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BUG: KCSAN: data-race in __filemap_remove_folio / filemap_write_and_wait_range

read-write to 0xffff88810a9898a8 of 8 bytes by task 8633 on cpu 1:
 page_cache_delete mm/filemap.c:147 [inline]
 __filemap_remove_folio+0x22f/0x330 mm/filemap.c:225
 __remove_mapping+0x35b/0x480 mm/vmscan.c:1410
 remove_mapping+0x23/0xa0 mm/vmscan.c:1443
 mapping_evict_folio mm/truncate.c:282 [inline]
 invalidate_mapping_pagevec+0x2a9/0x3f0 mm/truncate.c:521
 invalidate_mapping_pages+0x27/0x30 mm/truncate.c:559
 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:779
 do_splice_from fs/splice.c:857 [inline]
 direct_splice_actor+0x84/0xa0 fs/splice.c:1023
 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:978
 do_splice_direct+0x104/0x180 fs/splice.c:1066
 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 0xffff88810a9898a8 of 8 bytes by task 8642 on cpu 0:
 mapping_needs_writeback mm/filemap.c:628 [inline]
 filemap_write_and_wait_range+0x54/0x220 mm/filemap.c:677
 ext4_dio_write_iter fs/ext4/file.c:630 [inline]
 ext4_file_write_iter+0xaef/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:779
 do_splice_from fs/splice.c:857 [inline]
 direct_splice_actor+0x84/0xa0 fs/splice.c:1023
 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:978
 do_splice_direct+0x104/0x180 fs/splice.c:1066
 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: 0x000000000000000f -> 0x0000000000000002

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8642 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-05127-g5c7ecada25d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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