rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2651 jiffies s: 561 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5077 Comm: syz-executor266 Not tainted 6.6.0-syzkaller-14263-gaea6bf908d73 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x60 kernel/kcov.c:207 Code: 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 48 8b 14 25 c0 bc 03 00 65 8b 05 34 20 7b 7e 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 RSP: 0018:ffffc90000007d88 EFLAGS: 00000002 RAX: 0000000000010203 RBX: 0000000000000002 RCX: dffffc0000000000 RDX: ffff888026bd8000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff88801f109c00 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: dffffc0000000000 R12: 0000000000000000 R13: ffff88801f109c00 R14: 0000000000000002 R15: ffff888027e67800 FS: 0000555555e77380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000600 CR3: 000000001ecdd000 CR4: 0000000000350ef0 Call Trace: advance_sched+0x3da/0xc60 net/sched/sch_taprio.c:972 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x203/0xc10 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 f6 2a e4 f6 48 89 df e8 ee a9 e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 35 f6 d5 f6 65 8b 05 46 ec 7e 75 85 c0 74 12 5b RSP: 0018:ffffc90003cff0b8 EFLAGS: 00000246 RAX: 0000000000000016 RBX: ffff88801f7372e8 RCX: 1ffffffff23ec894 RDX: 0000000000000000 RSI: ffffffff8accb920 RDI: ffffffff8b2e7fc0 RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff23e2be8 R10: ffffffff91f15f47 R11: 0000000000000002 R12: 7fffffffffffffff R13: 0000000000000002 R14: 0000000000000100 R15: 0000000000000000 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] taprio_change+0x28cb/0x38a0 net/sched/sch_taprio.c:1993 taprio_init+0x6c4/0x950 net/sched/sch_taprio.c:2134 qdisc_create+0x4f7/0x10a0 net/sched/sch_api.c:1326 tc_modify_qdisc+0x4de/0x1c40 net/sched/sch_api.c:1747 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2588 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2642 __sys_sendmsg+0x117/0x1e0 net/socket.c:2671 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc2a6a36069 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc6d4e60a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc2a6a36069 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00007ffc6d4e6130 R09: 00007ffc6d4e6130 R10: 00007ffc6d4e6130 R11: 0000000000000246 R12: 0000000000000031 R13: 0000000000000047 R14: 0000000000050012 R15: 0000000000000003 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.459 msecs