rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=74861, q=281) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294994058-4294983555), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.5 R running task 28344 4537 10295 0x00000008 Call Trace: sched_show_task kernel/sched/core.c:5814 [inline] sched_show_task.cold+0x2ed/0x34e kernel/sched/core.c:5789 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline] check_cpu_stall kernel/rcu/tree_stall.h:536 [inline] rcu_pending kernel/rcu/tree.c:2736 [inline] rcu_sched_clock_irq.cold+0xac8/0xc13 kernel/rcu/tree.c:2183 update_process_times+0x32/0x80 kernel/time/timer.c:1724 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1299 __run_hrtimer kernel/time/hrtimer.c:1493 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1555 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1617 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:__kasan_check_read+0x0/0x20 mm/kasan/common.c:91 Code: e8 09 bd ae ff 0f 0b 4c 8b 4d d0 e9 27 ee ff ff 48 8b 73 58 89 c2 48 c7 c7 a0 ce 89 88 f7 da e8 ea bc ae ff e9 da ee ff ff 90 <55> 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 cf 26 00 00 5d c3 0f 1f 00 RSP: 0018:ffff8880ae809208 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88809c948f48 RCX: ffffffff8158f467 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88809c948f48 RBP: ffff8880ae8092d0 R08: 1ffff110139291e9 R09: ffffed10139291ea R10: ffffed10139291e9 R11: ffff88809c948f4b R12: 0000000000000001 R13: 0000000000000003 R14: ffffed10139291e9 R15: 0000000000000001 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:642 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline] queued_spin_lock include/asm-generic/qspinlock.h:81 [inline] do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x3b/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] release_sock+0x20/0x1c0 net/core/sock.c:2932 wait_on_pending_writer+0x20f/0x420 net/tls/tls_main.c:91 tls_sk_proto_cleanup+0x2c5/0x3e0 net/tls/tls_main.c:295 tls_sk_proto_unhash+0x90/0x3f0 net/tls/tls_main.c:330 tcp_set_state+0x5b9/0x7d0 net/ipv4/tcp.c:2235 tcp_done+0xe2/0x320 net/ipv4/tcp.c:3824 tcp_reset+0x132/0x500 net/ipv4/tcp_input.c:4123 tcp_validate_incoming+0xa2d/0x1660 net/ipv4/tcp_input.c:5483 tcp_rcv_established+0x6b5/0x1e70 net/ipv4/tcp_input.c:5691 tcp_v6_do_rcv+0x41e/0x12c0 net/ipv6/tcp_ipv6.c:1371 tcp_v6_rcv+0x31f1/0x3500 net/ipv6/tcp_ipv6.c:1603 ip6_protocol_deliver_rcu+0x2fe/0x1660 net/ipv6/ip6_input.c:397 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447 dst_input include/net/dst.h:442 [inline] ip6_rcv_finish+0x1de/0x2f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4999 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5113 process_backlog+0x206/0x750 net/core/dev.c:5924 napi_poll net/core/dev.c:6347 [inline] net_rx_action+0x508/0x10c0 net/core/dev.c:6413 __do_softirq+0x262/0x98c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1080 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] inet_csk_listen_stop+0x1e0/0x850 net/ipv4/inet_connection_sock.c:993 tcp_close+0xd5b/0x10e0 net/ipv4/tcp.c:2338 inet_release+0xed/0x200 net/ipv4/af_inet.c:427 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:470 __sock_release+0xce/0x280 net/socket.c:590 sock_close+0x1e/0x30 net/socket.c:1268 __fput+0x2ff/0x890 fs/file_table.c:280 ____fput+0x16/0x20 fs/file_table.c:313 task_work_run+0x145/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413511 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fff4fcea600 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000413511 RDX: 0000000000000000 RSI: ffffffff873d4860 RDI: 0000000000000005 RBP: 0000000000000001 R08: ffffffff8128fdec R09: 0000000054a70870 R10: 00007fff4fcea6e0 R11: 0000000000000293 R12: 000000000075c9a0 R13: 000000000075c9a0 R14: 0000000000761158 R15: ffffffffffffffff rcu: rcu_preempt kthread starved for 10573 jiffies! g74861 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29392 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x15b0 kernel/sched/core.c:3921 schedule+0xa8/0x270 kernel/sched/core.c:3985 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1893 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline] rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352