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BUG: KCSAN: data-race in __filemap_remove_folio / filemap_write_and_wait_range

read-write to 0xffff888108df23a0 of 8 bytes by task 14694 on cpu 1:
 page_cache_delete mm/filemap.c:147 [inline]
 __filemap_remove_folio+0x224/0x320 mm/filemap.c:225
 __remove_mapping+0x35b/0x480 mm/vmscan.c:1467
 remove_mapping+0x23/0xa0 mm/vmscan.c:1500
 mapping_evict_folio mm/truncate.c:282 [inline]
 invalidate_mapping_pagevec+0x2a9/0x3f0 mm/truncate.c:522
 invalidate_mapping_pages+0x27/0x30 mm/truncate.c:560
 ext4_dio_write_iter fs/ext4/file.c:633 [inline]
 ext4_file_write_iter+0xd24/0x10e0 fs/ext4/file.c:708
 do_iter_write+0x4ae/0x770 fs/read_write.c:860
 vfs_iter_write+0x50/0x70 fs/read_write.c:901
 iter_file_splice_write+0x456/0x7d0 fs/splice.c:795
 do_splice_from fs/splice.c:873 [inline]
 direct_splice_actor+0x84/0xa0 fs/splice.c:1039
 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:994
 do_splice_direct+0x104/0x180 fs/splice.c:1082
 do_sendfile+0x3b8/0x950 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888108df23a0 of 8 bytes by task 14692 on cpu 0:
 mapping_needs_writeback mm/filemap.c:628 [inline]
 filemap_write_and_wait_range+0x54/0x220 mm/filemap.c:677
 __iomap_dio_rw+0x5dc/0x1100 fs/iomap/direct-io.c:569
 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:688
 ext4_dio_read_iter fs/ext4/file.c:94 [inline]
 ext4_file_read_iter+0x210/0x290 fs/ext4/file.c:145
 call_read_iter include/linux/fs.h:1862 [inline]
 generic_file_splice_read+0xe3/0x290 fs/splice.c:419
 do_splice_to fs/splice.c:902 [inline]
 splice_direct_to_actor+0x25a/0x5f0 fs/splice.c:973
 do_splice_direct+0x104/0x180 fs/splice.c:1082
 do_sendfile+0x3b8/0x950 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000000005 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14692 Comm: syz-executor.2 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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