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BUG: KCSAN: data-race in mem_cgroup_protected / mem_cgroup_protected

write to 0xffff8880a5e43138 of 8 bytes by task 13979 on cpu 0:
 mem_cgroup_protected+0x236/0x2a0 mm/memcontrol.c:6432
 shrink_node+0x21e/0xb30 mm/vmscan.c:2777
 shrink_zones mm/vmscan.c:3027 [inline]
 do_try_to_free_pages+0x242/0x940 mm/vmscan.c:3085
 try_to_free_pages+0x1ed/0x4a0 mm/vmscan.c:3298
 __perform_reclaim mm/page_alloc.c:4121 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4142 [inline]
 __alloc_pages_slowpath+0x45c/0xee0 mm/page_alloc.c:4559
 __alloc_pages_nodemask+0x2c8/0x310 mm/page_alloc.c:4773
 alloc_pages_current+0xd1/0x170 mm/mempolicy.c:2188
 alloc_pages include/linux/gfp.h:509 [inline]
 __vmalloc_area_node mm/vmalloc.c:2432 [inline]
 __vmalloc_node_range+0x2d7/0x4c0 mm/vmalloc.c:2496
 vmalloc_user+0x65/0x80 mm/vmalloc.c:2626
 vb2_vmalloc_alloc+0xb1/0x1a0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:48
 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:215 [inline]
 __vb2_queue_alloc+0x385/0x870 drivers/media/common/videobuf2/videobuf2-core.c:370
 vb2_core_create_bufs+0x205/0x5b0 drivers/media/common/videobuf2/videobuf2-core.c:849
 vb2_create_bufs+0x2d0/0x3e0 drivers/media/common/videobuf2/videobuf2-v4l2.c:742
 vb2_ioctl_create_bufs+0x27c/0x2f0 drivers/media/common/videobuf2/videobuf2-v4l2.c:947

write to 0xffff8880a5e43138 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
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