=====================================================
BUG: KMSAN: uninit-value in line6_midibuf_read+0x76b/0x1050 sound/usb/line6/midibuf.c:185
 line6_midibuf_read+0x76b/0x1050 sound/usb/line6/midibuf.c:185
 line6_data_received+0x503/0xa80 sound/usb/line6/driver.c:310
 __usb_hcd_giveback_urb+0x572/0x840 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x157/0x720 drivers/usb/core/hcd.c:1734
 dummy_timer+0xd3f/0x6aa0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x564/0xe40 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x936/0x1490 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0xa6/0x3a0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x40/0x90 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
 __preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline]
 kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:95 [inline]
 virt_to_page_or_null+0xfb/0x150 mm/kmsan/shadow.c:75
 kmsan_get_metadata+0x13e/0x1c0 mm/kmsan/shadow.c:141
 kmsan_internal_set_shadow_origin+0x69/0x100 mm/kmsan/core.c:224
 kmsan_internal_unpoison_memory+0x14/0x20 mm/kmsan/core.c:63
 __msan_instrument_asm_store+0xbd/0xe0 mm/kmsan/instrumentation.c:127
 native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
 arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
 arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline]
 put_cpu_partial+0x45/0x210 mm/slub.c:3102
 __slab_free+0x5e5/0x960 mm/slub.c:4347
 do_slab_free mm/slub.c:4429 [inline]
 slab_free mm/slub.c:4478 [inline]
 kmem_cache_free+0x631/0xbb0 mm/slub.c:4552
 __d_free+0x43/0x60 fs/dcache.c:305
 rcu_do_batch kernel/rcu/tree.c:2569 [inline]
 rcu_core+0xa59/0x1e70 kernel/rcu/tree.c:2843
 rcu_core_si+0x12/0x20 kernel/rcu/tree.c:2860
 handle_softirqs+0x1ce/0x800 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0x68/0x120 kernel/softirq.c:637
 irq_exit_rcu+0x12/0x20 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x83/0x90 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
 ___slab_alloc+0xda1/0x35e0 mm/slub.c:3796
 __slab_alloc mm/slub.c:3817 [inline]
 __slab_alloc_node mm/slub.c:3870 [inline]
 slab_alloc_node mm/slub.c:4029 [inline]
 kmem_cache_alloc_lru_noprof+0x584/0xb30 mm/slub.c:4060
 xas_alloc lib/xarray.c:376 [inline]
 xas_create+0x1be9/0x2690 lib/xarray.c:678
 xas_store+0xc3/0x29e0 lib/xarray.c:788
 __xa_insert+0x190/0x6a0 lib/xarray.c:1670
 xa_insert include/linux/xarray.h:785 [inline]
 add_hash_entries+0x56b/0x690 sound/core/control.c:412
 __snd_ctl_add_replace+0x9d4/0xe60 sound/core/control.c:499
 snd_ctl_add_replace sound/core/control.c:519 [inline]
 snd_ctl_add+0x89/0x1c0 sound/core/control.c:546
 pod_init+0x1b0/0x3a0 sound/usb/line6/pod.c:386
 line6_probe+0xf1f/0x1120 sound/usb/line6/driver.c:808
 pod_probe+0x79/0x90 sound/usb/line6/pod.c:522
 usb_probe_interface+0xd6f/0x1350 drivers/usb/core/driver.c:399
 really_probe+0x4db/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:799
 driver_probe_device+0x72/0x890 drivers/base/dd.c:829
 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:957
 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457
 __device_attach+0x3c1/0x650 drivers/base/dd.c:1029
 device_initial_probe+0x32/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532
 device_add+0x13aa/0x1ba0 drivers/base/core.c:3682
 usb_set_configuration+0x31c9/0x38d0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x109/0x2a0 drivers/usb/core/generic.c:254
 usb_probe_device+0x3a7/0x690 drivers/usb/core/driver.c:294
 really_probe+0x4db/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:799
 driver_probe_device+0x72/0x890 drivers/base/dd.c:829
 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:957
 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457
 __device_attach+0x3c1/0x650 drivers/base/dd.c:1029
 device_initial_probe+0x32/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532
 device_add+0x13aa/0x1ba0 drivers/base/core.c:3682
 usb_new_device+0x15f4/0x2470 drivers/usb/core/hub.c:2651
 hub_port_connect drivers/usb/core/hub.c:5521 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x4ffb/0x72d0 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312
 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3998 [inline]
 slab_alloc_node mm/slub.c:4041 [inline]
 __do_kmalloc_node mm/slub.c:4161 [inline]
 __kmalloc_noprof+0x661/0xf30 mm/slub.c:4174
 kmalloc_noprof include/linux/slab.h:685 [inline]
 line6_midibuf_init+0x43/0x180 sound/usb/line6/midibuf.c:51
 line6_init_midi+0x3e7/0x670 sound/usb/line6/midi.c:284
 line6_init_cap_control+0x54e/0x770 sound/usb/line6/driver.c:709
 line6_probe+0xeae/0x1120 sound/usb/line6/driver.c:802
 pod_probe+0x79/0x90 sound/usb/line6/pod.c:522
 usb_probe_interface+0xd6f/0x1350 drivers/usb/core/driver.c:399
 really_probe+0x4db/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:799
 driver_probe_device+0x72/0x890 drivers/base/dd.c:829
 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:957
 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457
 __device_attach+0x3c1/0x650 drivers/base/dd.c:1029
 device_initial_probe+0x32/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532
 device_add+0x13aa/0x1ba0 drivers/base/core.c:3682
 usb_set_configuration+0x31c9/0x38d0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x109/0x2a0 drivers/usb/core/generic.c:254
 usb_probe_device+0x3a7/0x690 drivers/usb/core/driver.c:294
 really_probe+0x4db/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:799
 driver_probe_device+0x72/0x890 drivers/base/dd.c:829
 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:957
 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457
 __device_attach+0x3c1/0x650 drivers/base/dd.c:1029
 device_initial_probe+0x32/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532
 device_add+0x13aa/0x1ba0 drivers/base/core.c:3682
 usb_new_device+0x15f4/0x2470 drivers/usb/core/hub.c:2651
 hub_port_connect drivers/usb/core/hub.c:5521 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
 port_event drivers/usb/core/hub.c:5821 [inline]
 hub_event+0x4ffb/0x72d0 drivers/usb/core/hub.c:5903
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312
 worker_thread+0xea7/0x14d0 kernel/workqueue.c:3389
 kthread+0x3e2/0x540 kernel/kthread.c:389
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

CPU: 0 UID: 0 PID: 24020 Comm: kworker/0:0 Not tainted 6.11.0-rc6-syzkaller-00075-gad618736883b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: usb_hub_wq hub_event
=====================================================