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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

write to 0xffff888237c1ed60 of 8 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x189/0x7b0 kernel/time/hrtimer.c:1806
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
 __sysvec_apic_timer_interrupt+0x73/0x210 arch/x86/kernel/apic/apic.c:1115
 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1109
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:705
 crc32_body lib/crc32.c:111 [inline]
 crc32_le_generic lib/crc32.c:179 [inline]
 __crc32c_le_base+0x116/0x520 lib/crc32.c:201
 chksum_update+0x32/0x50 crypto/crc32c_generic.c:88
 crypto_shash_update+0x136/0x1a0 crypto/shash.c:134
 ext4_chksum fs/ext4/ext4.h:2458 [inline]
 ext4_dirblock_csum fs/ext4/namei.c:381 [inline]
 ext4_dirblock_csum_set fs/ext4/namei.c:429 [inline]
 ext4_handle_dirty_dirblock+0x26d/0x340 fs/ext4/namei.c:437
 add_dirent_to_buf+0x35e/0x440 fs/ext4/namei.c:2211
 ext4_add_entry+0x3e3/0x1eb0 fs/ext4/namei.c:2444
 ext4_add_nondir+0x50/0x190 fs/ext4/namei.c:2792
 ext4_symlink+0x4c5/0x580 fs/ext4/namei.c:3431
 vfs_symlink+0xc2/0x1a0 fs/namei.c:4477
 do_symlinkat+0xe3/0x320 fs/namei.c:4503
 __do_sys_symlinkat fs/namei.c:4519 [inline]
 __se_sys_symlinkat fs/namei.c:4516 [inline]
 __x64_sys_symlinkat+0x62/0x70 fs/namei.c:4516
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237c1ed60 of 8 bytes by task 4033 on cpu 1:
 print_cpu+0x2fb/0x640 kernel/time/timer_list.c:133
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x612/0x8f0 fs/seq_file.c:272
 proc_reg_read_iter+0x114/0x180 fs/proc/inode.c:305
 call_read_iter include/linux/fs.h:1871 [inline]
 copy_splice_read+0x26b/0x4b0 fs/splice.c:367
 vfs_splice_read fs/splice.c:996 [inline]
 splice_direct_to_actor+0x28c/0x690 fs/splice.c:1072
 do_splice_direct+0x10d/0x190 fs/splice.c:1197
 do_sendfile+0x3b6/0x9a0 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000023a0ecf305 -> 0x7fffffffffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4033 Comm: syz-executor.2 Not tainted 6.5.0-rc7-syzkaller-00018-g89bf6209cad6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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