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BUG: KCSAN: data-race in __delete_from_page_cache / page_mapping

write to 0xffffea000447cf98 of 8 bytes by task 16764 on cpu 1:
 page_cache_delete mm/filemap.c:140 [inline]
 __delete_from_page_cache+0x196/0x490 mm/filemap.c:238
 invalidate_complete_page2 mm/truncate.c:651 [inline]
 invalidate_inode_pages2_range+0x6ad/0xab0 mm/truncate.c:744
 iomap_dio_complete+0x2cd/0x3c0 fs/iomap/direct-io.c:108
 iomap_dio_rw+0x8e3/0x9a0 fs/iomap/direct-io.c:569
 ext4_dio_write_iter fs/ext4/file.c:532 [inline]
 ext4_file_write_iter+0xb84/0xd30 fs/ext4/file.c:640
 call_write_iter include/linux/fs.h:1901 [inline]
 do_iter_readv_writev+0x4a7/0x5d0 fs/read_write.c:693
 do_iter_write fs/read_write.c:998 [inline]
 do_iter_write+0x137/0x3a0 fs/read_write.c:979
 vfs_iter_write+0x56/0x80 fs/read_write.c:1039
 iter_file_splice_write+0x530/0x830 fs/splice.c:760
 do_splice_from fs/splice.c:863 [inline]
 direct_splice_actor+0x97/0xb0 fs/splice.c:1037
 splice_direct_to_actor+0x22f/0x540 fs/splice.c:992
 do_splice_direct+0x152/0x1d0 fs/splice.c:1080
 do_sendfile+0x396/0x810 fs/read_write.c:1520
 __do_sys_sendfile64 fs/read_write.c:1581 [inline]
 __se_sys_sendfile64 fs/read_write.c:1567 [inline]
 __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1567
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffea000447cf98 of 8 bytes by task 16758 on cpu 0:
 page_mapping+0x178/0x290 mm/util.c:675
 page_evictable+0x37/0x100 mm/vmscan.c:4295
 __pagevec_lru_add_fn+0xe0/0x820 mm/swap.c:963
 pagevec_lru_move_fn+0xf5/0x170 mm/swap.c:211
 __pagevec_lru_add mm/swap.c:987 [inline]
 __lru_cache_add+0x119/0x1c0 mm/swap.c:411
 lru_cache_add+0x1b/0x30 mm/swap.c:447
 add_to_page_cache_lru+0x16b/0x260 mm/filemap.c:937
 generic_file_buffered_read mm/filemap.c:2215 [inline]
 generic_file_read_iter+0xf1a/0x1490 mm/filemap.c:2302
 ext4_file_read_iter fs/ext4/file.c:131 [inline]
 ext4_file_read_iter+0x103/0x360 fs/ext4/file.c:114
 call_read_iter include/linux/fs.h:1895 [inline]
 generic_file_splice_read+0x2df/0x470 fs/splice.c:313
 do_splice_to+0xc7/0x100 fs/splice.c:892
 splice_direct_to_actor+0x1b9/0x540 fs/splice.c:971
 do_splice_direct+0x152/0x1d0 fs/splice.c:1080
 do_sendfile+0x396/0x810 fs/read_write.c:1520
 __do_sys_sendfile64 fs/read_write.c:1581 [inline]
 __se_sys_sendfile64 fs/read_write.c:1567 [inline]
 __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1567
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16758 Comm: syz-executor.0 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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