====================================
WARNING: syz.4.168/6274 still has locks held!
syzkaller #0 Tainted: G S                 
------------------------------------
5 locks held by syz.4.168/6274:
 #0: ffff8880289c1728 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1259
 #1: ffff88806143c500 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2733 [inline]
 #1: ffff88806143c500 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x231/0xbb0 fs/read_write.c:683
 #2: ffff888034dcd478 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d9/0x540 fs/kernfs/file.c:336
 #3: ffff888060ea8210 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #3: ffff888060ea8210 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1170 [inline]
 #3: ffff888060ea8210 (&dev->mutex){....}-{4:4}, at: device_driver_attach+0xac/0x1d0 drivers/base/dd.c:1202
 #4: ffff88802a22e1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
 #4: ffff88802a22e1d8 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
 #4: ffff88802a22e1d8 (&dev->mutex){....}-{4:4}, at: device_driver_attach+0xd5/0x1d0 drivers/base/dd.c:1202

stack backtrace:
CPU: 1 UID: 0 PID: 6274 Comm: syz.4.168 Tainted: G S                  syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [S]=CPU_OUT_OF_SPEC
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_held_locks_bug+0x82/0x90 kernel/locking/lockdep.c:6752
 try_to_freeze include/linux/freezer.h:62 [inline]
 usermodehelper_read_trylock+0x207/0x2c0 kernel/umh.c:230
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:147 [inline]
 firmware_fallback_sysfs+0x16e/0xa40 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0x1049/0x1780 drivers/base/firmware_loader/main.c:898
 request_firmware+0x36/0x50 drivers/base/firmware_loader/main.c:948
 dvb_usb_download_firmware+0xb5/0x270 drivers/media/usb/dvb-usb/dvb-usb-firmware.c:93
 dvb_usb_device_init+0xddf/0x2570 drivers/media/usb/dvb-usb/dvb-usb-init.c:298
 usb_probe_interface+0x653/0xc60 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203
 bind_store+0x1d3/0x220 drivers/base/bus.c:267
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3136a3e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3134c54028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3136cc6180 RCX: 00007f3136a3e0d9
RDX: 0000000000000007 RSI: 0000200000000500 RDI: 0000000000000004
RBP: 00007f3136ad5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3136cc6218 R14: 00007f3136cc6180 R15: 00007ffd9c7f4d98
 </TASK>