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BUG: KCSAN: data-race in ext4_es_lookup_extent / ext4_es_lookup_extent

write to 0xffff888101b6e570 of 8 bytes by task 14436 on cpu 1:
 ext4_es_set_referenced fs/ext4/extents_status.h:194 [inline]
 ext4_es_lookup_extent+0x2f7/0x500 fs/ext4/extents_status.c:968
 ext4_map_blocks+0x105/0xff0 fs/ext4/inode.c:530
 ext4_mpage_readpages+0x636/0x1550 fs/ext4/readpage.c:304
 ext4_readahead+0x99/0xa0 fs/ext4/inode.c:3262
 read_pages+0x9c/0x6e0 mm/readahead.c:130
 page_cache_ra_unbounded+0x46c/0x4c0 mm/readahead.c:238
 ondemand_readahead+0x560/0x780 mm/readahead.c:267
 page_cache_async_ra+0x1aa/0x1d0 mm/readahead.c:607
 page_cache_async_readahead include/linux/pagemap.h:863 [inline]
 filemap_readahead mm/filemap.c:2350 [inline]
 filemap_get_pages+0x2b4/0x660 mm/filemap.c:2391
 filemap_read+0x1ba/0x7b0 mm/filemap.c:2458
 generic_file_read_iter+0x82/0x410 mm/filemap.c:2609
 ext4_file_read_iter+0x2e0/0x420 fs/ext4/file.c:74
 __kernel_read+0x306/0x580 fs/read_write.c:454
 kernel_read+0x58/0x70 fs/read_write.c:472
 prepare_binprm fs/exec.c:1650 [inline]
 search_binary_handler fs/exec.c:1704 [inline]
 exec_binprm+0x125/0x720 fs/exec.c:1761
 bprm_execve+0x3b8/0x530 fs/exec.c:1830
 do_execveat_common+0x621/0x6e0 fs/exec.c:1919
 do_execve fs/exec.c:1987 [inline]
 __do_sys_execve fs/exec.c:2063 [inline]
 __se_sys_execve fs/exec.c:2058 [inline]
 __x64_sys_execve+0x56/0x70 fs/exec.c:2058
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888101b6e570 of 8 bytes by task 14442 on cpu 0:
 ext4_es_status fs/ext4/extents_status.h:154 [inline]
 ext4_es_is_referenced fs/ext4/extents_status.h:204 [inline]
 ext4_es_lookup_extent+0x2c5/0x500 fs/ext4/extents_status.c:967
 ext4_map_blocks+0x105/0xff0 fs/ext4/inode.c:530
 ext4_mpage_readpages+0x636/0x1550 fs/ext4/readpage.c:304
 ext4_readahead+0x99/0xa0 fs/ext4/inode.c:3262
 read_pages+0x9c/0x6e0 mm/readahead.c:130
 page_cache_ra_unbounded+0x367/0x4c0 mm/readahead.c:225
 ondemand_readahead+0x560/0x780 mm/readahead.c:267
 page_cache_async_ra+0x1aa/0x1d0 mm/readahead.c:607
 page_cache_async_readahead include/linux/pagemap.h:863 [inline]
 filemap_readahead mm/filemap.c:2350 [inline]
 filemap_get_pages+0x2b4/0x660 mm/filemap.c:2391
 filemap_read+0x1ba/0x7b0 mm/filemap.c:2458
 generic_file_read_iter+0x82/0x410 mm/filemap.c:2609
 ext4_file_read_iter+0x2e0/0x420 fs/ext4/file.c:74
 __kernel_read+0x306/0x580 fs/read_write.c:454
 kernel_read+0x58/0x70 fs/read_write.c:472
 prepare_binprm fs/exec.c:1650 [inline]
 search_binary_handler fs/exec.c:1704 [inline]
 exec_binprm+0x125/0x720 fs/exec.c:1761
 bprm_execve+0x3b8/0x530 fs/exec.c:1830
 do_execveat_common+0x621/0x6e0 fs/exec.c:1919
 do_execve fs/exec.c:1987 [inline]
 __do_sys_execve fs/exec.c:2063 [inline]
 __se_sys_execve fs/exec.c:2058 [inline]
 __x64_sys_execve+0x56/0x70 fs/exec.c:2058
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14442 Comm: ifupdown-hotplu Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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