rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=c37/1/0x4000000000000000 softirq=64095/64099 fqs=0 
	(t=10500 jiffies g=87965 q=825)
rcu: rcu_preempt kthread starved for 10500 jiffies! g87965 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:26464 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14992 Comm: syz.3.3686 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:perf_trace_buf_alloc+0x6f/0x2e0 kernel/trace/trace_event_perf.c:409
Code: 01 00 00 49 bd 00 00 00 00 00 fc ff df e8 59 6a 19 00 89 c5 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 b5 01 00 00 89 2b <31> ff 89 ee e8 c8 d2 f7 ff 85 ed 0f 88 a5 00 00 00 89 eb 4d 85 f6
RSP: 0018:ffffc90000dcf640 EFLAGS: 00000097
RAX: 0000000000000004 RBX: ffffc90000dcf720 RCX: 0000000000dcf703
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffffffff81a1f616 R09: fffffbfff1bd2c16
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000034
R13: dffffc0000000000 R14: ffffc90000dcf700 R15: dffffc0000000000
FS:  00007f8948d406c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c31a981 CR3: 0000000074c24000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 perf_trace_lock+0x1e4/0x440 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x93c/0x9a0 kernel/locking/lockdep.c:5634
 seqcount_lockdep_reader_access+0x10b/0x220 include/linux/seqlock.h:104
 ktime_get_update_offsets_now+0x38/0x420 kernel/time/timekeeping.c:2300
 hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
 hrtimer_interrupt+0x12f/0x980 kernel/time/hrtimer.c:1796
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp4+0x28/0x80 kernel/kcov.c:267
Code: 1f 00 4c 8b 04 24 65 48 8b 15 e4 13 82 7e 65 8b 05 e5 13 82 7e 25 00 01 ff 00 74 10 3d 00 01 00 00 75 5b 83 ba 34 16 00 00 00 <74> 52 8b 82 10 16 00 00 83 f8 03 75 47 48 8b 8a 18 16 00 00 44 8b
RSP: 0018:ffffc90000dcfc00 EFLAGS: 00000246
RAX: 0000000000000100 RBX: ffff8880651aff00 RCX: ffff88801959d940
RDX: ffff88801959d940 RSI: 0000000000000007 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff89117cfd R09: fffffbfff20e2419
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000007 R14: dffffc0000000000 R15: ffff888022ffec00
 __ipv6_addr_label+0xad/0x3c0 net/ipv6/addrlabel.c:134
 ipv6_addr_label+0xb2/0x1a0 net/ipv6/addrlabel.c:149
 ipv6_get_saddr_eval+0x5de/0xea0 net/ipv6/addrconf.c:1623
 __ipv6_dev_get_saddr+0x1d3/0x4a0 net/ipv6/addrconf.c:1712
 ipv6_dev_get_saddr+0x50e/0xbb0 net/ipv6/addrconf.c:1848
 ip6_route_get_saddr include/net/ip6_route.h:145 [inline]
 ip6_dst_lookup_tail+0xc87/0x11a0 net/ipv6/ip6_output.c:1107
 ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1232
 geneve_get_v6_dst+0x852/0xb80 drivers/net/geneve.c:873
 geneve6_xmit_skb drivers/net/geneve.c:1007 [inline]
 geneve_xmit+0x84a/0x3460 drivers/net/geneve.c:1090
 __netdev_start_xmit include/linux/netdevice.h:5019 [inline]
 netdev_start_xmit include/linux/netdevice.h:5033 [inline]
 xmit_one net/core/dev.c:3617 [inline]
 dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633
 __dev_queue_xmit+0x1cee/0x3230 net/core/dev.c:4248
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0xee8/0x15a0 net/ipv6/ip6_output.c:130
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xae0/0x13c0 net/ipv6/ndisc.c:511
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3959
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_release+0x62d/0x9a0 kernel/locking/lockdep.c:5647
Code: 3c 3b 00 74 08 4c 89 f7 e8 10 4b 67 00 f6 84 24 91 00 00 00 02 75 6f 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900040b7660 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000816ede RCX: ffffc900040b7603
RDX: 0000000000000000 RSI: ffffffff8a8b3da0 RDI: ffffffff8ad904c0
RBP: ffffc900040b7788 R08: dffffc0000000000 R09: fffffbfff1bd2c16
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000816ed8
R13: 0000000000000246 R14: ffffc900040b76f0 R15: dffffc0000000000
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:403 [inline]
 setup_vmalloc_vm mm/vmalloc.c:2384 [inline]
 __get_vm_area_node+0x2b5/0x2f0 mm/vmalloc.c:2431
 __vmalloc_node_range+0xe3/0x8c0 mm/vmalloc.c:3019
 __vmalloc_node mm/vmalloc.c:3079 [inline]
 vmalloc+0x75/0x80 mm/vmalloc.c:3112
 netlink_alloc_large_skb net/netlink/af_netlink.c:1203 [inline]
 netlink_sendmsg+0x644/0xd60 net/netlink/af_netlink.c:1895
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485
 __sys_sendmsg net/socket.c:2514 [inline]
 __do_sys_sendmsg net/socket.c:2523 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f894a8c7ff9
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:00007f8948d40038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f894aa7ff80 RCX: 00007f894a8c7ff9
RDX: 0000000000000600 RSI: 0000000020000540 RDI: 000000000000000c
RBP: 00007f894a93a296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f894aa7ff80 R15: 00007ffeb5e53358
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 14996 Comm: syz.2.3688 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:free_unref_page+0x213/0x2d0 mm/page_alloc.c:3418
Code: 2b 00 74 08 4c 89 ff e8 0b c5 0a 00 f6 44 24 41 02 0f 85 83 00 00 00 41 f7 c4 00 02 00 00 74 01 fb 48 c7 44 24 20 0e 36 e0 45 <4b> c7 44 35 00 00 00 00 00 66 43 c7 44 35 09 00 00 43 c6 44 35 0b
RSP: 0018:ffffc90000007820 EFLAGS: 00000206
RAX: b31540dbd040c700 RBX: 1ffff92000000f0c RCX: ffffffff81631ae8
RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: ffffffff8ad904c0
RBP: ffffc90000007900 R08: dffffc0000000000 R09: fffffbfff20e2430
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: dffffc0000000000 R14: 1ffff92000000f08 R15: ffffc90000007860
 put_page include/linux/mm.h:1247 [inline]
 __skb_frag_unref include/linux/skbuff.h:3236 [inline]
 skb_release_data+0x411/0x8a0 net/core/skbuff.c:672
 skb_release_all net/core/skbuff.c:742 [inline]
 __kfree_skb+0x4c/0x60 net/core/skbuff.c:756
 tcp_write_queue_purge+0x132/0x3e0 net/ipv4/tcp.c:2963
 tcp_done_with_error+0x3d/0xc0 net/ipv4/tcp_input.c:4358
 tcp_write_err net/ipv4/tcp_timer.c:70 [inline]
 tcp_write_timeout net/ipv4/tcp_timer.c:273 [inline]
 tcp_retransmit_timer+0x112b/0x2680 net/ipv4/tcp_timer.c:543
 tcp_write_timer_handler+0x1f7/0x970 net/ipv4/tcp_timer.c:655
 tcp_write_timer+0x12e/0x280 net/ipv4/tcp_timer.c:675
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:93 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x37/0x240 kernel/entry/common.c:114
Code: 49 89 fe 48 8b 7c 24 30 e8 46 f6 ff ff e9 8d 01 00 00 e9 91 01 00 00 e8 a7 84 52 f7 e8 92 82 52 f7 fb 65 4c 8b 3d 29 17 ce 75 <49> 8b 5f 08 f6 c3 3f 0f 84 ce 00 00 00 f6 c3 20 74 17 4c 89 f7 e8
RSP: 0018:ffffc900040c7ef8 EFLAGS: 00000282
RAX: b31540dbd040c700 RBX: ffffc900040c7f30 RCX: ffffffff96868f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: ffffffff8ad904c0
RBP: ffffc900040c7f48 R08: ffffffff8186dcf8 R09: ffffed101720765a
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000141 R14: ffffc900040c7f58 R15: ffff88802a215940
 do_syscall_64+0x1e/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fed3bcc8ff9
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:00007fed3a141038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fed3be80f80 RCX: 00007fed3bcc8ff9
RDX: 0000000000000094 RSI: 00000000200006c0 RDI: 0000000000000005
RBP: 00007fed3bd3b296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fed3be80f80 R15: 00007ffdf498a058
 </TASK>