 30m42.590912163s
repro crashed as (corrupted=false):
usb 3-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6245 at fs/kernfs/dir.c:537 kernfs_get+0x72/0x90 fs/kernfs/dir.c:537
Modules linked in:
CPU: 1 UID: 0 PID: 6245 Comm: kworker/1:28 Not tainted 6.16.0-rc3-syzkaller-00042-g78f4e737a53e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get+0x72/0x90 fs/kernfs/dir.c:537
Code: e8 33 e9 61 ff 48 89 df be 04 00 00 00 e8 96 6e c5 ff f0 ff 03 eb 05 e8 1c e9 61 ff 5b 5d e9 d5 9a 11 09 cc e8 0f e9 61 ff 90 <0f> 0b 90 eb d6 89 d9 80 e1 07 80 c1 03 38 c1 7c b6 48 89 df e8 95
RSP: 0018:ffffc9000473f5e0 EFLAGS: 00010293
RAX: ffffffff825ea411 RBX: ffff888031d3d690 RCX: ffff88802b9d3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888031d3d693 R09: 1ffff110063a7ad2
R10: dffffc0000000000 R11: ffffed10063a7ad3 R12: ffff888032209328
R13: 1ffff11006441266 R14: ffff888032209330 R15: 1ffff11006441265
FS:  0000000000000000(0000) GS:ffff888125b1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555893f4808 CR3: 000000000e138000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sysfs_get include/linux/sysfs.h:799 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x632/0xb40 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x155/0x220 lib/kobject.c:426
 class_dir_create_and_add drivers/base/core.c:3235 [inline]
 get_device_parent+0x316/0x3a0 drivers/base/core.c:3286
 device_add+0x2e1/0xb50 drivers/base/core.c:3616
 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+0x2e4/0x9b0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xf83/0x15b0 drivers/base/firmware_loader/main.c:915
 request_firmware_work_func+0xaf/0x1c0 drivers/base/firmware_loader/main.c:1168
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

final repro crashed as (corrupted=false):
usb 3-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6245 at fs/kernfs/dir.c:537 kernfs_get+0x72/0x90 fs/kernfs/dir.c:537
Modules linked in:
CPU: 1 UID: 0 PID: 6245 Comm: kworker/1:28 Not tainted 6.16.0-rc3-syzkaller-00042-g78f4e737a53e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get+0x72/0x90 fs/kernfs/dir.c:537
Code: e8 33 e9 61 ff 48 89 df be 04 00 00 00 e8 96 6e c5 ff f0 ff 03 eb 05 e8 1c e9 61 ff 5b 5d e9 d5 9a 11 09 cc e8 0f e9 61 ff 90 <0f> 0b 90 eb d6 89 d9 80 e1 07 80 c1 03 38 c1 7c b6 48 89 df e8 95
RSP: 0018:ffffc9000473f5e0 EFLAGS: 00010293
RAX: ffffffff825ea411 RBX: ffff888031d3d690 RCX: ffff88802b9d3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888031d3d693 R09: 1ffff110063a7ad2
R10: dffffc0000000000 R11: ffffed10063a7ad3 R12: ffff888032209328
R13: 1ffff11006441266 R14: ffff888032209330 R15: 1ffff11006441265
FS:  0000000000000000(0000) GS:ffff888125b1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555893f4808 CR3: 000000000e138000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sysfs_get include/linux/sysfs.h:799 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x632/0xb40 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x155/0x220 lib/kobject.c:426
 class_dir_create_and_add drivers/base/core.c:3235 [inline]
 get_device_parent+0x316/0x3a0 drivers/base/core.c:3286
 device_add+0x2e1/0xb50 drivers/base/core.c:3616
 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+0x2e4/0x9b0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xf83/0x15b0 drivers/base/firmware_loader/main.c:915
 request_firmware_work_func+0xaf/0x1c0 drivers/base/firmware_loader/main.c:1168
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>