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BUG: KCSAN: data-race in __add_to_page_cache_locked / filemap_write_and_wait_range

write to 0xffff88812d57dbe0 of 8 bytes by task 14014 on cpu 1:
 __add_to_page_cache_locked+0x276/0x4f0 mm/filemap.c:931
 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:984
 pagecache_get_page+0x6ad/0x910 mm/filemap.c:1951
 grab_cache_page_write_begin+0x3f/0x70 mm/filemap.c:3724
 ext4_da_write_begin+0x2f9/0x7f0 fs/ext4/inode.c:2990
 generic_perform_write+0x1b8/0x3e0 mm/filemap.c:3770
 ext4_buffered_write_iter+0x305/0x400 fs/ext4/file.c:269
 ext4_file_write_iter+0x2e7/0x11f0
 call_write_iter include/linux/fs.h:2163 [inline]
 aio_write+0x2b4/0x390 fs/aio.c:1578
 io_submit_one+0x86f/0x13b0 fs/aio.c:1880
 __do_sys_io_submit fs/aio.c:1939 [inline]
 __se_sys_io_submit+0x105/0x270 fs/aio.c:1909
 __x64_sys_io_submit+0x3f/0x50 fs/aio.c:1909
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88812d57dbe0 of 8 bytes by task 14019 on cpu 0:
 mapping_needs_writeback mm/filemap.c:639 [inline]
 filemap_write_and_wait_range+0x36/0x3c0 mm/filemap.c:703
 ext4_punch_hole+0x14c/0x9d0 fs/ext4/inode.c:4026
 ext4_fallocate+0xea/0x4d0 fs/ext4/extents.c:4668
 vfs_fallocate+0x459/0x6a0 fs/open.c:307
 ksys_fallocate fs/open.c:330 [inline]
 __do_sys_fallocate fs/open.c:338 [inline]
 __se_sys_fallocate fs/open.c:336 [inline]
 __x64_sys_fallocate+0x75/0xc0 fs/open.c:336
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000707 -> 0x000000000000070a

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14019 Comm: syz-executor.3 Tainted: G        W         5.15.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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