rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ IRQs not enabled as expected WARNING: CPU: 0 PID: 15238 at kernel/sched/core.c:2698 try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2698 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 15238 Comm: syz-executor.5 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x45 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563 RIP: 0010:try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2698 Code: ff d4 41 89 c6 e9 18 ff ff ff 80 3d e7 c9 58 09 00 0f 85 6f fe ff ff 48 c7 c7 00 41 4b 88 c6 05 d3 c9 58 09 01 e8 b3 47 f4 ff <0f> 0b e9 55 fe ff ff 4c 89 04 24 4c 89 ee 48 89 ef 41 ff d4 4c 8b RSP: 0018:ffffc90000007bd8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 1ffff92000000f7d RCX: 0000000000000000 RDX: ffff888210316100 RSI: ffffffff815d4f87 RDI: fffff52000000f6d RBP: ffff888210316100 R08: 0000000000000001 R09: ffff8880ae620fcb R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8160c5c0 R13: ffffc90000007d00 R14: ffff888210316100 R15: ffff8880ae636c00 rcu_print_task_stall kernel/rcu/tree_stall.h:269 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:477 [inline] check_cpu_stall kernel/rcu/tree_stall.h:636 [inline] rcu_pending kernel/rcu/tree.c:3489 [inline] rcu_sched_clock_irq.cold+0x92e/0xccc kernel/rcu/tree.c:2504 update_process_times+0x25/0x60 kernel/time/timer.c:1726 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x108/0x290 kernel/time/tick-sched.c:1320 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:__sctp_v6_cmp_addr+0x1ca/0x520 net/sctp/ipv6.c:588 Code: 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 12 03 00 00 8b 5d 04 44 89 e7 89 de e8 1f 6a 13 fa 41 39 dc 0f 84 ac 02 00 00 <45> 31 e4 e8 0e 6e 13 fa 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 e8 fd RSP: 0018:ffffc900056d7860 EFLAGS: 00000206 RAX: 0000000000000002 RBX: ffff8880985898a0 RCX: ffffffff87604a2d RDX: 2e00000000000000 RSI: ffff888210316100 RDI: 0000000000000007 RBP: ffffc900056d7940 R08: 0000000000000001 R09: ffff88806474843b R10: 0000000000000000 R11: 0000000000000000 R12: 2e00000000000000 R13: ffff8880985898a8 R14: 0000000000000000 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+0x217/0x4e0 net/sctp/protocol.c:162 sctp_copy_one_addr net/sctp/bind_addr.c:457 [inline] sctp_bind_addr_copy+0xde/0x470 net/sctp/bind_addr.c:56 sctp_connect_new_asoc+0x1cd/0x770 net/sctp/socket.c:1095 __sctp_connect+0x3e2/0xc00 net/sctp/socket.c:1197 __sctp_setsockopt_connectx+0x12d/0x180 net/sctp/socket.c:1343 sctp_setsockopt_connectx_old net/sctp/socket.c:1359 [inline] sctp_setsockopt net/sctp/socket.c:4713 [inline] sctp_setsockopt+0x1619/0x70d0 net/sctp/socket.c:4677 compat_sock_common_setsockopt+0xf6/0x120 net/core/sock.c:3275 __compat_sys_setsockopt+0x15d/0x310 net/compat.c:402 __do_compat_sys_setsockopt net/compat.c:415 [inline] __se_compat_sys_setsockopt net/compat.c:412 [inline] __ia32_compat_sys_setsockopt+0xb9/0x150 net/compat.c:412 do_syscall_32_irqs_on+0x3f/0x60 arch/x86/entry/common.c:403 __do_fast_syscall_32 arch/x86/entry/common.c:448 [inline] do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:474 entry_SYSENTER_compat+0x6d/0x7c arch/x86/entry/entry_64_compat.S:138 RIP: 0023:0xf7fa4569 Code: Bad RIP value. RSP: 002b:00000000f5d9f0cc EFLAGS: 00000296 ORIG_RAX: 000000000000016e RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000000000084 RDX: 000000000000006b RSI: 000000002055bfe4 RDI: 000000000000001c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..