INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=120002 jiffies, g=49386, c=49385, q=276) All QSes seen, last rcu_sched kthread activity 120002 (4295067322-4294947320), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor7 R running task 59424 16830 4523 0x8000000a Call Trace: sched_show_task+0x610/0x740 kernel/sched/core.c:5329 print_other_cpu_stall kernel/rcu/tree.c:1481 [inline] check_cpu_stall kernel/rcu/tree.c:1599 [inline] __rcu_pending kernel/rcu/tree.c:3356 [inline] rcu_pending kernel/rcu/tree.c:3401 [inline] rcu_check_callbacks+0x277a/0x2ae0 kernel/rcu/tree.c:2763 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636 tick_sched_handle kernel/time/tick-sched.c:164 [inline] tick_sched_timer+0x3ba/0x520 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc54/0x1630 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 RIP: 0010:msan_get_shadow_origin_ptr+0xe/0x230 mm/kmsan/kmsan_instr.c:229 RSP: 0018:ffff88019d57f4f0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81535b65 RBX: 0000000000000003 RCX: ffff8801392e3a80 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88019d57f5b8 RBP: ffff88019d57f520 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff81172130 R12: ffff88019d57f5b8 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8b58b000 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:320 csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x363/0x4e0 kernel/smp.c:302 smp_call_function_many+0x662/0xdf0 kernel/smp.c:434 smp_call_function kernel/smp.c:492 [inline] on_each_cpu+0xd6/0x170 kernel/smp.c:602 flush_tlb_kernel_range+0x165/0x1e0 arch/x86/mm/tlb.c:683 __purge_vmap_area_lazy+0x1f7/0x3b0 mm/vmalloc.c:696 try_purge_vmap_area_lazy mm/vmalloc.c:717 [inline] free_vmap_area_noflush+0x1fa/0x230 mm/vmalloc.c:749 free_unmap_vmap_area mm/vmalloc.c:759 [inline] remove_vm_area+0x3b9/0x460 mm/vmalloc.c:1504 __vunmap+0xb0/0x3e0 mm/vmalloc.c:1522 vfree+0x79/0x170 mm/vmalloc.c:1606 snd_pcm_lib_free_vmalloc_buffer+0xba/0x170 sound/core/pcm_memory.c:433 loopback_hw_free+0x1d9/0x270 sound/drivers/aloop.c:604 snd_pcm_release_substream+0x673/0x990 sound/core/pcm_native.c:2356 snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2382 [inline] snd_pcm_oss_release+0x30b/0x4c0 sound/core/oss/pcm_oss.c:2562 __fput+0x458/0xa30 fs/file_table.c:209 ____fput+0x37/0x40 fs/file_table.c:243 task_work_run+0x22e/0x2b0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x110e/0x3930 kernel/exit.c:867 do_group_exit+0x1a0/0x360 kernel/exit.c:970 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455a09 RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000166 RCX: 0000000000455a09 RDX: 000000000000056b RSI: 0000000000730508 RDI: 0000000000000000 RBP: 0000000000000013 R08: 0000000000000038 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 rcu_sched kthread starved for 120002 jiffies! g49386 c49385 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 RCU grace-period kthread stack dump: rcu_sched R running task 61944 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2863 [inline] __schedule+0x66e/0x730 kernel/sched/core.c:3507 schedule+0x1cc/0x2f0 kernel/sched/core.c:3551 schedule_timeout+0x3ef/0x580 kernel/time/timer.c:1801 rcu_gp_kthread+0x21e1/0x38d0 kernel/rcu/tree.c:2231 kthread+0x4db/0x6c0 kernel/kthread.c:241 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:412