rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P18940 (detected by 0, t=10502 jiffies, g=53933, q=756) syz-executor.5 R running task 26800 18940 17765 0x00004006 Call Trace: sched_show_task kernel/sched/core.c:5753 [inline] sched_show_task.cold+0x2ed/0x34e kernel/sched/core.c:5728 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:190 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:398 [inline] check_cpu_stall kernel/rcu/tree_stall.h:536 [inline] rcu_pending kernel/rcu/tree.c:2736 [inline] rcu_sched_clock_irq.cold+0xb9b/0xc1a kernel/rcu/tree.c:2183 update_process_times+0x32/0x80 kernel/time/timer.c:1639 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1068 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1093 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:__local_bh_disable_ip+0xd3/0x1b0 kernel/softirq.c:130 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 bd 00 00 00 48 83 3d 48 55 8d 07 00 0f 84 9c 00 00 00 4c 89 ef 57 9d <0f> 1f 44 00 00 65 8b 05 a9 6d bc 7e 25 ff ff ff 7f 39 d8 74 11 5b RSP: 0018:ffff88806e20fc48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000201 RCX: 0000000000000001 RDX: 1ffffffff11a5ca2 RSI: 0000000000000201 RDI: 0000000000000286 RBP: ffff88806e20fc60 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85a14ed3 R13: 0000000000000286 R14: 0000000000a222b7 R15: 0000000000000000 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock_bh+0x17/0x50 kernel/locking/spinlock.c:175 sock_hash_free+0x133/0x4a0 net/core/sock_map.c:850 map_create kernel/bpf/syscall.c:635 [inline] __do_sys_bpf+0x25f1/0x42f0 kernel/bpf/syscall.c:2831 __se_sys_bpf kernel/bpf/syscall.c:2808 [inline] __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2808 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe1820c8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 000000000000003c RSI: 0000000020000280 RDI: 0000000000000000 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe1820c96d4 R13: 00000000004bfbda R14: 00000000004d1600 R15: 00000000ffffffff