==================================================================
BUG: KCSAN: data-race in ext4_es_lookup_extent / ext4_es_lookup_extent

read to 0xffff888126b09c28 of 8 bytes by task 8077 on cpu 0:
 ext4_es_lookup_extent+0x3ba/0x510 fs/ext4/extents_status.c:950
 ext4_map_blocks+0xc2/0xf70 fs/ext4/inode.c:530
 ext4_mpage_readpages+0x92b/0x1270 fs/ext4/readpage.c:182
 ext4_readpages+0x92/0xc0 fs/ext4/inode.c:3388
 read_pages+0xa2/0x2d0 mm/readahead.c:126
 __do_page_cache_readahead+0x353/0x390 mm/readahead.c:212
 ra_submit mm/internal.h:62 [inline]
 ondemand_readahead+0x35d/0x710 mm/readahead.c:492
 page_cache_sync_readahead+0x1ad/0x1e0 mm/readahead.c:527
 generic_file_buffered_read mm/filemap.c:2071 [inline]
 generic_file_read_iter+0xeb6/0x1440 mm/filemap.c:2344
 ext4_file_read_iter fs/ext4/file.c:77 [inline]
 ext4_file_read_iter+0xfa/0x240 fs/ext4/file.c:65
 call_read_iter include/linux/fs.h:1864 [inline]
 generic_file_splice_read+0x35c/0x500 fs/splice.c:307
 do_splice_to+0xf2/0x130 fs/splice.c:877
 splice_direct_to_actor+0x1a1/0x510 fs/splice.c:954
 do_splice_direct+0x161/0x1e0 fs/splice.c:1063

write to 0xffff888126b09c28 of 8 bytes by task 8074 on cpu 1:
 ext4_es_lookup_extent+0x3d3/0x510 fs/ext4/extents_status.c:950
 ext4_map_blocks+0xc2/0xf70 fs/ext4/inode.c:530
 _ext4_get_block+0x12d/0x2b0 fs/ext4/inode.c:791
 ext4_get_block_trans+0xf4/0x1d0 fs/ext4/inode.c:852
 ext4_dio_get_block_unwritten_sync+0x59/0xc0 fs/ext4/inode.c:924
 get_more_blocks fs/direct-io.c:710 [inline]
 do_direct_IO+0x1409/0x59b0 fs/direct-io.c:995
 do_blockdev_direct_IO+0x6b7/0x4cc0 fs/direct-io.c:1327
 __blockdev_direct_IO+0x86/0xa0 fs/direct-io.c:1413
 ext4_direct_IO_write fs/ext4/inode.c:3788 [inline]
 ext4_direct_IO+0x6f5/0xf70 fs/ext4/inode.c:3915
 generic_file_direct_write+0x14d/0x2e0 mm/filemap.c:3230
 __generic_file_write_iter+0x17e/0x380 mm/filemap.c:3413
 ext4_file_write_iter+0x1fc/0xa40 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1870 [inline]
 do_iter_readv_writev+0x487/0x5b0 fs/read_write.c:693

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8074 Comm: syz-executor.3 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================