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BUG: KCSAN: data-race in ktime_get / timekeeping_update_from_shadow

write to 0xffffffff89609548 of 320 bytes by interrupt on cpu 0:
 timekeeping_update_from_shadow+0x46e/0x4b0 kernel/time/timekeeping.c:868
 __timekeeping_advance+0xb36/0xcf0 kernel/time/timekeeping.c:2665
 timekeeping_advance kernel/time/timekeeping.c:2673 [inline]
 update_wall_time+0x21/0x50 kernel/time/timekeeping.c:2683
 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:2075 [inline]
 __hrtimer_run_queues+0x1f8/0x510 kernel/time/hrtimer.c:2132
 hrtimer_interrupt+0x27b/0x860 kernel/time/hrtimer.c:2251
 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+0x32/0x80 arch/x86/kernel/apic/apic.c:1062
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674

read to 0xffffffff89609568 of 8 bytes by task 22407 on cpu 1:
 timekeeping_cycles_to_ns kernel/time/timekeeping.c:477 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:482 [inline]
 ktime_get+0x130/0x240 kernel/time/timekeeping.c:1006
 ktime_get_ns include/linux/timekeeping.h:174 [inline]
 tcp_clock_ns include/net/tcp.h:979 [inline]
 tcp_mstamp_refresh_inline include/net/tcp.h:1019 [inline]
 tcp_mstamp_refresh+0x14/0x70 net/ipv4/tcp_output.c:57
 tcp_connect+0xd53/0x2400 net/ipv4/tcp_output.c:4378
 tcp_v4_connect+0xa04/0xad0 net/ipv4/tcp_ipv4.c:345
 __inet_stream_connect+0x166/0x840 net/ipv4/af_inet.c:684
 inet_stream_connect+0x44/0x70 net/ipv4/af_inet.c:755
 connect_socket net/socket.c:2141 [inline]
 __sys_connect_file net/socket.c:2166 [inline]
 __sys_connect+0x1ef/0x2a0 net/socket.c:2183
 __do_sys_connect net/socket.c:2189 [inline]
 __se_sys_connect net/socket.c:2186 [inline]
 __x64_sys_connect+0x3f/0x50 net/socket.c:2186
 x64_sys_call+0x1c0b/0x2550 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x002ee57a0a72a6ea -> 0x002f726829ec5e9c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 22407 Comm: syz.8.7072 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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