Hello, syzbot found the following issue on: HEAD commit: 486291a0e624 Merge tag 'drm-fixes-2024-03-30' of https://g.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ab1129180000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2599baf258ef795 dashboard link: https://syzkaller.appspot.com/bug?extid=7fb05ccf7b3d2f9617b3 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1299932d180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1101e52d180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ea2c2e416c4f/disk-486291a0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/83fdaf5e5783/vmlinux-486291a0.xz kernel image: https://storage.googleapis.com/syzbot-assets/1f674430b191/bzImage-486291a0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7fb05ccf7b3d2f9617b3@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in line6_pod_process_message+0x72f/0x7b0 sound/usb/line6/pod.c:201 line6_pod_process_message+0x72f/0x7b0 sound/usb/line6/pod.c:201 line6_data_received+0x5db/0x7e0 sound/usb/line6/driver.c:317 __usb_hcd_giveback_urb+0x508/0x770 drivers/usb/core/hcd.c:1648 usb_hcd_giveback_urb+0x157/0x720 drivers/usb/core/hcd.c:1732 dummy_timer+0xd93/0x6b10 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x49/0x580 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [inline] __run_timer_base+0x84e/0xe90 kernel/time/timer.c:2429 run_timer_base kernel/time/timer.c:2438 [inline] run_timer_softirq+0x3a/0x70 kernel/time/timer.c:2448 __do_softirq+0x1c0/0x7d7 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0x6a/0x130 kernel/softirq.c:645 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 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x25/0x30 drivers/acpi/processor_idle.c:112 acpi_idle_do_entry+0x22/0x40 drivers/acpi/processor_idle.c:573 acpi_idle_enter+0xa1/0xc0 drivers/acpi/processor_idle.c:707 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:236 [inline] do_idle+0x551/0x750 kernel/sched/idle.c:332 cpu_startup_entry+0x65/0x80 kernel/sched/idle.c:430 rest_init+0x1e8/0x260 init/main.c:732 start_kernel+0x927/0xa70 init/main.c:1074 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x98/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x12c/0x137 Uninit was created at: slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmalloc_trace+0x578/0xba0 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] line6_init_cap_control+0x4f1/0x770 sound/usb/line6/driver.c:700 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+0x1475/0x1c90 drivers/base/core.c:3705 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+0x1475/0x1c90 drivers/base/core.c:3705 usb_new_device+0x15ff/0x2470 drivers/usb/core/hub.c:2643 hub_port_connect drivers/usb/core/hub.c:5512 [inline] hub_port_connect_change drivers/usb/core/hub.c:5652 [inline] port_event drivers/usb/core/hub.c:5812 [inline] hub_event+0x4ff8/0x72d0 drivers/usb/core/hub.c:5894 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3335 worker_thread+0xea5/0x1560 kernel/workqueue.c:3416 kthread+0x3e2/0x540 kernel/kthread.c:388 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.9.0-rc1-syzkaller-00274-g486291a0e624 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
