==================================================================
BUG: KCSAN: data-race in evict / insert_inode_locked

write to 0xffff8880b7d9c6c8 of 8 bytes by task 32616 on cpu 1:
 hlist_add_head include/linux/list.h:787 [inline]
 insert_inode_locked+0x2db/0x3b0 fs/inode.c:1474
 __ext4_new_inode+0x17b2/0x2ec0 fs/ext4/ialloc.c:1107
 ext4_create+0x152/0x370 fs/ext4/namei.c:2587
 lookup_open fs/namei.c:3224 [inline]
 do_last fs/namei.c:3314 [inline]
 path_openat+0x2b4b/0x36e0 fs/namei.c:3525
 do_filp_open+0x11e/0x1b0 fs/namei.c:3555
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 __do_sys_openat fs/open.c:1124 [inline]
 __se_sys_openat fs/open.c:1118 [inline]
 __x64_sys_openat+0x62/0x80 fs/open.c:1118
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880b7d9c6c8 of 8 bytes by task 7631 on cpu 0:
 inode_unhashed include/linux/fs.h:749 [inline]
 remove_inode_hash include/linux/fs.h:3075 [inline]
 evict+0x2a0/0x410 fs/inode.c:584
 iput_final fs/inode.c:1563 [inline]
 iput+0x371/0x4e0 fs/inode.c:1589
 dentry_unlink_inode+0x270/0x2e0 fs/dcache.c:374
 d_delete fs/dcache.c:2449 [inline]
 d_delete+0xdb/0xe0 fs/dcache.c:2438
 vfs_rmdir fs/namei.c:3884 [inline]
 vfs_rmdir+0x2e2/0x300 fs/namei.c:3849
 do_rmdir+0x2cb/0x300 fs/namei.c:3932
 __do_sys_rmdir fs/namei.c:3950 [inline]
 __se_sys_rmdir fs/namei.c:3948 [inline]
 __x64_sys_rmdir+0x2f/0x40 fs/namei.c:3948
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7631 Comm: syz-executor.1 Not tainted 5.4.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================