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BUG: KCSAN: data-race in inc_node_page_state / release_pages

write to 0xffffea00019421c0 of 8 bytes by task 20652 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+0x402/0x8f0 mm/swap.c:899
 __pagevec_release+0x96/0xc0 mm/swap.c:933
 pagevec_release include/linux/pagevec.h:88 [inline]
 truncate_inode_pages_range+0xcf4/0xf70 mm/truncate.c:453
 truncate_inode_pages mm/truncate.c:476 [inline]
 truncate_pagecache+0x4f/0x70 mm/truncate.c:817
 ext4_setattr+0xb05/0xec0 fs/ext4/inode.c:5403
 notify_change+0x7d7/0xa80 fs/attr.c:336
 do_truncate+0xe0/0x120 fs/open.c:64
 handle_truncate fs/namei.c:2909 [inline]
 do_open fs/namei.c:3255 [inline]
 path_openat+0x1a31/0x20a0 fs/namei.c:3368
 do_filp_open+0xbd/0x1d0 fs/namei.c:3395
 do_sys_openat2+0x33b/0x500 fs/open.c:1168
 do_sys_open fs/open.c:1184 [inline]
 __do_sys_openat fs/open.c:1200 [inline]
 __se_sys_openat fs/open.c:1195 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1195
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea00019421c0 of 8 bytes by task 25 on cpu 0:
 page_to_nid include/linux/mm.h:1287 [inline]
 page_pgdat include/linux/mm.h:1434 [inline]
 inc_node_page_state+0xe/0xc0 mm/vmstat.c:603
 test_clear_page_writeback+0x408/0x480 mm/page-writeback.c:2766
 end_page_writeback+0xa7/0x110 mm/filemap.c:1369
 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:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25 Comm: kworker/u4:2 Not tainted 5.9.0-rc1-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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