rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3278 (detected by 0, t=10503 jiffies, g=211085, q=918) syz-executor.1 R running task 27728 3278 7200 0x00004006 Call Trace: sched_show_task kernel/sched/core.c:5955 [inline] sched_show_task.cold+0x2e2/0x343 kernel/sched/core.c:5930 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:190 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:418 [inline] check_cpu_stall kernel/rcu/tree_stall.h:558 [inline] rcu_pending kernel/rcu/tree.c:3225 [inline] rcu_sched_clock_irq.cold+0xca8/0xcfa kernel/rcu/tree.c:2296 update_process_times+0x25/0x60 kernel/time/timer.c:1726 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1320 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x5ca/0xed0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__sctp_v6_cmp_addr+0x2a/0x540 net/sctp/ipv6.c:573 Code: 41 55 41 54 55 48 89 f5 53 48 89 fb 48 83 ec 08 e8 5b 23 24 fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 46 04 00 00 48 RSP: 0018:ffffc90001927768 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88803f695d20 RCX: ffffc90004cc9000 RDX: 0000000000000000 RSI: ffffffff874f1985 RDI: ffff88803f695d20 RBP: ffffc90001927850 R08: ffff888091788240 R09: ffffed100940fbc8 R10: ffff88804a07de3b R11: ffffed100940fbc7 R12: ffffc90001927850 R13: ffff8880345aa098 R14: ffffffff8a745920 R15: 0000000000000001 sctp_v6_cmp_addr+0x1a/0xd0 net/sctp/ipv6.c:609 sctp_bind_addr_state+0x103/0x1d0 net/sctp/bind_addr.c:404 sctp_copy_local_addr_list+0x255/0x530 net/sctp/protocol.c:161 sctp_copy_one_addr+0x5b/0x170 net/sctp/bind_addr.c:457 sctp_bind_addr_copy+0xfc/0x2ca net/sctp/bind_addr.c:56 sctp_connect_new_asoc+0x16c/0x580 net/sctp/socket.c:1088 __sctp_connect+0x430/0xc70 net/sctp/socket.c:1190 __sctp_setsockopt_connectx+0x12d/0x180 net/sctp/socket.c:1336 sctp_getsockopt_connectx3 net/sctp/socket.c:1421 [inline] sctp_getsockopt net/sctp/socket.c:8092 [inline] sctp_getsockopt+0x177f/0x6f5d net/sctp/socket.c:8023 __sys_getsockopt+0x14b/0x2e0 net/socket.c:2172 __do_sys_getsockopt net/socket.c:2187 [inline] __se_sys_getsockopt net/socket.c:2184 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2184 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 0d 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6eb8661c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00000000004df780 RCX: 000000000045ca29 RDX: 000000000000006f RSI: 0000000000000084 RDI: 0000000000000007 RBP: 000000000078bf00 R08: 0000000020000180 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000001a5 R14: 00000000004d2988 R15: 00007f6eb86626d4