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BUG: KCSAN: data-race in dec_zone_page_state / release_pages

write to 0xffffea0004ab6b00 of 8 bytes by task 7919 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:337 [inline]
 release_pages+0x41c/0x8b0 mm/swap.c:940
 __pagevec_release+0xa7/0xd0 mm/swap.c:972
 pagevec_release include/linux/pagevec.h:88 [inline]
 __invalidate_mapping_pages+0x6c6/0x720 mm/truncate.c:610
 invalidate_mapping_pages+0x23/0x30 mm/truncate.c:635
 __generic_file_write_iter+0x2e6/0x330 mm/filemap.c:3430
 generic_file_write_iter+0x75/0x130 mm/filemap.c:3472
 call_write_iter include/linux/fs.h:1887 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4b0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x42a/0x780 fs/splice.c:686
 do_splice_from fs/splice.c:764 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:933
 splice_direct_to_actor+0x345/0x650 fs/splice.c:888
 do_splice_direct+0xf5/0x170 fs/splice.c:976
 do_sendfile+0x574/0xb70 fs/read_write.c:1257
 __do_sys_sendfile64 fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1304
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea0004ab6b00 of 8 bytes by interrupt on cpu 1:
 page_to_nid include/linux/mm.h:1302 [inline]
 page_zone include/linux/mm.h:1444 [inline]
 dec_zone_page_state+0x13/0x100 mm/vmstat.c:542
 test_clear_page_writeback+0x3ba/0x450 mm/page-writeback.c:2765
 end_page_writeback+0xa7/0x110 mm/filemap.c:1487
 page_endio+0x1be/0x200 mm/filemap.c:1518
 mpage_end_io+0x186/0x1d0 fs/mpage.c:54
 bio_endio+0x28b/0x350 block/bio.c:1450
 req_bio_endio block/blk-core.c:263 [inline]
 blk_update_request+0x4d5/0xb00 block/blk-core.c:1467
 blk_mq_end_request+0x22/0x50 block/blk-mq.c:562
 lo_complete_rq+0xca/0x180 drivers/block/loop.c:500
 blk_done_softirq+0x145/0x190 block/blk-mq.c:586
 __do_softirq+0x12c/0x2b1 kernel/softirq.c:298
 run_ksoftirqd+0x13/0x20 kernel/softirq.c:653
 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165
 kthread+0x1fa/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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