GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 19016 at kernel/sched/core.c:3013 rq_unlock kernel/sched/sched.h:1326 [inline] WARNING: CPU: 1 PID: 19016 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x214/0x2c0 kernel/sched/core.c:3019 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 19016 Comm: syz-executor.4 Not tainted 5.8.0-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+0x14/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:try_invoke_on_locked_down_task+0x214/0x2c0 kernel/sched/core.c:3013 Code: 45 31 f6 49 39 c0 74 3a 8b 74 24 38 49 8d 78 18 4c 89 04 24 e8 6d 95 08 00 4c 8b 04 24 4c 89 c7 e8 71 c4 a0 06 e9 29 ff ff ff <0f> 0b e9 86 fe ff ff 4c 89 ee 48 89 ef 41 ff d4 41 89 c6 e9 11 ff RSP: 0018:ffffc90000da8bd8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff920001b517d RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff81610310 RDI: ffff88802a4de140 RBP: ffff88802a4de140 R08: 0000000000000033 R09: ffffffff89bcb3c3 R10: 0000000000005460 R11: 0000000000000001 R12: ffffffff81610310 R13: ffffc90000da8d00 R14: ffff88802a4de4c0 R15: ffff8880ae736c40 rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:634 [inline] rcu_pending kernel/rcu/tree.c:3635 [inline] rcu_sched_clock_irq.cold+0x92e/0xccd kernel/rcu/tree.c:2518 update_process_times+0x25/0xa0 kernel/time/timer.c:1710 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __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:706 __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+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:ipv6_addr_equal include/net/ipv6.h:579 [inline] RIP: 0010:__sctp_v6_cmp_addr+0x214/0x520 net/sctp/ipv6.c:591 Code: 00 e8 70 76 0a fa 66 41 83 fd 0a 0f 84 8b 01 00 00 e8 00 7a 0a fa 44 89 ee bf 02 00 00 00 e8 53 76 0a fa eb bb e8 ec 79 0a fa <4c> 8d 6b 08 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 RSP: 0018:ffffc90013aaf870 EFLAGS: 00000246 RAX: 0000000000040000 RBX: ffff88803dcad320 RCX: ffffc90011171000 RDX: 0000000000040000 RSI: ffffffff8769a2f4 RDI: 0000000000000002 RBP: ffffc90013aaf950 R08: 0000000000000001 R09: ffff888022c738bb R10: 000000000000000a R11: 0000000000000001 R12: 000000000000000a R13: 000000000000000a R14: ffffffff8a9a9b00 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/0x460 net/sctp/bind_addr.c:56 sctp_connect_new_asoc+0x1cd/0x770 net/sctp/socket.c:1078 sctp_sendmsg_new_asoc net/sctp/socket.c:1676 [inline] sctp_sendmsg+0x1377/0x1cf0 net/sctp/socket.c:1986 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 __sys_sendto+0x21c/0x320 net/socket.c:1994 __do_sys_sendto net/socket.c:2006 [inline] __se_sys_sendto net/socket.c:2002 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2002 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ce69 Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff78bd21c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000002c3c0 RCX: 000000000045ce69 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000118bf78 R08: 000000002005ffe4 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffc48eb5e9f R14: 00007ff78bd229c0 R15: 000000000118bf2c Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..