rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P4239 0-.... } 4461 jiffies s: 9861 root: 0x1/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4239 Comm: syz.4.18 Not tainted 6.1.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:seqcount_lockdep_reader_access+0x1dc/0x220 include/linux/seqlock.h:105
Code: 00 4d 85 ed 75 16 e8 63 86 10 00 eb 15 e8 5c 86 10 00 e8 27 b6 2c 09 4d 85 ed 74 ea e8 4d 86 10 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00
RSP: 0018:ffffc90000006fc0 EFLAGS: 00000006
RAX: ffffffff817a0cfd RBX: 0000000000000000 RCX: ffff88807f7e3b80
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007078 R08: ffffffff817a0ce9 R09: fffffbfff1d34036
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000046 R15: 1ffff92000000df8
FS:  00007faa005676c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a0fff8 CR3: 00000000592ff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
 ktime_get+0x7f/0x270 kernel/time/timekeeping.c:848
 clockevents_program_event+0xe1/0x310 kernel/time/clockevents.c:326
 hrtimer_interrupt+0x546/0x980 kernel/time/hrtimer.c:1828
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 4f 7a 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90000007300 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000000e6c RCX: 1ffff92000000e0c
RDX: dffffc0000000000 RSI: ffffffff8b0c1440 RDI: ffffffff8b5d7540
RBP: ffffc90000007448 R08: dffffc0000000000 R09: fffffbfff224605a
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000e68
R13: dffffc0000000000 R14: ffffc90000007360 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock_bh include/linux/rcupdate.h:845 [inline]
 __dev_queue_xmit+0x307/0x3d50 net/core/dev.c:4220
 dev_queue_xmit include/linux/netdevice.h:3021 [inline]
 neigh_hh_output include/net/neighbour.h:528 [inline]
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0xeae/0x15f0 net/ipv6/ip6_output.c:138
 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline]
 ip6_finish_output+0x6a0/0xa80 net/ipv6/ip6_output.c:216
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbab/0x14e0 net/ipv6/ndisc.c:511
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3963
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:finish_task_switch+0x1d3/0x810 kernel/sched/core.c:5120
Code: 38 0b 00 48 83 c4 08 4c 89 f7 e8 68 31 00 00 0f 1f 44 00 00 4c 89 f7 e8 bb c5 51 09 e8 76 f3 31 00 fb 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 0f b6 04 28
RSP: 0018:ffffc9000372ed88 EFLAGS: 00000282
RAX: fe977e8ea9a94300 RBX: ffff88802ce25974 RCX: ffffffff816b09aa
RDX: dffffc0000000000 RSI: ffffffff8b0c02c0 RDI: ffff88807f7e5178
RBP: ffffc9000372edd0 R08: dffffc0000000000 R09: fffffbfff2246064
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807f7e3b80
R13: 1ffff110171c76e3 R14: ffff8880b8e3a9c0 R15: ffff8880b8e3b718
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x1447/0x4570 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:ipv6_get_saddr_eval+0x6ae/0xe90 net/ipv6/addrconf.c:1643
Code: bb ff ff ff f0 23 5d 00 bf 20 01 00 10 89 de e8 78 50 28 f8 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 ef e8 b2 ce 7f f8 <49> 8b 6d 00 48 89 e8 48 c1 e8 03 4d 89 f5 42 0f b6 04 30 84 c0 0f
RSP: 0018:ffffc9000372f118 EFLAGS: 00000246
RAX: 1ffff920006e5e54 RBX: 00000000000080fe RCX: 0000000000040000
RDX: ffff88807f7e3b80 RSI: 00000000000080fe RDI: 0000000010000120
RBP: ffff888056bd3800 R08: ffffffff89624648 R09: ffffffff89624016
R10: 000000000000000b R11: ffff88807f7e3b80 R12: ffffc9000372f260
R13: ffffc9000372f2a0 R14: dffffc0000000000 R15: 0000000000000008
 __ipv6_dev_get_saddr+0x1d3/0x4a0 net/ipv6/addrconf.c:1712
 ipv6_dev_get_saddr+0x417/0xbc0 net/ipv6/addrconf.c:1848
 ip6_route_get_saddr include/net/ip6_route.h:152 [inline]
 ip6_dst_lookup_tail+0xebc/0x1470 net/ipv6/ip6_output.c:1129
 ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1255
 sctp_v6_get_dst+0x950/0x1e40 net/sctp/ipv6.c:327
 sctp_transport_route+0x10c/0x2b0 net/sctp/transport.c:455
 sctp_assoc_add_peer+0x60a/0x15b0 net/sctp/associola.c:664
 sctp_connect_new_asoc+0x30f/0x6a0 net/sctp/socket.c:1097
 sctp_sendmsg_new_asoc net/sctp/socket.c:1691 [inline]
 sctp_sendmsg+0x1cd9/0x3370 net/sctp/socket.c:2002
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2519
 ___sys_sendmsg net/socket.c:2573 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2602
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa9ff77dff9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faa00567038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa9ff936058 RCX: 00007fa9ff77dff9
RDX: 00000000000080c4 RSI: 00000000200017c0 RDI: 0000000000000004
RBP: 00007fa9ff7f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa9ff936058 R15: 00007ffeaba2c828
 </TASK>