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BUG: KCSAN: data-race in ext4_free_inodes_count / ext4_free_inodes_set

write to 0xffff8881035bb00e of 2 bytes by task 5008 on cpu 1:
 ext4_free_inodes_set+0x1b/0x80 fs/ext4/super.c:385
 ext4_free_inode+0x615/0xa30 fs/ext4/ialloc.c:323
 ext4_evict_inode+0xbff/0xf10 fs/ext4/inode.c:332
 evict+0x1aa/0x410 fs/inode.c:590
 iput_final fs/inode.c:1670 [inline]
 iput+0x3ef/0x580 fs/inode.c:1696
 dentry_unlink_inode+0x23d/0x250 fs/dcache.c:376
 d_delete+0x78/0xa0 fs/dcache.c:2505
 vfs_rmdir+0x2bf/0x2e0 fs/namei.c:3982
 do_rmdir+0x18d/0x330 fs/namei.c:4030
 __do_sys_rmdir fs/namei.c:4049 [inline]
 __se_sys_rmdir fs/namei.c:4047 [inline]
 __x64_sys_rmdir+0x2c/0x30 fs/namei.c:4047
 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 0xffff8881035bb00e of 2 bytes by task 16532 on cpu 0:
 ext4_free_inodes_count+0x18/0x80 fs/ext4/super.c:329
 find_group_other fs/ext4/ialloc.c:595 [inline]
 __ext4_new_inode+0x82a/0x2fc0 fs/ext4/ialloc.c:1019
 ext4_symlink+0x2cc/0x700 fs/ext4/namei.c:3293
 vfs_symlink+0x241/0x330 fs/namei.c:4248
 do_symlinkat+0x104/0x380 fs/namei.c:4277
 __do_sys_symlink fs/namei.c:4299 [inline]
 __se_sys_symlink fs/namei.c:4297 [inline]
 __x64_sys_symlink+0x52/0x60 fs/namei.c:4297
 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: 0x1abf -> 0x1ac0

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16532 Comm: syz-executor.5 Tainted: G        W         5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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