rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2677 jiffies s: 1517 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5155 Comm: syz-executor.1 Not tainted 6.5.0-rc5-syzkaller-00296-gf8de32cc060b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:native_apic_mem_write+0xc/0x10 arch/x86/include/asm/apic.h:110 Code: bf 30 08 00 00 e8 c4 85 17 03 48 89 d8 5b c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 89 ff 89 b7 00 c0 5f ff 0f 1f 00 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffffc900001e0c18 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8c39ce60 RCX: 1ffff11017325102 RDX: 1ffffffff18739cc RSI: 0000000000000000 RDI: 00000000000000b0 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1d57432 R10: ffffffff8eaba197 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f996a7a16c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe4a2d0ecc CR3: 0000000022431000 CR4: 0000000000350ee0 Call Trace: apic_eoi arch/x86/include/asm/apic.h:399 [inline] ack_APIC_irq arch/x86/include/asm/apic.h:445 [inline] __sysvec_apic_timer_interrupt+0x7d/0x430 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x42/0xc0 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x11/0x70 kernel/kcov.c:207 Code: b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 8b 05 dd b0 7d 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e RSP: 0018:ffffc900001e0d08 EFLAGS: 00000246 RAX: 0000000000000102 RBX: ffff88807a4eb000 RCX: 0000000000000102 RDX: ffff88801fcc8000 RSI: ffffffff885941ae RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: ffffc900001e0ff8 R12: ffff88806549e000 R13: ffffffff8eac2da0 R14: ffff88802a8ee000 R15: ffff88806549e018 taprio_dequeue_from_txq+0x15e/0x8d0 net/sched/sch_taprio.c:731 taprio_dequeue_tc_priority+0x289/0x4b0 net/sched/sch_taprio.c:798 taprio_dequeue+0x12e/0x5f0 net/sched/sch_taprio.c:868 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1c4/0x19d0 net/sched/sch_generic.c:415 qdisc_run include/net/pkt_sched.h:125 [inline] qdisc_run include/net/pkt_sched.h:122 [inline] net_tx_action+0x71e/0xc80 net/core/dev.c:5049 __do_softirq+0x218/0x965 kernel/softirq.c:553 do_softirq kernel/softirq.c:454 [inline] do_softirq+0xaa/0xe0 kernel/softirq.c:441 __local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:381 spin_unlock_bh include/linux/spinlock.h:396 [inline] dev_reset_queue+0xb9/0x1d0 net/sched/sch_generic.c:1295 netdev_for_each_tx_queue include/linux/netdevice.h:2517 [inline] dev_deactivate_many+0x36f/0xb10 net/sched/sch_generic.c:1359 dev_deactivate+0xed/0x1b0 net/sched/sch_generic.c:1382 qdisc_graft+0xde1/0x1680 net/sched/sch_api.c:1108 tc_modify_qdisc+0xcd2/0x1bf0 net/sched/sch_api.c:1731 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6428 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2549 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9969a7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f996a7a10c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9969b9bf80 RCX: 00007f9969a7cae9 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 00007f9969ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f9969b9bf80 R15: 00007ffff9304798