===================================================== 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+0x4be/0x7e0 sound/usb/line6/driver.c:306 __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+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_add arch/x86/include/asm/preempt.h:79 [inline] kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:93 [inline] virt_to_page_or_null+0x54/0x150 mm/kmsan/shadow.c:75 kmsan_get_metadata+0x146/0x1d0 mm/kmsan/shadow.c:143 kmsan_get_shadow_origin_ptr+0x4d/0xb0 mm/kmsan/shadow.c:102 get_shadow_origin_ptr mm/kmsan/instrumentation.c:36 [inline] __msan_metadata_ptr_for_load_8+0x24/0x40 mm/kmsan/instrumentation.c:92 skb_header_pointer include/linux/skbuff.h:4100 [inline] tcp_sack net/netfilter/nf_conntrack_proto_tcp.c:402 [inline] tcp_in_window net/netfilter/nf_conntrack_proto_tcp.c:533 [inline] nf_conntrack_tcp_packet+0x19e7/0x8140 net/netfilter/nf_conntrack_proto_tcp.c:1253 nf_conntrack_handle_packet net/netfilter/nf_conntrack_core.c:1921 [inline] nf_conntrack_in+0xe90/0x30d0 net/netfilter/nf_conntrack_core.c:2011 ipv4_conntrack_in+0x35/0x40 net/netfilter/nf_conntrack_proto.c:207 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626 nf_hook_slow_list+0x24d/0x860 net/netfilter/core.c:665 NF_HOOK_LIST include/linux/netfilter.h:350 [inline] ip_sublist_rcv+0x17b7/0x17f0 net/ipv4/ip_input.c:637 ip_list_rcv+0x9ef/0xa40 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5703 [inline] __netif_receive_skb_list_core+0x15c5/0x1670 net/core/dev.c:5751 __netif_receive_skb_list net/core/dev.c:5803 [inline] netif_receive_skb_list_internal+0x1085/0x1700 net/core/dev.c:5895 gro_normal_list include/net/gro.h:515 [inline] napi_complete_done+0x425/0x880 net/core/dev.c:6246 virtqueue_napi_complete drivers/net/virtio_net.c:694 [inline] virtnet_poll+0x5b9d/0x6a20 drivers/net/virtio_net.c:2826 __napi_poll+0xe7/0x980 net/core/dev.c:6771 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0xa5a/0x19b0 net/core/dev.c:6962 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 common_interrupt+0x94/0xa0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x2b/0x40 arch/x86/include/asm/idtentry.h:693 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline] acpi_safe_halt+0x25/0x30 drivers/acpi/processor_idle.c:111 acpi_idle_do_entry+0x22/0x40 drivers/acpi/processor_idle.c:568 acpi_idle_enter+0xa1/0xc0 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0xcb/0x250 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x7f/0xf0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x551/0x750 kernel/sched/idle.c:326 cpu_startup_entry+0x65/0x80 kernel/sched/idle.c:424 start_secondary+0xcb/0xd0 arch/x86/kernel/smpboot.c:313 common_startup_64+0x12c/0x137 Uninit was created at: slab_post_alloc_hook mm/slub.c:3985 [inline] slab_alloc_node mm/slub.c:4028 [inline] __do_kmalloc_node mm/slub.c:4148 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4161 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:704 line6_probe+0xeae/0x1120 sound/usb/line6/driver.c:797 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:656 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:798 driver_probe_device+0x72/0x890 drivers/base/dd.c:828 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:956 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457 __device_attach+0x3c1/0x650 drivers/base/dd.c:1028 device_initial_probe+0x32/0x40 drivers/base/dd.c:1077 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532 device_add+0x13aa/0x1ba0 drivers/base/core.c:3679 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:656 __driver_probe_device+0x2ab/0x5d0 drivers/base/dd.c:798 driver_probe_device+0x72/0x890 drivers/base/dd.c:828 __device_attach_driver+0x568/0x9e0 drivers/base/dd.c:956 bus_for_each_drv+0x403/0x620 drivers/base/bus.c:457 __device_attach+0x3c1/0x650 drivers/base/dd.c:1028 device_initial_probe+0x32/0x40 drivers/base/dd.c:1077 bus_probe_device+0x3dc/0x5c0 drivers/base/bus.c:532 device_add+0x13aa/0x1ba0 drivers/base/core.c:3679 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+0x4ff8/0x72d0 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+0xea5/0x1520 kernel/workqueue.c:3390 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: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 =====================================================