rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4842 (detected by 0, t=10503 jiffies, g=476013, q=1564) syz-executor.5 R running task 28304 4842 9343 0x00004006 Call Trace: sched_show_task kernel/sched/core.c:5954 [inline] sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5929 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:538 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq.cold+0xbc0/0xc02 kernel/rcu/tree.c:2271 update_process_times+0x2d/0x70 kernel/time/timer.c:1726 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__sanitizer_cov_trace_pc+0x4b/0x50 kernel/kcov.c:197 Code: 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 <5d> c3 0f 1f 00 65 4c 8b 04 25 c0 1e 02 00 65 8b 05 38 f1 8c 7e a9 RSP: 0018:ffffc90001bc7960 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: ffff8880a95c7ba0 RCX: ffffc90013f17000 RDX: 0000000000040000 RSI: ffffffff873dbcba RDI: ffff8880a95c7ba0 RBP: ffffc90001bc7960 R08: ffff88804f40a000 R09: ffffed1014fd87d8 R10: ffffed1014fd87d7 R11: ffff8880a7ec3ebb R12: ffffc90001bc7a70 R13: ffffc90001bc7a70 R14: ffff88803ae10090 R15: 0000000000000001 __sctp_v6_cmp_addr+0x1a/0x560 net/sctp/ipv6.c:565 sctp_v6_cmp_addr+0x1f/0xe0 net/sctp/ipv6.c:601 sctp_bind_addr_state+0x10a/0x1d0 net/sctp/bind_addr.c:404 sctp_copy_local_addr_list+0x255/0x530 net/sctp/protocol.c:161 sctp_copy_one_addr+0x5f/0x170 net/sctp/bind_addr.c:457 sctp_bind_addr_copy+0xfc/0x2c8 net/sctp/bind_addr.c:56 sctp_assoc_set_bind_addr_from_ep+0x168/0x1c0 net/sctp/associola.c:1579 sctp_connect_new_asoc+0x178/0x5a0 net/sctp/socket.c:1074 __sctp_connect+0x433/0xcd0 net/sctp/socket.c:1176 sctp_connect net/sctp/socket.c:4895 [inline] sctp_inet_connect+0x14d/0x1c0 net/sctp/socket.c:4910 __sys_connect_file+0x161/0x1c0 net/socket.c:1844 __sys_connect+0x174/0x1b0 net/socket.c:1861 __do_sys_connect net/socket.c:1872 [inline] __se_sys_connect net/socket.c:1869 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1869 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a919 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd69f9acc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919 RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd69f9ad6d4 R13: 00000000004c10ab R14: 00000000004d4e78 R15: 00000000ffffffff protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 net_ratelimit: 12 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1