ip6_tunnel: ip6gre2 xmit: Local address not yet configured!
ip6_tunnel: ip6gre2 xmit: Local address not yet configured!
==================================================================
BUG: KCSAN: data-race in ktime_get_with_offset / timekeeping_update_from_shadow

write to 0xffffffff895fa508 of 320 bytes by interrupt on cpu 1:
 timekeeping_update_from_shadow+0x448/0x480 kernel/time/timekeeping.c:866
 __timekeeping_advance+0xb36/0xcf0 kernel/time/timekeeping.c:2663
 timekeeping_advance kernel/time/timekeeping.c:2671 [inline]
 update_wall_time+0x21/0x50 kernel/time/timekeeping.c:2681
 tick_do_update_jiffies64+0x169/0x1c0 kernel/time/tick-sched.c:149
 tick_sched_do_timer kernel/time/tick-sched.c:253 [inline]
 tick_nohz_handler+0x88/0x380 kernel/time/tick-sched.c:310
 __run_hrtimer kernel/time/hrtimer.c:2074 [inline]
 __hrtimer_run_queues+0x1f8/0x510 kernel/time/hrtimer.c:2131
 hrtimer_interrupt+0x27b/0x860 kernel/time/hrtimer.c:2250
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x5f/0x1c0 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1062
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:123 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
 _raw_spin_unlock_irqrestore+0x1a/0x30 kernel/locking/spinlock.c:221
 spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
 __uart_port_unlock_irqrestore include/linux/serial_core.h:622 [inline]
 univ8250_console_device_unlock+0x36/0x40 drivers/tty/serial/8250/8250_core.c:420
 nbcon_emit_one kernel/printk/nbcon.c:1165 [inline]
 nbcon_kthread_func+0x595/0x690 kernel/printk/nbcon.c:1271
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffffffff895fa528 of 8 bytes by task 70 on cpu 0:
 timekeeping_cycles_to_ns kernel/time/timekeeping.c:477 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:482 [inline]
 ktime_get_with_offset+0x150/0x260 kernel/time/timekeeping.c:1048
 ktime_get_real include/linux/timekeeping.h:87 [inline]
 netif_rx_internal+0x1ec/0x210 net/core/dev.c:5791
 __netif_rx+0x21/0x170 net/core/dev.c:5834
 veth_forward_skb drivers/net/veth.c:326 [inline]
 veth_xmit+0x303/0x700 drivers/net/veth.c:380
 __netdev_start_xmit include/linux/netdevice.h:5432 [inline]
 netdev_start_xmit include/linux/netdevice.h:5441 [inline]
 xmit_one net/core/dev.c:3953 [inline]
 dev_hard_start_xmit+0x10c/0x380 net/core/dev.c:3969
 __dev_queue_xmit+0xbfd/0x1ec0 net/core/dev.c:4958
 dev_queue_xmit include/linux/netdevice.h:3464 [inline]
 neigh_resolve_output+0x3fb/0x470 net/core/neighbour.c:1616
 neigh_output include/net/neighbour.h:560 [inline]
 ip6_finish_output2+0x8c9/0xdb0 net/ipv6/ip6_output.c:138
 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline]
 ip6_finish_output+0x1e1/0x410 net/ipv6/ip6_output.c:221
 NF_HOOK_COND include/linux/netfilter.h:314 [inline]
 ip6_output+0x10a/0x280 net/ipv6/ip6_output.c:248
 dst_output include/net/dst.h:472 [inline]
 NF_HOOK include/linux/netfilter.h:325 [inline]
 ndisc_send_skb+0x52c/0x7a0 net/ipv6/ndisc.c:513
 ndisc_send_ns+0x78/0xe0 net/ipv6/ndisc.c:672
 addrconf_dad_work+0x714/0xbc0 net/ipv6/addrconf.c:4318
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3479
 worker_thread+0x569/0x750 kernel/workqueue.c:3560
 kthread+0x223/0x270 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00106c83ad91ef5c -> 0x0010f9ee874e6c1e

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 70 Comm: kworker/u8:4 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: ipv6_addrconf addrconf_dad_work
==================================================================
bond2: (slave macvlan2): failed to get link speed/duplex
bond2: (slave macvlan2): failed to get link speed/duplex
bond2: (slave macvlan2): failed to get link speed/duplex
bond2: (slave macvlan2): failed to get link speed/duplex