static void kill_f2fs_super(struct super_block *sb)
{
	if (sb->s_root)
		set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
	kill_block_super(sb);
}

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.