INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=2153, c=2152, q=1154) All QSes seen, last rcu_preempt kthread activity 10490 (4294957849-4294947359), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.3 R running task 27808 8258 7319 0x8000000c Call Trace: sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2f0/0x351 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+0xcb1/0xd0a kernel/rcu/tree.c:2792 update_process_times+0x31/0x70 kernel/time/timer.c:1590 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:165 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__kernel_text_address+0x0/0x40 kernel/extable.c:104 RSP: 0018:ffff8880aec07890 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffff8880aec078b8 RCX: ffff8880aec08000 RDX: 1ffff11015d80f20 RSI: ffff8880aec07940 RDI: ffffffff8122e8f6 RBP: ffff8880aec078a8 R08: 0000000000000001 R09: ffff8880aec07910 R10: ffff8880aec078e0 R11: ffff8880aec078f0 R12: ffff8880aec07900 R13: 0000000000000000 R14: ffff888092ad65c0 R15: ffff8880aa800940 __save_stack_trace+0x7b/0xd0 arch/x86/kernel/stacktrace.c:45 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x51/0x80 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] nlmsg_new include/net/netlink.h:511 [inline] __neigh_notify+0x8b/0x150 net/core/neighbour.c:2926 neigh_update_notify net/core/neighbour.c:2304 [inline] neigh_timer_handler+0x297/0xa70 net/core/neighbour.c:1001 call_timer_fn+0x161/0x670 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+0x5b7/0x1520 kernel/time/timer.c:1649 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:lock_release+0x59/0x940 kernel/locking/lockdep.c:4003 RSP: 0018:ffff88806c5ff668 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: 1ffff1100d8bfed3 RCX: 1ffffffff0f817ac RDX: ffffed100d8bfed3 RSI: 0000000000000001 RDI: ffff888092ad6e3c RBP: ffff88806c5ff700 R08: 0000000000000000 R09: ffff888092ad6e88 R10: ffff888092ad6e68 R11: ffff888092ad65c0 R12: ffffffff87f84ee0 R13: ffffffff818ca913 R14: ffff888092ad65c0 R15: ffff88806c5ff6d8 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:685 [inline] __unlock_page_memcg+0x70/0x100 mm/memcontrol.c:1716 unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:1725 page_remove_file_rmap mm/rmap.c:1245 [inline] page_remove_rmap+0x1c7/0x940 mm/rmap.c:1296 zap_pte_range mm/memory.c:1342 [inline] zap_pmd_range mm/memory.c:1444 [inline] zap_pud_range mm/memory.c:1473 [inline] zap_p4d_range mm/memory.c:1494 [inline] unmap_page_range+0xabd/0x19f0 mm/memory.c:1515 unmap_single_vma+0x15d/0x2c0 mm/memory.c:1560 unmap_vmas+0xac/0x170 mm/memory.c:1590 exit_mmap+0x285/0x4e0 mm/mmap.c:3056 __mmput kernel/fork.c:930 [inline] mmput+0x114/0x440 kernel/fork.c:951 exit_mm kernel/exit.c:545 [inline] do_exit+0x952/0x2cd0 kernel/exit.c:845 do_group_exit+0x111/0x330 kernel/exit.c:955 get_signal+0x381/0x1cd0 kernel/signal.c:2418 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c6c9 RSP: 002b:00007f6b58e64c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: fffffffffffffff7 RBX: 00007f6b58e656d4 RCX: 000000000045c6c9 RDX: 0000000000000000 RSI: 0000000000008941 RDI: ffffffffffffffff RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000690 R14: 00000000004c9493 R15: 000000000076bf2c