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BUG: KCSAN: data-race in __es_shrink / __es_shrink

write to 0xffff8881038dac78 of 8 bytes by task 12490 on cpu 1:
 __es_shrink+0x3a0/0x560 fs/ext4/extents_status.c:1536
 ext4_es_scan+0x87/0x210 fs/ext4/extents_status.c:1580
 do_shrink_slab+0x28b/0x550 mm/vmscan.c:511
 shrink_slab+0xea/0x1c0 mm/vmscan.c:672
 shrink_node_memcgs+0x27a/0x410 mm/vmscan.c:2665
 shrink_node+0x9fa/0x1220 mm/vmscan.c:2780
 shrink_zones+0x2af/0x490 mm/vmscan.c:2983
 do_try_to_free_pages+0x193/0x6f0 mm/vmscan.c:3038
 try_to_free_pages+0x391/0x870 mm/vmscan.c:3277
 __perform_reclaim mm/page_alloc.c:4379 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4400 [inline]
 __alloc_pages_slowpath+0x52f/0x9c0 mm/page_alloc.c:4804
 __alloc_pages_nodemask+0x269/0x350 mm/page_alloc.c:5014
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2267
 alloc_pages include/linux/gfp.h:547 [inline]
 __vmalloc_area_node mm/vmalloc.c:2510 [inline]
 __vmalloc_node_range+0x2b0/0x510 mm/vmalloc.c:2576
 __bpf_map_area_alloc+0xfd/0x120 kernel/bpf/syscall.c:306
 bpf_map_area_alloc+0x18/0x20 kernel/bpf/syscall.c:313
 prealloc_init kernel/bpf/hashtab.c:284 [inline]
 htab_map_alloc+0x657/0xc70 kernel/bpf/hashtab.c:508
 find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
 map_create kernel/bpf/syscall.c:828 [inline]
 __do_sys_bpf+0x420c/0x9950 kernel/bpf/syscall.c:4364
 __se_sys_bpf kernel/bpf/syscall.c:4340 [inline]
 __x64_sys_bpf+0x3d/0x50 kernel/bpf/syscall.c:4340
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8881038dac78 of 8 bytes by task 12462 on cpu 0:
 __es_shrink+0x374/0x560 fs/ext4/extents_status.c:1536
 ext4_es_scan+0x87/0x210 fs/ext4/extents_status.c:1580
 do_shrink_slab+0x28b/0x550 mm/vmscan.c:511
 shrink_slab+0xea/0x1c0 mm/vmscan.c:672
 shrink_node_memcgs+0x27a/0x410 mm/vmscan.c:2665
 shrink_node+0x9fa/0x1220 mm/vmscan.c:2780
 shrink_zones+0x2af/0x490 mm/vmscan.c:2983
 do_try_to_free_pages+0x193/0x6f0 mm/vmscan.c:3038
 try_to_free_pages+0x391/0x870 mm/vmscan.c:3277
 __perform_reclaim mm/page_alloc.c:4379 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4400 [inline]
 __alloc_pages_slowpath+0x52f/0x9c0 mm/page_alloc.c:4804
 __alloc_pages_nodemask+0x269/0x350 mm/page_alloc.c:5014
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2267
 alloc_pages include/linux/gfp.h:547 [inline]
 __vmalloc_area_node mm/vmalloc.c:2510 [inline]
 __vmalloc_node_range+0x2b0/0x510 mm/vmalloc.c:2576
 __bpf_map_area_alloc+0xfd/0x120 kernel/bpf/syscall.c:306
 bpf_map_area_alloc+0x18/0x20 kernel/bpf/syscall.c:313
 prealloc_init kernel/bpf/hashtab.c:284 [inline]
 htab_map_alloc+0x657/0xc70 kernel/bpf/hashtab.c:508
 find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
 map_create kernel/bpf/syscall.c:828 [inline]
 __do_sys_bpf+0x420c/0x9950 kernel/bpf/syscall.c:4364
 __se_sys_bpf kernel/bpf/syscall.c:4340 [inline]
 __x64_sys_bpf+0x3d/0x50 kernel/bpf/syscall.c:4340
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12462 Comm: syz-executor.5 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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