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BUG: KCSAN: data-race in ext4_free_inodes_count / ext4_free_inodes_set

write to 0xffff88810260500e of 2 bytes by task 1815 on cpu 1:
 ext4_free_inodes_set+0x1b/0x80 fs/ext4/super.c:403
 __ext4_new_inode+0x1dd3/0x30b0 fs/ext4/ialloc.c:1215
 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

read to 0xffff88810260500e of 2 bytes by task 1825 on cpu 0:
 ext4_free_inodes_count+0x18/0x80 fs/ext4/super.c:347
 find_group_orlov+0x7c7/0x840 fs/ext4/ialloc.c:505
 __ext4_new_inode+0x67c/0x30b0 fs/ext4/ialloc.c:1017
 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: 0x1b72 -> 0x1b71

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1825 Comm: syz-executor.0 Not tainted 5.17.0-rc2-syzkaller-00039-g9f7fb8de5d9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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