==================================================================
BUG: KCSAN: data-race in __do_page_fault / do_task_stat

read to 0xffff8881217aa610 of 8 bytes by task 7427 on cpu 1:
 do_task_stat+0x4c7/0x1370 fs/proc/array.c:503
 proc_tgid_stat+0x3d/0x60 fs/proc/array.c:632
 proc_single_show+0x89/0xe0 fs/proc/base.c:756
 seq_read+0x350/0x960 fs/seq_file.c:229
 __vfs_read+0x67/0xc0 fs/read_write.c:425
 vfs_read fs/read_write.c:461 [inline]
 vfs_read+0x143/0x2c0 fs/read_write.c:446
 ksys_read+0xd5/0x1b0 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read fs/read_write.c:595 [inline]
 __x64_sys_read+0x4c/0x60 fs/read_write.c:595
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8881217aa610 of 8 bytes by task 7239 on cpu 0:
 do_user_addr_fault arch/x86/mm/fault.c:1481 [inline]
 __do_page_fault+0x6b1/0x9e0 arch/x86/mm/fault.c:1506
 do_page_fault+0x54/0x233 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7239 Comm: udevd Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7239 Comm: udevd Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf5/0x159 lib/dump_stack.c:113
 panic+0x210/0x640 kernel/panic.c:221
 kcsan_report.cold+0xc/0x10 kernel/kcsan/report.c:302
 __kcsan_setup_watchpoint+0x32e/0x4a0 kernel/kcsan/core.c:411
 __tsan_write8 kernel/kcsan/kcsan.c:36 [inline]
 __tsan_write8+0x32/0x40 kernel/kcsan/kcsan.c:36
 do_user_addr_fault arch/x86/mm/fault.c:1481 [inline]
 __do_page_fault+0x6b1/0x9e0 arch/x86/mm/fault.c:1506
 do_page_fault+0x54/0x233 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202
RIP: 0033:0x415eb0
Code: 00 48 89 84 24 a8 14 00 00 31 c0 48 85 ff 0f 84 da 00 00 00 48 85 f6 48 89 f5 0f 84 ce 00 00 00 4c 8d af f0 00 00 00 4c 89 ef <e8> 8b e4 ff ff 48 89 ee 48 89 c7 e8 60 e5 ff ff 48 85 c0 48 89 c3
RSP: 002b:00007ffc6a2dca00 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 00007ffc6a2ddfd0 RCX: 0000000000000200
RDX: 0000000000000000 RSI: 00007ffc6a2ddfd0 RDI: 0000000001c5d0c0
RBP: 00007ffc6a2ddfd0 R08: 0000000000000001 R09: 00007f30d7dffe00
R10: 74656e2f73656369 R11: 00007f30d7e31a50 R12: 0000000001c5cfd0
R13: 0000000001c5d0c0 R14: 0000000000000001 R15: 0000000001c68159
Kernel Offset: disabled
Rebooting in 86400 seconds..