Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
BUG: KCSAN: data-race in data_push_tail / string

write to 0xffffffff86e87882 of 1 bytes by task 20701 on cpu 0:
 string_nocheck lib/vsprintf.c:647 [inline]
 string+0x17b/0x220 lib/vsprintf.c:725
 set_capacity_and_notify+0x170/0x1d0 block/genhd.c:90

read to 0xffffffff86e87880 of 8 bytes by task 20699 on cpu 1:
 data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline]
 data_push_tail+0x10f/0x440 kernel/printk/printk_ringbuffer.c:675
Reported by Kernel Concurrency Sanitizer on:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 <TASK>
RIP: 0033:0x7f20f7d9b217
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f20f7d9b217
RDX: 00000000000001ff RSI: 0000000020000100 RDI: 00000000ffffff9c