==================================================================
BUG: KCSAN: data-race in mem_cgroup_protected / mem_cgroup_protected

write to 0xffff8880a2cbf138 of 8 bytes by task 1767 on cpu 0:
 mem_cgroup_protected+0x236/0x2a0 mm/memcontrol.c:6432
 shrink_node+0x21e/0xb30 mm/vmscan.c:2777
 kswapd_shrink_node mm/vmscan.c:3549 [inline]
 balance_pgdat+0x60e/0xbf0 mm/vmscan.c:3707
 kswapd+0x35b/0x800 mm/vmscan.c:3958
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

write to 0xffff8880a2cbf138 of 8 bytes by task 1766 on cpu 1:
 mem_cgroup_protected+0x236/0x2a0 mm/memcontrol.c:6432
 shrink_node+0x21e/0xb30 mm/vmscan.c:2777
 kswapd_shrink_node mm/vmscan.c:3549 [inline]
 balance_pgdat+0x60e/0xbf0 mm/vmscan.c:3707
 kswapd+0x35b/0x800 mm/vmscan.c:3958
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1766 Comm: kswapd0 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: 1 PID: 1766 Comm: kswapd0 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
 mem_cgroup_protected+0x236/0x2a0 mm/memcontrol.c:6432
 shrink_node+0x21e/0xb30 mm/vmscan.c:2777
 kswapd_shrink_node mm/vmscan.c:3549 [inline]
 balance_pgdat+0x60e/0xbf0 mm/vmscan.c:3707
 kswapd+0x35b/0x800 mm/vmscan.c:3958
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..