===================================================== BUG: KMSAN: uninit-value in line6_midibuf_read+0x40b/0x1050 sound/usb/line6/midibuf.c:155 line6_midibuf_read+0x40b/0x1050 sound/usb/line6/midibuf.c:155 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+0x3ab/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+0x7e/0x90 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 filter_irq_stacks+0x175/0x1a0 stack_depot_save_flags+0x2c/0x6e0 lib/stackdepot.c:609 stack_depot_save+0x12/0x20 lib/stackdepot.c:678 __msan_poison_alloca+0x106/0x1b0 mm/kmsan/instrumentation.c:286 printk_get_next_message+0x8a/0x1950 kernel/printk/printk.c:2880 console_emit_next_record kernel/printk/printk.c:2950 [inline] console_flush_all+0x450/0x14b0 kernel/printk/printk.c:3049 console_unlock+0xaa/0x4f0 kernel/printk/printk.c:3118 vprintk_emit+0x685/0xc60 kernel/printk/printk.c:2348 dev_vprintk_emit+0x470/0x580 drivers/base/core.c:4912 dev_printk_emit+0x15d/0x190 drivers/base/core.c:4923 __dev_printk+0x2b2/0x320 drivers/base/core.c:4935 _dev_info+0x18a/0x1a0 drivers/base/core.c:4981 line6_probe+0xfda/0x1120 sound/usb/line6/driver.c:814 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 Uninit was created at: slab_post_alloc_hook mm/slub.c:3994 [inline] slab_alloc_node mm/slub.c:4037 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4170 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: 5250 Comm: kworker/0:4 Not tainted 6.11.0-rc6-syzkaller-00017-gc9f016e72b5c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: usb_hub_wq hub_event =====================================================