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BUG: KCSAN: data-race in hrtimer_interrupt / print_tickdevice.isra.0

write to 0xffff88812c119318 of 8 bytes by interrupt on cpu 1:
 hrtimer_interrupt+0xa5/0x480 kernel/time/hrtimer.c:1620
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 __sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:180
 tcp_transmit_skb net/ipv4/tcp_output.c:1250 [inline]
 tcp_write_xmit+0x5a3/0x3200 net/ipv4/tcp_output.c:2513
 tcp_push_one+0x95/0xb0 net/ipv4/tcp_output.c:2703
 tcp_sendmsg_locked+0x11c4/0x20d0 net/ipv4/tcp.c:1383
 tcp_sendmsg+0x39/0x60 net/ipv4/tcp.c:1433
 inet_sendmsg+0x6d/0x90 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:672
 sock_write_iter+0x18b/0x240 net/socket.c:1004
 call_write_iter include/linux/fs.h:1901 [inline]
 new_sync_write+0x388/0x4a0 fs/read_write.c:483
 __vfs_write+0xb1/0xc0 fs/read_write.c:496
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x18a/0x390 fs/read_write.c:542
 ksys_write+0x17b/0x1b0 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x4c/0x60 fs/read_write.c:620
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88812c119318 of 8 bytes by task 8741 on cpu 0:
 print_tickdevice.isra.0+0x14d/0x3d0 kernel/time/timer_list.c:219
 timer_list_show+0x89/0x140 kernel/time/timer_list.c:316
 traverse fs/seq_file.c:113 [inline]
 traverse+0x10a/0x410 fs/seq_file.c:91
 seq_read+0x673/0x9d0 fs/seq_file.c:188
 proc_reg_read+0xe9/0x140 fs/proc/inode.c:223
 do_loop_readv_writev fs/read_write.c:714 [inline]
 do_loop_readv_writev fs/read_write.c:701 [inline]
 do_iter_read+0x357/0x3d0 fs/read_write.c:935
 vfs_readv+0x9c/0xf0 fs/read_write.c:1053
 do_preadv+0x131/0x1d0 fs/read_write.c:1145
 __do_sys_preadv fs/read_write.c:1195 [inline]
 __se_sys_preadv fs/read_write.c:1190 [inline]
 __x64_sys_preadv+0x61/0x80 fs/read_write.c:1190
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8741 Comm: syz-executor.0 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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