rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2686 jiffies s: 1929 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: 5042 Comm: syz-executor.0 Not tainted 6.4.0-rc3-syzkaller-00740-g60cbd38bb0ad #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xb/0x70 kernel/kcov.c:207
Code: 0f 1e fa 48 8b be a8 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 ed 78 7f 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 c0 bb 03 00 a9
RSP: 0018:ffffc900001e0618 EFLAGS: 00000246
RAX: 0000000000000302 RBX: ffff88804288e830 RCX: 0000000000000100
RDX: ffff88802b3f8000 RSI: ffffffff883f3ac9 RDI: ffff88804618bae8
RBP: ffff88804618b800 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0200000000000000 R12: dffffc0000000000
R13: ffff88804618bae0 R14: ffff88804618baf0 R15: ffff88804618bae0
FS:  0000555556db9400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0748021270 CR3: 000000004c20b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 list_add_tail include/linux/list.h:102 [inline]
 list_move_tail include/linux/list.h:230 [inline]
 fq_pie_qdisc_dequeue+0x6dd/0x9c0 net/sched/sch_fq_pie.c:248
 dequeue_skb net/sched/sch_generic.c:292 [inline]
 qdisc_restart net/sched/sch_generic.c:397 [inline]
 __qdisc_run+0x1b2/0x1780 net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3868 [inline]
 __dev_queue_xmit+0x2215/0x3b10 net/core/dev.c:4210
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 neigh_connected_output+0x3c2/0x550 net/core/neighbour.c:1581
 neigh_output include/net/neighbour.h:544 [inline]
 ip6_finish_output2+0x55a/0x1560 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:292 [inline]
 ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:458 [inline]
 NF_HOOK include/linux/netfilter.h:303 [inline]
 ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718
 addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:unwind_next_frame+0x524/0x1e30 arch/x86/kernel/unwind_orc.c:489
Code: 41 01 48 89 c7 48 c1 ef 03 0f b6 14 17 48 89 cf 83 e7 07 40 38 fe 40 0f 9e c7 40 84 f6 40 0f 95 c6 40 84 f7 0f 85 36 14 00 00 <83> e0 07 38 c2 40 0f 9e c6 84 d2 0f 95 c0 40 84 c6 0f 85 1f 14 00
RSP: 0018:ffffc90003cbf670 EFLAGS: 00000246
RAX: ffffffff8f05cbd3 RBX: 0000000000000001 RCX: ffffffff8f05cbd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90003cbf728 R08: ffffffff8f05cbd6 R09: ffffc90003cbf770
R10: ffffc90003cbf6e0 R11: 0000000000094001 R12: ffffc90003cbf730
R13: ffffc90003cbf6e0 R14: ffffc90003cbf778 R15: 0000000000000000
 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3786 [inline]
 kmem_cache_free+0xe9/0x480 mm/slub.c:3808
 jbd2_free_handle include/linux/jbd2.h:1607 [inline]
 jbd2_journal_stop+0x5eb/0xe50 fs/jbd2/transaction.c:1964
 __ext4_journal_stop+0xe2/0x1f0 fs/ext4/ext4_jbd2.c:133
 __ext4_unlink+0x6a5/0xcd0 fs/ext4/namei.c:3294
 ext4_unlink+0x41f/0x590 fs/ext4/namei.c:3319
 vfs_unlink+0x355/0x930 fs/namei.c:4327
 do_unlinkat+0x3e3/0x680 fs/namei.c:4393
 __do_sys_unlink fs/namei.c:4441 [inline]
 __se_sys_unlink fs/namei.c:4439 [inline]
 __x64_sys_unlink+0xca/0x110 fs/namei.c:4439
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd308a8bad7
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007fff37743568 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd308a8bad7
RDX: 00007fff377435a0 RSI: 00007fff377435a0 RDI: 00007fff37743630
RBP: 00007fff37743630 R08: 0000000000000001 R09: 00007fff37743400
R10: 0000555556dba873 R11: 0000000000000206 R12: 00007fd308ae6cdc
R13: 00007fff377446f0 R14: 0000555556dba810 R15: 00007fff37744730
 </TASK>