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BUG: KCSAN: data-race in ktime_get_with_offset / timekeeping_update_from_shadow

write to 0xffffffff8963c948 of 320 bytes by interrupt on cpu 0:
 timekeeping_update_from_shadow+0x46e/0x4b0 kernel/time/timekeeping.c:869
 __timekeeping_advance+0xb36/0xcf0 kernel/time/timekeeping.c:2666
 timekeeping_advance kernel/time/timekeeping.c:2674 [inline]
 update_wall_time+0x21/0x50 kernel/time/timekeeping.c:2684
 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:2079 [inline]
 __hrtimer_run_queues+0x1f8/0x510 kernel/time/hrtimer.c:2136
 hrtimer_interrupt+0x27b/0x860 kernel/time/hrtimer.c:2255
 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
 kcsan_setup_watchpoint+0x429/0x4a0 kernel/kcsan/core.c:714
 __scm_recv_common+0x46/0x370 net/core/scm.c:-1
 scm_recv_unix+0x37/0x190 net/core/scm.c:587
 __unix_dgram_recvmsg+0x7cc/0x8d0 net/unix/af_unix.c:2674
 unix_dgram_recvmsg+0x7e/0x90 net/unix/af_unix.c:2694
 sock_recvmsg_nosec+0xc2/0xf0 net/socket.c:1154
 ____sys_recvmsg+0x23f/0x250 net/socket.c:2931
 ___sys_recvmsg+0x156/0x3a0 net/socket.c:2978
 do_recvmmsg+0x1e4/0x540 net/socket.c:3073
 __sys_recvmmsg net/socket.c:3147 [inline]
 __do_sys_recvmmsg net/socket.c:3170 [inline]
 __se_sys_recvmmsg net/socket.c:3163 [inline]
 __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3163
 x64_sys_call+0x77f/0x2550 arch/x86/include/generated/asm/syscalls_64.h:300
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x116/0x380 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff8963c958 of 8 bytes by task 22529 on cpu 1:
 timekeeping_cycles_to_ns kernel/time/timekeeping.c:460 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:483 [inline]
 ktime_get_with_offset+0xed/0x260 kernel/time/timekeeping.c:1051
 ktime_get_boottime include/linux/timekeeping.h:105 [inline]
 ktime_get_boottime_ns include/linux/timekeeping.h:194 [inline]
 copy_process+0x19b6/0x2400 kernel/fork.c:2470
 kernel_clone+0x1c0/0x5f0 kernel/fork.c:2798
 __do_sys_clone3 kernel/fork.c:3101 [inline]
 __se_sys_clone3+0x1f5/0x230 kernel/fork.c:3080
 __x64_sys_clone3+0x31/0x40 kernel/fork.c:3080
 x64_sys_call+0x437/0x2550 arch/x86/include/generated/asm/syscalls_64.h:436
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x116/0x380 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000019e509d9dc3 -> 0x0000019e51ed56c2

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 22529 Comm: syz.2.3901 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
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