rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2682 jiffies s: 193937 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: 28392 Comm: syz-executor.3 Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x70 kernel/kcov.c:206
Code: 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 7d 75 7f 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 <65> 48 8b 14 25 c0 bb 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82
RSP: 0018:ffffc900001e0610 EFLAGS: 00000206
RAX: 0000000000000301 RBX: ffff88802d1c6790 RCX: 0000000000000100
RDX: ffff88807ba93b80 RSI: ffffffff883f1cb8 RDI: 0000000000000001
RBP: ffff88802c416000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0200000000000000 R12: dffffc0000000000
R13: ffff88802c4162e0 R14: ffff88802c4162f0 R15: 0000000000000001
FS:  0000555555ae1400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f94335abf84 CR3: 0000000027efa000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000006
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __list_add include/linux/list.h:72 [inline]
 list_add_tail include/linux/list.h:102 [inline]
 list_move_tail include/linux/list.h:230 [inline]
 fq_pie_qdisc_dequeue+0x728/0x9c0 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_resolve_output net/core/neighbour.c:1552 [inline]
 neigh_resolve_output+0x51b/0x870 net/core/neighbour.c:1532
 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:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data+0x21/0x90 kernel/kcov.c:236
Code: 2e 0f 1f 84 00 00 00 00 00 65 8b 05 b1 7a 7f 7e 49 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 49 89 f8 65 48 8b 14 25 c0 bb 03 00 <a9> 00 01 ff 00 74 0e 85 f6 74 59 8b 82 0c 16 00 00 85 c0 74 4f 8b
RSP: 0018:ffffc90006b9f890 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffffffff89ffded3
RDX: ffff88807ba93b80 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff8880214ac800 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000094001 R12: 00007f9433528fff
R13: 0000000000000003 R14: 0000000000000018 R15: ffff88801476c800
 mt_slot lib/maple_tree.c:824 [inline]
 mas_slot lib/maple_tree.c:857 [inline]
 mas_get_slot lib/maple_tree.c:6646 [inline]
 mas_validate_gaps lib/maple_tree.c:6944 [inline]
 mt_validate+0x2703/0x41f0 lib/maple_tree.c:7212
 validate_mm_mt+0xa1/0x3f0 mm/mmap.c:314
 __split_vma+0x5f5/0x830 mm/mmap.c:2304
 split_vma+0xc6/0x110 mm/mmap.c:2318
 mprotect_fixup+0x891/0xbd0 mm/mprotect.c:686
 do_mprotect_pkey+0x87f/0xd50 mm/mprotect.c:860
 __do_sys_mprotect mm/mprotect.c:881 [inline]
 __se_sys_mprotect mm/mprotect.c:878 [inline]
 __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:878
 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: 0033:0x7f943348c277
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 0a 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:00007f94336cfab8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 0000000000021000 RCX: 00007f943348c277
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f94341ba000
RBP: 00007f94336cfb90 R08: 00000000ffffffff R09: 00007f94341d9700
R10: 0000000000020022 R11: 0000000000000206 R12: 00007f94336cfcb0
R13: 00007f94341d9700 R14: 0000000000000000 R15: 0000000000022000
 </TASK>