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BUG: KCSAN: data-race in __zone_watermark_ok / get_page_from_freelist

read to 0xffff88812fffce88 of 8 bytes by task 7239 on cpu 0:
 __zone_watermark_ok+0x106/0x240 mm/page_alloc.c:3444
 zone_watermark_fast mm/page_alloc.c:3494 [inline]
 get_page_from_freelist+0x629/0x2300 mm/page_alloc.c:3635
 __alloc_pages_nodemask+0x255/0x4d0 mm/page_alloc.c:4714
 __alloc_pages include/linux/gfp.h:473 [inline]
 __alloc_pages_node include/linux/gfp.h:486 [inline]
 kmem_getpages mm/slab.c:1366 [inline]
 cache_grow_begin+0x76/0x670 mm/slab.c:2599
 cache_alloc_refill mm/slab.c:2971 [inline]
 ____cache_alloc mm/slab.c:3054 [inline]
 ____cache_alloc mm/slab.c:3037 [inline]
 __do_cache_alloc mm/slab.c:3276 [inline]
 slab_alloc mm/slab.c:3311 [inline]
 kmem_cache_alloc+0x500/0x5d0 mm/slab.c:3483
 sk_prot_alloc+0x5a/0x240 net/core/sock.c:1597
 sk_alloc+0x51/0x540 net/core/sock.c:1657
 inet6_create net/ipv6/af_inet6.c:180 [inline]
 inet6_create+0x23a/0x830 net/ipv6/af_inet6.c:107
 __sock_create+0x241/0x3a0 net/socket.c:1418
 sock_create net/socket.c:1469 [inline]
 __sys_socket+0x96/0x170 net/socket.c:1511
 __do_sys_socket net/socket.c:1520 [inline]
 __se_sys_socket net/socket.c:1518 [inline]
 __x64_sys_socket+0x4c/0x60 net/socket.c:1518
 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88812fffce88 of 8 bytes by task 7269 on cpu 1:
 add_to_free_area include/linux/mmzone.h:108 [inline]
 expand mm/page_alloc.c:2033 [inline]
 __rmqueue_smallest mm/page_alloc.c:2192 [inline]
 __rmqueue mm/page_alloc.c:2711 [inline]
 rmqueue_bulk mm/page_alloc.c:2738 [inline]
 __rmqueue_pcplist mm/page_alloc.c:3209 [inline]
 rmqueue_pcplist mm/page_alloc.c:3237 [inline]
 rmqueue mm/page_alloc.c:3259 [inline]
 get_page_from_freelist+0x131e/0x2300 mm/page_alloc.c:3677
 __alloc_pages_nodemask+0x255/0x4d0 mm/page_alloc.c:4714
 alloc_pages_current+0xd1/0x170 mm/mempolicy.c:2153
 alloc_pages include/linux/gfp.h:509 [inline]
 __vmalloc_area_node mm/vmalloc.c:2424 [inline]
 __vmalloc_node_range+0x2d5/0x4d0 mm/vmalloc.c:2488
 vmalloc_user+0x65/0x80 mm/vmalloc.c:2618
 kcov_mmap+0x2e/0x150 kernel/kcov.c:280
 call_mmap include/linux/fs.h:1875 [inline]
 mmap_region+0x83c/0xd50 mm/mmap.c:1788
 do_mmap+0x6b0/0xb20 mm/mmap.c:1561
 do_mmap_pgoff include/linux/mm.h:2374 [inline]
 vm_mmap_pgoff+0x12d/0x190 mm/util.c:391
 ksys_mmap_pgoff+0x2d8/0x420 mm/mmap.c:1611
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline]
 __x64_sys_mmap+0x91/0xc0 arch/x86/kernel/sys_x86_64.c:91
 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7269 Comm: syz-executor.5 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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