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BUG: KCSAN: data-race in inc_node_page_state / release_pages

write to 0xffffea000482fd40 of 8 bytes by task 11378 on cpu 1:
 instrument_write include/linux/instrumented.h:42 [inline]
 __clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:42 [inline]
 __ClearPageLRU include/linux/page-flags.h:328 [inline]
 release_pages+0x3b3/0x8c0 mm/swap.c:897
 __pagevec_release+0x96/0xc0 mm/swap.c:931
 pagevec_release include/linux/pagevec.h:88 [inline]
 truncate_inode_pages_range+0x527/0xf10 mm/truncate.c:370
 truncate_pagecache_range+0x80/0x90 mm/truncate.c:931
 ext4_punch_hole+0x371/0xa20 fs/ext4/inode.c:4031
 ext4_fallocate+0xe5/0x560 fs/ext4/extents.c:4659
 vfs_fallocate+0x431/0x580 fs/open.c:309
 ksys_fallocate fs/open.c:332 [inline]
 __do_sys_fallocate fs/open.c:340 [inline]
 __se_sys_fallocate fs/open.c:338 [inline]
 __x64_sys_fallocate+0x75/0xc0 fs/open.c:338
 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea000482fd40 of 8 bytes by task 21 on cpu 0:
 page_to_nid include/linux/mm.h:1276 [inline]
 page_pgdat include/linux/mm.h:1423 [inline]
 inc_node_page_state+0xe/0xb0 mm/vmstat.c:589
 test_clear_page_writeback+0x408/0x480 mm/page-writeback.c:2768
 end_page_writeback+0xa7/0x110 mm/filemap.c:1314
 ext4_finish_bio+0x429/0x490 fs/ext4/page-io.c:146
 ext4_release_io_end+0x98/0x200 fs/ext4/page-io.c:161
 ext4_end_io_end fs/ext4/page-io.c:195 [inline]
 ext4_do_flush_completed_IO fs/ext4/page-io.c:260 [inline]
 ext4_end_io_rsv_work+0x306/0x360 fs/ext4/page-io.c:274
 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269
 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415
 kthread+0x20d/0x230 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
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