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BUG: KCSAN: data-race in inc_node_page_state / release_pages

write to 0xffffea0004726780 of 8 bytes by task 21008 on cpu 0:
 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+0x39a/0x860 mm/swap.c:898
 __pagevec_release+0x96/0xc0 mm/swap.c:932
 pagevec_release include/linux/pagevec.h:88 [inline]
 invalidate_mapping_pages+0x676/0x6d0 mm/truncate.c:620
 __generic_file_write_iter+0x2e1/0x330 mm/filemap.c:3418
 generic_file_write_iter+0x2f3/0x3e0 mm/filemap.c:3460
 call_write_iter include/linux/fs.h:1907 [inline]
 do_iter_readv_writev+0x321/0x3c0 fs/read_write.c:694
 do_iter_write+0x10e/0x470 fs/read_write.c:999
 vfs_iter_write+0x4c/0x70 fs/read_write.c:1040
 iter_file_splice_write+0x41a/0x770 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 direct_splice_actor+0x95/0x160 fs/splice.c:1016
 splice_direct_to_actor+0x365/0x660 fs/splice.c:971
 do_splice_direct+0xf2/0x170 fs/splice.c:1059
 do_sendfile+0x562/0xb10 fs/read_write.c:1521
 __do_sys_sendfile64 fs/read_write.c:1582 [inline]
 __se_sys_sendfile64 fs/read_write.c:1568 [inline]
 __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1568
 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea0004726780 of 8 bytes by interrupt on cpu 1:
 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+0x3c3/0x440 mm/page-writeback.c:2768
 end_page_writeback+0x8e/0xf0 mm/filemap.c:1314
 page_endio+0x1aa/0x1e0 mm/filemap.c:1345
 mpage_end_io+0x186/0x1d0 fs/mpage.c:54
 bio_endio+0x34c/0x490 block/bio.c:1445
 req_bio_endio block/blk-core.c:261 [inline]
 blk_update_request+0x535/0xbd0 block/blk-core.c:1569
 blk_mq_end_request+0x22/0x50 block/blk-mq.c:571
 lo_complete_rq+0xca/0x180 drivers/block/loop.c:500
 blk_done_softirq+0x1a5/0x200 block/blk-softirq.c:37
 __do_softirq+0x198/0x360 kernel/softirq.c:292
 run_ksoftirqd+0x2f/0x60 kernel/softirq.c:630
 smpboot_thread_fn+0x347/0x530 kernel/smpboot.c:165
 kthread+0x210/0x220 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.8.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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