rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2680 jiffies s: 1877 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: 35 Comm: kworker/u8:2 Not tainted 6.10.0-rc3-syzkaller-00174-ga3e18a540541 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x2f/0x70 kernel/kcov.c:207 Code: 8b 04 24 65 48 8b 0c 25 00 d5 03 00 65 8b 15 f0 ad 6d 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 <74> 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b RSP: 0018:ffffc90000006f08 EFLAGS: 00000046 RAX: ffffffff899037ac RBX: ffff88801ed55000 RCX: ffff88801c2b3c00 RDX: 0000000000010102 RSI: 0000000000000004 RDI: ffff88801ed55084 RBP: 0000000000000000 R08: ffff88801ed55087 R09: 1ffff11003daaa10 R10: dffffc0000000000 R11: ffffed1003daaa11 R12: 0000000000000004 R13: ffff88801ed55008 R14: ffff88801ed55084 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556f9c394680 CR3: 0000000011d3a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: taprio_set_budgets+0x32c/0x370 net/sched/sch_taprio.c:664 advance_sched+0x98d/0xca0 net/sched/sch_taprio.c:977 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:stack_trace_consume_entry+0xa7/0x280 kernel/stacktrace.c:93 Code: 41 0f b6 44 15 00 84 c0 0f 85 69 01 00 00 44 89 37 b0 01 e9 95 00 00 00 31 c0 e9 8e 00 00 00 48 89 d8 48 c1 e8 03 80 3c 10 00 <74> 26 4c 89 0c 24 48 89 df 49 89 f5 4d 89 c6 e8 65 0a 7a 00 4d 89 RSP: 0018:ffffc900000073b0 EFLAGS: 00000246 RAX: 1ffff92000000e9c RBX: ffffc900000074e0 RCX: ffff88801c2b3c00 RDX: dffffc0000000000 RSI: ffffffff81fbb417 RDI: ffffc900000074ec RBP: ffffc900000074e8 R08: 0000000000000003 R09: ffffc900000074f0 R10: 0000000000000003 R11: ffffffff8181e050 R12: 1ffff92000000e9d R13: 1ffff92000000e9d R14: 0000000000000000 R15: 1ffff92000000e9e arch_stack_walk+0x143/0x1b0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4512 kfree_skb include/linux/skbuff.h:1257 [inline] ip6_mc_input+0xa1b/0xc30 net/ipv6/ip6_input.c:589 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5625 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5739 process_backlog+0x391/0x7d0 net/core/dev.c:6068 __napi_poll+0xcb/0x490 net/core/dev.c:6722 napi_poll net/core/dev.c:6791 [inline] net_rx_action+0x7bb/0x10a0 net/core/dev.c:6907 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:851 [inline] __dev_queue_xmit+0x16c9/0x3d30 net/core/dev.c:4420 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0xff8/0x1670 net/ipv6/ip6_output.c:137 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab0/0x1380 net/ipv6/ndisc.c:509 ndisc_send_ns+0xcc/0x160 net/ipv6/ndisc.c:667 addrconf_dad_work+0xb45/0x16f0 net/ipv6/addrconf.c:4281 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244