INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 1, t=10502 jiffies, g=4626, c=4625, q=436) All QSes seen, last rcu_preempt kthread activity 9880 (4294977600-4294967720), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.3 R running task 27568 11247 6347 0x8000000e Call Trace: sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline] check_cpu_stall kernel/rcu/tree.c:1616 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arp_solicit+0x2/0x1080 net/ipv4/arp.c:335 RSP: 0018:ffff8880aeb07cf8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a44a6300 RBX: ffff88808d11b6c0 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffff8880a4b70180 RDI: ffff88808d11b6c0 RBP: ffff8880a4b70180 R08: 0000000000000001 R09: 0000000000000002 R10: ffffed101496e048 R11: ffff8880a4b70247 R12: ffffffff85561b80 R13: 0000000000000001 R14: ffff88808d11b7dd R15: ffff88808d11b6e8 neigh_probe+0xc2/0x100 net/core/neighbour.c:913 neigh_timer_handler+0x259/0xa50 net/core/neighbour.c:994 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:150 [inline] RIP: 0010:qlist_free_all+0xfc/0x140 mm/kasan/quarantine.c:166 RSP: 0018:ffff88805cb8fa00 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: ffff8880669e6c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880a44a6b88 RDI: 0000000000000286 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880866d6500 R13: ffff88805cb8fa38 R14: ffff8880aa587e40 R15: 0000000000000286 quarantine_reduce+0x140/0x170 mm/kasan/quarantine.c:259 kasan_kmalloc+0x95/0xe0 mm/kasan/kasan.c:536 kmem_cache_alloc+0x127/0x770 mm/slab.c:3552 __d_alloc+0x2a/0x9b0 fs/dcache.c:1623 anon_inode_getfile+0x101/0x2f0 fs/anon_inodes.c:92 anon_inode_getfd+0x42/0x90 fs/anon_inodes.c:150 bpf_prog_new_fd kernel/bpf/syscall.c:895 [inline] bpf_prog_load+0x728/0xe00 kernel/bpf/syscall.c:1087 SYSC_bpf kernel/bpf/syscall.c:1512 [inline] SyS_bpf+0xf89/0x2cd3 kernel/bpf/syscall.c:1477 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c829 RSP: 002b:00007fe57f8efc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00000000004da5c0 RCX: 000000000045c829 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000006a R14: 00000000004c30b4 R15: 00007fe57f8f06d4