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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff888237d1b260 of 8 bytes by interrupt on cpu 1:
 hrtimer_interrupt+0x193/0x460 kernel/time/hrtimer.c:1879
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x6f/0x80 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 watchpoint_slot kernel/kcsan/encoding.h:90 [inline]
 find_watchpoint kernel/kcsan/core.c:119 [inline]
 check_access kernel/kcsan/core.c:737 [inline]
 __tsan_unaligned_write4+0x14/0x190 kernel/kcsan/core.c:1024
 ____sys_recvmsg+0xa2/0x280 net/socket.c:2778
 ___sys_recvmsg+0x11f/0x370 net/socket.c:2828
 do_recvmmsg+0x1ef/0x540 net/socket.c:2923
 __sys_recvmmsg net/socket.c:2997 [inline]
 __do_sys_recvmmsg net/socket.c:3020 [inline]
 __se_sys_recvmmsg net/socket.c:3013 [inline]
 __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3013
 x64_sys_call+0x1c6a/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:300
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237d1b260 of 8 bytes by task 9385 on cpu 0:
 print_cpu+0x30b/0x680 kernel/time/timer_list.c:133
 timer_list_show+0x107/0x170 kernel/time/timer_list.c:295
 seq_read_iter+0x319/0x940 fs/seq_file.c:230
 proc_reg_read_iter+0x110/0x180 fs/proc/inode.c:299
 do_iter_readv_writev+0x421/0x4c0 fs/read_write.c:-1
 vfs_readv+0x1ea/0x690 fs/read_write.c:1018
 do_preadv fs/read_write.c:1132 [inline]
 __do_sys_preadv fs/read_write.c:1179 [inline]
 __se_sys_preadv fs/read_write.c:1174 [inline]
 __x64_sys_preadv+0xfd/0x1c0 fs/read_write.c:1174
 x64_sys_call+0x1503/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:296
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x000000257c00f47c -> 0x000000257c04243f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 9385 Comm: syz.3.1892 Not tainted 6.16.0-rc6-syzkaller-00253-g4871b7cb27f4 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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