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BUG: KCSAN: data-race in ext4_free_inodes_count / ext4_free_inodes_set

write to 0xffff888103ebb00e of 2 bytes by task 1819 on cpu 0:
 ext4_free_inodes_set+0x1b/0x80 fs/ext4/super.c:403
 ext4_free_inode+0x615/0xa30 fs/ext4/ialloc.c:323
 ext4_evict_inode+0xbff/0xf10 fs/ext4/inode.c:333
 evict+0x1aa/0x410 fs/inode.c:664
 iput_final fs/inode.c:1744 [inline]
 iput+0x3ef/0x580 fs/inode.c:1770
 d_delete_notify include/linux/fsnotify.h:261 [inline]
 vfs_rmdir+0x270/0x320 fs/namei.c:4032
 do_rmdir+0x18d/0x330 fs/namei.c:4080
 __do_sys_rmdir fs/namei.c:4099 [inline]
 __se_sys_rmdir fs/namei.c:4097 [inline]
 __x64_sys_rmdir+0x2c/0x30 fs/namei.c:4097
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888103ebb00e of 2 bytes by task 1831 on cpu 1:
 ext4_free_inodes_count+0x18/0x80 fs/ext4/super.c:347
 __ext4_new_inode+0x959/0x30b0 fs/ext4/ialloc.c:1042
 ext4_mkdir+0x28a/0x760 fs/ext4/namei.c:2929
 vfs_mkdir+0x216/0x320 fs/namei.c:3933
 do_mkdirat+0x12e/0x2c0 fs/namei.c:3959
 __do_sys_mkdir fs/namei.c:3979 [inline]
 __se_sys_mkdir fs/namei.c:3977 [inline]
 __x64_sys_mkdir+0x40/0x50 fs/namei.c:3977
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x1b57 -> 0x1b58

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1831 Comm: syz-executor.3 Not tainted 5.17.0-rc2-syzkaller-00060-g88808fbbead4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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